HomeMy WebLinkAbout; Ecological Resources of Agua Hedionda Lagoon; Ecological Resources of Agua Hedionda Lagoon; 1995-09-011994 and 1995 Field Survey Report
of the Ecological Resources of
Agua Hedionda Lagoon
Submitted To:
San Diego Gas and EJectric Company
4600 Carlsbad Boulevard
Carlsbad, CA 92008
Submitted By;
MEC Analytical Systems, Inc.
2433 Impala Drive
Carlsbad, California 92008
September 1995
AGUA HEDIONDA LAGOON September 1995
TABLE OF CONTENTS
1.0 INTRODUCTION 1
1.1 Environmental Setting 1
1.2 Dredging History 3
2.0 METHODS 7
2.1 Eelgrass Reconnaissance Survey 7
2.2 Shoreline Habitat Reconnaissance Survey 8
2.3 Bird Surveys 8
2.4 Fish Surveys 11
2.5 Benthic Surveys 13
3.0 RESULTS AND DISCUSSION 16
3.1 Sensitive Habitats 16
3.1.1 Distribution of Eelgrass 16
3.1.2 Distribution of Salt Marsh 22
3.1.3 Historical Comparison 23
3.2 Birds 25
3.2.1 Species Composition, Density, and Distribution 25
3.2.2 Human Use and Disturbance 30
3.2.3 Special Status Species 31
3.2.4 Historical Comparison 32
3.3 Fish 33
3.3.1 Species Composition, Density, and Distribution 33
3.3.2 Sensitive Species 36
3.3.3 Historical Comparison 36
3.4 Benthic Invertebrates 37
3.4.1 Species Composition, Density, and Distribution of
Macroinvertebrates \. 38
3.4.2 Species Composition, Density, and Distribution of Infauna .... 40
3.4.3 Sensitive Species 42
3.4.4 Historical Comparison 42
4.0 SUMMARY 44
LITERATURE CITED 46
APPENDIX A BIRD DATA
APPENDIX B FISH DATA
APPENDIX C BENTHIC DATA
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
1.0 INTRODUCTION
This report summarizes the results of field surveys conducted between April 1994 and
June 1995 at Agua Hedionda Lagoon. The purpose of these surveys was to characterize
the ecological resources in the aquatic and shoreline habitats of the lagoon.
The survey designs and methods were developed in consultation with the California
Department of Fish and Game, National Marine Fisheries Service, U.S. Army Corps of
Engineers, and U.S. Fish and Wildlife Service during an interagency meeting on June 24,
1994. Survey plans were submitted to and approved by the agencies prior to initiation of
the field work. At the time of the survey planning, a dredging project for the middle and
inner sections of the lagoon was being considered by San Diego Gas and Electric
Company (SDG&E), which operates a power plant adjacent to the lagoon. The surveys
were designed to provide adequate environmental information to support agency review
of a dredging project.
1.1 Environmental Setting
Agua Hedionda Lagoon is a "man-made" water body located on the southern California
coastline within the incorporated area of the City of Carlsbad (Figure 1.1). It extends 1.7
miles inland, and is up to 0.5 mile wide (Bradshaw et al. 1976). The lagoon is transected
by three major thoroughfares: Carlsbad Boulevard (Highway 101) at the coastline;
Atchison Topeka and Santa Fe (AT&SF) railroad, about 1500 ft to the east; and Interstate
5 (I-5), about 1000 ft farther east. The roadbeds of these thoroughfares effectively divide
the water body into three sections, commonly referred to as the outer, middle, and inner
lagoons. Acreage encompassed within the high tide mark (i.e., the subtidal and intertidal
areas) is about 66 acres in the outer lagoon, 23 acres in the middle lagoon, and 197 acres
in the inner lagoon (P. Pike, SDG&E, personal communication, 1994).
The western shore of the outer lagoon is bounded by Carlsbad Boulevard. The southern
shore of the outer and middle lagoons is occupied by SDG&E's Encina power plant and
related support facilities. The southern shore of the inner lagoon is undeveloped with
adjacent land being used for agriculture. Development is adjacent to most of the northern
shore of the lagoon except for some marshy and unvegetated flats at the eastern end of
the inner lagoon. The eastern extreme of the inner lagoon is undeveloped.
The lagoon was constructed in 1954 to provide cooling water for the Encina Power Plant.
Waters enter the lagoon from the ocean through an inlet channel located at the
northwestern end of the outer lagoon. The power plant draws waters from the outer
lagoon, and discharges the cooling water into a separate discharge channel that empties
directly into the ocean.
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
Anaheim Bay
Upper Newport Bay
ORANGE
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AGUA HEDIONDA LAGOON''
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Mission Bay
San Diego Bay
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Figure 1.1. Geographic map showing the location of Agua Hedionda Lagoon.
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
Tides in the lagoon are semi-diurnal, ebbing and flooding twice each day. As is typical for
the area, flushing rates vary as a result of bimonthly tidal range fluctuations (i.e., spring and
neap tides). Tide elevations fluctuate between extremes of -4.6 and +4.3 ft National
Geodetic Vertical Datum (NGVD) (Jenkins and Wasyl 1993).
Agua Hedionda Creek and its main tributary, Buena Creek, drain a 29 square mile area
from the San Marcos Mountains to Agua Hedionda Lagoon (USACOE 1973). The stream
channel and flood plain vary along its course; the channel is shallow and indistinct with a
broad flood plain adjacent to the lagoon.
Mean seasonal precipitation for the drainage area ranges from about 11 inches near the
coast to about 18 inches in the mountains with most rainfall between December and March
(USACOE 1973; Wells and Price 1989). Freshwater enters the lagoon via Agua Hedionda
Creek during the rainy season, and also enters via storm drains, urban runoff along the
northern shore, and agricultural runoff along the southern shore (Bradshaw et al. 1976;
Wells and Price1989). Twenty-five major storm drains have outfalls that discharge into
Agua Hedionda Lagoon; no illicit connections or illegal discharges were identified in the
Agua Hedionda watershed during dry weather storm water monitoring in 1993 (N. Diele,
City of Carlsbad, personal communication, 1994).
In addition to the power plant, the lagoon supports several other uses. SDG&E provides
a parking lot for public access and fishing (Encina Fishing Area) along the western shore
of the outer lagoon. Mariculture of mussels and oysters is conducted by a private firm in
the outer lagoon. A YMCA camp is on the western shore of the middle lagoon, and the
area is used for boating (non-power) and fishing. The inner lagoon is used for recreational
water sports, particularly boating, water skiing, and jet skiing (Figure 1.2).
1.2 Dredging History
SDG&E purchased the Agua Hedionda slough and adjacent property along the southern
shore in the 1950's to construct the Encina Power Plant and a tidal basin to provide its
cooling water. The slough was a silt choked, 230 acre marsh that only occasionally was
open to the sea (Lillevang 1966; Bradshaw et al. 1976). Presumably, odors resulting from
stagnant water conditions is how the slough got its Spanish name, which means stinking
water.
SDG&E and private contractors dredged about 4.3 million cubic yards (cu yd) of sediment
from the slough in 1954, attaining depths of about 8 ft below mean sea level (MSL) (7.8 ft
NGVD) throughout most of the lagoon (Ellis 1954). Two settling basins were included in
the design: one in the outer lagoon (-20 ft MSL) to trap sands carried in from the ocean,
and one at the eastern end of the inner lagoon (-17 ft MSL) to trap incoming sediments
from the Agua Hedionda Creek (Leeds 1953; Jenkins and Skelly 1988).
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AGUA HEDIONDA LAGOON September 1995
The lagoon functions as an effective coastal sediment trap due to its short and porous
jetties and rectification of tidal currents (i.e., ebbing currents weaker than flooding currents)
due to the diversion of lagoon water through the power plant condensers (Jenkins and
Skelly 1988). Maintenance of the lagoon since its construction has been limited to the
dredging of littoral sands that become trapped in the outer lagoon, and dredging has taken
place every one to three years since 1955 (Jenkins and Skelly 1988; USACOE 1993).
Dredged materials have been used to replenish the beach both north and south of the
lagoon inlet. No dredging has occurred in the middle and inner lagoons since construction.
Substantial sediment infilling has occurred in the outer lagoon since the 1993 dredge cycle,
and in the middle and inner lagoons since their construction. Large sandbars occur in the
outer and middle lagoons, and a pair of sandbars are found at the western end of the inner
lagoon (Figure 1.3). The formation of sandbars in the middle and inner lagoons was first
noticed in 1960 (Bitter 1972), and they have greatly expanded since then. Grain size
analyses indicate that sandy sediments, which result from the intrusion of beach sands,
characterize the middle lagoon deposits (MEC 1993a). The bars in the west inner lagoon
are sandy also, but with a higher silt/clay content than the bar in the middle lagoon.
The -17 ft. MSL sediment trap in the inner lagoon has filled entirely. A sediment delta of
fine sediments has developed at the eastern end, extending 1000 ft or more into the
lagoon. Runofff from surrounding agricultural fields, urban development construction, and
the Agua Hedionda Creek watershed are considered sources of these sediments (Leighton
and Associates 1988 cited in Jenkins and Skelly 1988; MEC 1993a).
«• MEC Analytical Systems, Inc.
to
AGUA HEDIONDA LAGOON September 1995
Inlet
Channel
PACIFIC
OCEAN
Discharge fc^
Channel
1009 FEET
700 «OOUCTEKS
•'""."."_> Sand bar or delta
Figure 1.3. Locations of sand bars and the sediment delta in Agua Hedionda Lagoon.
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
2.0 METHODS
Field reconnaissance surveys of eelgrass and sensitive shoreline habitats were performed
in April 1994. Monthly bird surveys were conducted from June 1994 through June 1995.
Fish and macroinvertebrates were surveyed during the summer (July 1994) and spring
(April 1995) seasons when highest abundances are expected. Benthic infaunal
invertebrates also were surveyed during the spring fish survey. The survey plans for each
of these resource components are described in the following subsections.
On tables and in the text, distances are reported in feet (ft) and/or meters (m). Mean sea
level (MSL) at Agua Hedionda Lagoon is +0.19 ft NGVD (Jenkins and Wasyl 1993); mean
lower low water (MLLW) is equivalent to -2.8 ft MSL (or -2.6 ft NGVD). Water depths at
the time of sampling are reported for fish and infauna sampling.
2.1 Eelgrass Reconnaissance Survey
A reconnaissance survey to determine the distribution of eelgrass in the outer, middle, and
inner lagoons was conducted April 18-20,1994 during neap tide conditions. The location
of eelgrass was determined by SCUBA divers in the outer and middle lagoons. SCUBA
diving in the inner lagoon proved ineffective due to poor visibility. Eelgrass in the shallow
inner lagoon was more efficiently observed from the water surface and periodically
confirmed by diving. Divers noted whether the eelgrass was patchy or continuous in
distribution, and took one to three density measurements (number of stems per 0.25 m2)
in representative bed areas.
The distribution of eelgrass was mapped by marking the lagoon^ward edges of the
eelgrass beds with weighted pop-float buoys. The latitude and longitude of the pop-float
buoys were located with a Magnavox X200 Global Positioning System (GPS). Eelgrass
locations were plotted by SDG&E survey staff on bathymetric maps of the lagoon from the
GPS marks. Multiple GPS readings were taken at known reference locations within each
section of the lagoon, both before and after surveying eelgrass locations, to facilitate
establishment of a plotting grid for mapping. The GPS system was field demonstrated to
be accurate within a range of 6.5 ft (2 m) for most areas of the lagoon; accuracy was poor
along the southern side of the inner lagoon probably due to signal obstruction from the high
elevation bank. Map locations along the south side of the inner lagoon were adjusted
based on field notes and depth contours.
Eelgrass locations in the outer lagoon additionally were surveyed by SDG&E personnel
using a bearing-bearing intersection technique. This technique provides accuracy within
a range of 0.2 ft of the object, and is routinely used by SDG&E to accurately map eelgrass
in the outer lagoon before and after maintenance dredging (P. Pike, SDG&E, personal
communication, 1994). The greater degree of mapping accuracy for the outer lagoon was
necessary since the field survey also was used to produce the post-dredging eelgrass map
for the 1993 dredging cycle.
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
2.2 Shoreline Habitat Reconnaissance Survey
The perimeter of the middle and inner lagoons was surveyed on April 27-28, 1994 to
determine the occurrence and locations of sensitive habitat such as salt marsh. Locations
were determined with the aid of an aerial photograph and landmarks. The perimeter was
defined as the area from the water's edge to 25 ft inland from the high tide mark. The
locations of salt marsh habitat along the shore of the lagoon were added to the maps of
eelgrass distribution.
In addition, the 1994 reconnaissance was used to provide recent field validation of a 1993
habitat mapping, which was based on the analysis of a 1:500 scale color aerial photograph
taken in March 1993 (MEG 1993b). The aerial photograph originally was interpreted by
Wetlands Research Associates (WRA) using U.S. Geologic survey (USGS) topographic
maps, National Wetlands Inventory (NWI) maps, and experience from previous site visits.
Habitats at or below the 10-foot topographic contour line (NGVD) were delineated. The
field validation focused on shoreline habitats.
2.3 Bird Surveys
The purpose of the surveys was to characterize annual bird utilization of Agua Hedionda
Lagoon. Reconnaissance surveys of the east inner lagoon were conducted in June and
July 1994. Methods established during the reconnaissance surveys were followed during
subsequent surveys of the entire lagoon. Birds were censused once each month in the
entire lagoon from August 1994 through June 1995. Surveys generally were conducted
in the morning hours between 8 a.m. and noon; a couple of surveys were conducted in late
afternoon. Shorebird habitat was surveyed within 2 hours of low tide conditions.
Censusing took place from land vantage points, and from an inflatable boat. Total
saturation coverage methodology was employed, whereby all birds were counted
according to species, lagoon section, and habitat. Specifics regarding census information,
sampling locations, and habitat are given below.
Census Information
All birds were identified and counted by species. Evidence of nesting (e.g., nests, chicks,
and fledglings) was separately recorded.
Lagoon Sections, Habitats, and Shorelines
Birds were censused in four sections of the lagoon (Figure 2.1), as follows:
(1) outer lagoon
(2) middle lagoon
(3) west inner lagoon (i.e., west of Bristol Cove)
(4) east inner lagoon (i.e., east of Bristol Cove)
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
Inlet
Channel
PACIFIC
OCEAN
Km FEET Sand bar or delta
Figure 2.1. Lagoon sections and shoreline designations for the 1994 and 1995 bird
surveys at Agua Hedionda Lagoon.
MEC Analytical Systems, Inc.
AGUA HEDIONDA LAGOON September 1995
The inner lagoon was divided into east and west sections because of differences in
sedimentation and depth. The west inner lagoon has sandbars near the channel to the
middle lagoon, and maximum depths are about -8 to -9 ft. MSL. The east inner lagoon has
a shallow sediment delta at the eastern extreme, and maximum depths range from -2 ft.
at the eastern extreme to -8 ft. MSL near Bristol Cove (= Shelter Cove) (see Figures 3.4
and 3.5 in Section 3.0 for depth contours).
Within each lagoon section, birds were censused according to the following twelve
habitats:
(1) Open water
(2) Intertidal flat (i.e., soft substrate)
(3) Bank (i.e., elevated area above high tide zone)
(4) Beach (i.e., area above intertidal)
(5) Rip rap (i.e., large boulders and/or rock on intertidal)
(6) Sandbar or sediment delta
(7) Salt marsh
(8) Salt panne
(9) Seasonal ponds
(10) Aquaculture (=mariculture) racks
(11) Other perches (e.g., docks, barges)
(12) Aerial
Habitats on land (i.e., bank, beach, intertidal flat, rip rap, salt marsh, salt panne, seasonal
pond) data were recorded according to lagoon shoreline (e.g., east, west, north, south).
For the outer lagoon, the west shoreline was defined as adjacent to Carlsbad Blvd., and
the remaining shoreline was considered either north or south. The shoreline of the middle
and west inner lagoon sections was recorded as either north or south.
The shoreline of the east inner lagoon was recorded as either north or south (with the
boundary being at the eastern extreme where the creek channel enters the lagoon) for all
terrestrial habitats except for the intertidal flat.
Because of the movement of birds while foraging on the intertidal flats, it was more
accurate to divide the shoreline of the intertidal flat into north, south, and east shores. The
north shore was defined as extending east from Bristol Cove (= Shelter Cove) to the end
of the adjacent sandy beach. The south shore was defined as being on the opposite side
of the lagoon from Bristol Cove to the beach on the south shore. The east shore extended
from the eastern edge of the beach on the north shore to the edge of the beach on the
south shore. The beach locations, as well as some of the habitats mentioned above, may
be seen on Figure 3.1 in Section 3.0 of this report. The beach locations east of Bristol
Cove, have a habitat code of 721 and are light in color on Figure 3.1.
MEC Analytical Systems, Inc. 10
AGUA HEDIONDA LAGOON September 1995
2.4 Fish Surveys
Fish were collected by beam and otter trawl nets towed by boat, and by seine nets
deployed from shore. The beam trawl samples also were processed for macro-
invertebrates; i.e., larger epifauna that live on the sediment surface.
Surveys were conducted in July 1994 and April 1995. Water quality (dissolved oxygen, pH,
salinity, temperature) and water transparency (Secchi depth) were recorded at each trawl
station during the surveys.
Specifics regarding sampling gear, stations, and sample analysis are given below.
Sampling gear
12 ft (3.7m) otter trawl,
3.3 ft (1 m) wide beam trawl,
6 x 50 ft (1.8 x 15.2 m) beach seine with a 6 x 100 ft (1.8 x 30 m) barrier net,
Hydrolab water quality analyzer,
Secchi disc.
Lagoon Sections and Stations
Fish were surveyed in the same four lagoon sections as birds: outer lagoon, middle lagoon,
west inner lagoon, and east inner lagoon. The approximate station locations for the trawl
and seine sampling are shown on Figure 2.2. Depth and shoreline conditions were taken
into consideration when selecting gear types for each lagoon sections. For example,
seines were not used in the outer lagoon because the shoreline is lined with rip rap. The
large otter trawl was not used in the middle lagoon because of eelgrass density, or in the
east inner lagoon because of soft sediments and insufficient water depth. The types of
samples collected in each lagoon section are summarized below.
outer lagoon -1 otter trawl, 2 beam trawls
middle lagoon - 3 beam trawls, 2 beach seines
west inner lagoon -1 otter trawl, 2 beam trawls, 2 beach seines
east inner lagoon - 2 beam trawls, 3 beach seines
Equipment Deployment
The otter and beam trawls were towed on the lagoon bottom from an inflatable boat for a
standardized time of 5 minutes at constant traveling speed.
Multiple beach seines were conducted within a barrier net set at each station. The barrier
net was set with the shore serving as one edge of a 328 ft.2 (100 m2) rectangle or square.
Four beach seine hauls were conducted within the barrier net, and a final (fifth) haul
consisted of retrieval of the barrier net.
MEC Analytical Systems, Inc. 11
AGUA HEDIONDA LAGOON September 1995
was K£T
OUKETCKS
Trawl Tracks
July 94 and April 95
.'"" .'.".:• Sand bar or delta
or
April 95
Figure 2.2. Locations of beach seine (S), beam trawl (B), and otter trawl (O) stations for
the 1994 and 1995 surveys of fish at Agua Hedionda Lagoon.
MEC Analytical Systems, Inc.12
AGUA HEDIONDA LAGOON September 1995
Hydrolab readings were taken at the trawl stations for dissolved oxygen, pH, salinity, and
temperature at the surface, mid-water, and bottom if water depths were in excess of 4 ft,
or at the surface and bottom at shallower depths. The depth at which the Secchi disc was
no longer visible from the water surface was recorded as a measure of water transparency.
Sample Analysis
All fish were counted and identified to the lowest practicable taxon (usually species). Small
juvenile atherinids (< 25 mm), engraulids (< 50 mm), and gobiids (< 25 mm) were identified
to family. Unless extremely abundant, fish were measured (standard length) and weighed.
When there were more than 100 individuals of a species, the additional fish were
measured by size class (cm) and batch weighed. Fish were field processed and released
to the extent practicable.
2.5 Benthic Surveys
Macroinvertebrates collected by beam trawl during the fish surveys were analyzed to
provide a measure of the benthic community in the lagoon. Animals were counted and
identified to the lowest practicable taxon (usually species), and released in the field to the
extent possible.
Small infaunal invertebrates that live within the sediment were collected in each of the
same four lagoon sections surveyed for birds and fish. One survey was conducted in April
1995, to coincide with the fish survey during the spring season. Samples were collected
from subtidal habitats within eelgrass beds, non-vegetated areas, on the bars that occur
within the middle and inner lagoons, and on the sediment delta at the east end of the inner
lagoon. Samples were collected for the analysis of grain size at half the stations.
Stations
A total of twenty-six stations were sampled from the different lagoon sections (Figure 2.3),
and are summarized below according to lagoon section.
Lagoon Section
Outer Lagoon
Middle Lagoon
West Inner Lagoon
East Inner Lagoon
Total
Habitat
within eelgrass bed
non-vegetated
within eelgrass bed
non-vegetated
non-vegetated bar
within eelgrass bed
non-vegetated
bar with eelgrass
within eelgrass bed
non-vegetated
non-vegetated deltajbar)
Number of benthic
samples
2
2
2
2
2
2
4
2
2
2
4
26
Number grain size
samples
1
1
1
1
1
1
2
1
1
1
2
13
MEC Analytical Systems, Inc.13
AGUA HEDIONDA LAGOON September 1995
"."' Sand bar or delta
within edgrass bed
O non-vegetated
+ grain size also collected
Figure 2.3. Locations of stations for the 1995 survey of benthic infauna at Agua
Hedionda Lagoon.
MEC Analytical Systems, Inc.14
AGUA HEDIONDA LAGOON September 1995
Sampling Gear
Divers used a 3 in (7.6 cm) diameter by 20 in (50 cm) deep (0.005 m2 area) hand-coring
device to collect biological and sediment grain size samples. The same diameter core, but
with a 6 in (15 cm) depth was used to collect samples in sandy sediments.
Field Sample Processing
Each biological sample was washed in the field through a 1.0 mm sieve. Material retained
on the sieve was transferred to labeled quart jars, and a solution of magnesium chloride
and lagoon water was added to the jar to anesthetize the organisms for about 30 minutes.
Samples were then fixed with a 10% Formalin/seawater solution. Grain size samples were
placed in labeled plastic bags and stored on ice for transport to the laboratory.
Laboratory Analysis
After at least 72 hours, the formalin solution was drained and washed from the samples,
which were then preserved with 70% ethanol. Samples were sorted by major taxonomic
group (annelids, crustaceans, mollusks, minor phyla, insects) by trained technicians.
Taxonomists counted and identified animals to the lowest practicable taxon (usually
species). Wet weight biomass was determined for each of the major taxonomic groups by
transferring the vial contents to a 0.3 mm screen, vacuum-aspirating for 10 seconds, and
weighing to the nearest 0.001 g using an ASP Z400 DR balance.
Grain size of the sediment samples was determined for particles larger than 64 microns
by gravimetric sieving, and for smaller particles by standard pipette methods (Plumb 1981).
MEC Analytical Systems, Inc. 15
AGUA HEDIONDA LAGOON September 1995
3.0 RESULTS AND DISCUSSION
3.1 Sensitive Habitats
Four main habitat categories occur within and adjacent to the lagoon: subtidal, flats, marsh,
and upland. Several habitat maps have been prepared for the lagoon environment, the
most recent by Wetland Research Associates (WRA) (MEC 1993b) (Figure 3.1). The April
1994 reconnaissance survey indicated that the previous maps are still generally valid.
The focus of the 1994 reconnaissance surveys was to locate sensitive eelgrass habitat
within the lagoon, and sensitive habitat within 25 ft of the shoreline. The distribution of
eelgrass within the lagoon is described in Subsection 3.1.1. Intertidal flats and marsh
habitats are described in Subsection 3.1.2.
3.1.1 Distribution of Eelgrass
Eelgrass (Zostera marina) in the outer lagoon occurred primarily along the shoreline
(Figure 3.2); its distribution is largely controlled by the agency approved limits of
maintenance dredging in that section of the lagoon. Little eelgrass occurred near the inlet,
and then occurred first in patches and then in larger beds along the west and northeast
shores. Eelgrass was well developed along the southeast shore. Average eelgrass
density ranged from 36 to 77 stems per quarter square meter. Eelgrass occurred to depths
of -18 ft MSL in the outer lagoon.
Eelgrass was found throughout most of the middle lagoon with the exception of the top of
the sandbar, and in most of the channel between the outer and inner lagoons (Figure 3.3).
Maximum depths in the middle lagoon were about - 8 to -9 ft MSL with the exception of
two scour holes (depths > 20 ft MSL) in the channel between the outer and inner lagoon.
Average eelgrass density in the middle lagoon ranged from 37 to 73 stems per quarter
square meter, and eelgrass occurred at depths between about -2 and -9 ft MSL.
Substantial eelgrass occurred on the sandbars of the west inner lagoon, and in narrow
bands along the shoreline (Figure 3.4). Similar to the middle lagoon, maximum depths in
the west inner lagoon were about - 8 to -9 ft MSL. However, the lower limit of eelgrass in
the west inner lagoon only extended to about -4 to -5 ft MSL. Average eelgrass density
along the shore ranged from 15 to 44 stems per quarter square meter, and beds started
to become patchy along the south shore. Eelgrass density on the sandbar averaged 52
stems per quarter square meter.
Continuing further east, eelgrass thinned to non-continuous, patchy beds with an average
density of 40 stems per square meter; no eelgrass was observed at the far eastern end of
the lagoon (Figure 3.5).
MEC Analytical Systems, Inc. 16
Estuanne open water
Coastal scrub and chaparral
Southern coastal salt marsh
Coastal brackish/freshwater marsh
Riparian
Tidal estuarine flats (sand and mud)
Nontidal estuarine flats (sand and mud)
Bluffs (Nonvegetated)
Ruderal
Agricultural
Nonvegetated disturbed
Urban
Habitats within and adjacent to Agua Hedionda Lagoon (Source: MEC
1993b, aerial photograph interpreted by Wetlands Research Associates).* 1994 reconnaissance noted mixed habitat consisting
mainly of ruderal and coastal scrub and chaparral
'* 1994 reconnaissance noted some salt marsh
species
- ETL GRASS LDCATtt APRIL I9M
• KL WASS LBCATUl JtrexXR IM3
ENCINA OUTER UGOON
CARLSBAD
NOTES:
"OTEi AWL 1994
*VWABE KNSITY OF Ed.™*" • t Of PLANTS PERrflJKAtr
•CO E - 40 STEMS10 ' - 48 ITEM
JH * - » «TEMJ•JJ I* - SI STEMS«" 17 - 77 ITCMS
11/4 nrttr »a • 8.7 M jc
NOTEi KCCMJER 1993
AVOMGC OCMSm CF EELDUJS • 9 PLANTS PE«XMMRE roar - AS HCASUNEIW THE THttt HAJW EELADEAi.
•"on w frarm
SHIET 1/4
•UN IBM a*i * mrnur
BNCINA LACOONS
ACUA HBDIONDA
CARLSBAD
. ~ PAT
Figure 3.2. April 1994 distribution of eelgrass in the outer lagoon.18
I
I
I
I
I
ft. IM BED e
MIDDLE LAGOON
BED 8-37 STEMS
BED 10 - 73 STEMS
NOTE: ELEVATIONS AND CONTOURS ARE JUNE 1993 SOUNDINGS
Figure 3.3. April 1994 distribution of eelgrass and salt marsh in the middle lagoon.
I
I
I
I
I
I
ENCINA INNER LAGOON
BETT23 ( PATCHY
EEl SRASS DENSITY AND LOCATION
EC MEC ANALYTICAL SYSTEMS, INC.
APRIL 199'
NOTE: IN THE INNER LAROON
AVERAGE DENSITY OF EEl. ORASS - | OF PLANTS
PER 1/4 METER SQUARED.
BCD 1« - 15 STEMS
BED 20 - 40 STEMS
BED 23 - 44 STEMS
BED !5 « 52 STEMS
BED 26 - 30 STEMS
(1/4 m«t«r to. - 2.7 ft 10.'
menu LAGOONS
AGUA HDIONDACARLSBAD
AGUA HED10NDA LAGOON AfTCK ORCDCt CIJYA110NHOTD ELEVATlOHi WW CONTOURS ARC fXOU JOHC 1»3
Figure 3.4. April 1994 distribution of eelgrass and salt marsh in the west inner lagoon.20
II
I
I
I
I
ones DENStrr AND LOCATIONfl MCC ANALYTICAL 5YSTQ4S.trm.IIMER LAGOONoExsnv or EELO BRASS - I OF PIAKTS
PER 1/4 METW SQUAMD.
19 - 15
BCD 20 - 40 STEMS
KD 23 - 44 STEWS
BED 28 » 52 STEMS
BED 2« - 3C STEMS
(1/4 n»tor M. - 2.7 n. -)
INNER LAGOON
-# I • PSDPOStl AFTER DREtCE ELEVATIDH
8i500 > VCLUHE OF THE -17 IASIH
449JM - VDLU* rmw THE -17 IAJ1N TD STA.
- VDLUHE OF THE 1SLANI
> TOTAL VOLUME INNER LAGOON
NOTE :
ELEVATIONS AND CONTOURS ARE
FROM JUNE 1993 SOUNDINGS KNCTNA UGOONS
AGUA HBD10ND*
CARLSBAD
RANCHO AGUA HED10NDA
Figure 3.5. April 1994 distribution of eelgrass and salt marsh in the east inner lagoon.21
m AGUA HEDIONDA LAGOON September 1995
m 3.1.2 Distribution of Salt Marsh
•• Nearly the entire shoreline of the outer lagoon is armored by rock revetment; one exception
M is at the southeast shore where the intertidal is sandy with cobble patches. Rock rip rap
also lines the channels between the outer and middle lagoons and between the middle and
«* inner lagoons.
M
Salt marsh and tidal flats occur along the shores of the middle and inner lagoons.
P Common salt marsh species included pickleweed (Salicomia virginica), saltgrass
H (Distichilis spicata), fleshy jaumea (Jaumea camosa), and alkali heath (Frankenia
grandifolia). Brackish/freshwater marsh species such as cattail (Typha latifolia), bulrush
m (Scirpus sp.), and spiny rush (Juncus sp.) occur in small areas in the inner lagoon.
H
The middle lagoon has narrow tidal flats along each shore; the widest flats occur along the
m north shore and at the eastern end of the south shore. The north shore has narrow tidal
^ flats, and pickleweed occurred above mean high water in the northwest and northeast
corners, and in scattered, small patches in between (Figure 3.3). The parasitic plant
Cuscuta salina was associated with the pickleweed. The east shore has a narrow bank,
11 and scattered small patches of pickleweed were scattered along this shore.
«•The inner lagoon is bordered by steep banks on the north and south sides, and low lying
m areas at the east end. Rocky cobble and boulder areas were noted along the northwestern
m shore from the entrance channel to the Snug Harbor Marina; concrete and tire shore
ta protection was being used at Snug Harbor Marina; cobble, boulders and some concrete
occurred in the vicinity of Agua Hedionda Point and the Carlsbad Boat Club; and rip rap
*. was observed on both sides of the entrance to Bristol Cove. Tidal flats become exposed
ta during low tide along most of the shoreline of the west inner lagoon. Salt marsh plants
occurred in small patches in the Snug Harbor Marina area, and extended as a narrow
— fringe along the eastern shore of Snug Harbor about half-way towards Agua Hedionda
^ Point (Figure 3.4; see Figure 3.1 for locations of landmarks). Pickleweed and saltgrass
were best developed just east of the Snug Harbor Marina. A small stand of cattails also
— occurred in this vicinity. Banks measuring about 2 to 5 ft high occur east of the marina
». towards Agua Hedionda Point, and pickleweed occurred in scattered patches along the
lower portions of the bank. Saltgrass was common on the edges of the bank. Golden
"" weed (Haplopappus ericoides) and iceplant occurred on the banks. No salt marsh plants
IN were observed between the Carlsbad Boat Club and the Bayshore Drive public access.
Instead, non-vegetated disturbed land and ruderal (mainly weedy) vegetation were
"" common.
*•
Mudflats were best developed at the east end of the inner lagoon, and have expanded in
"" recent years due to extreme sedimentation. Sandy flats occur at the Bayshore Drive public
•• access, and there are two beach areas along the southern shore of the inner lagoon that
have expanded in size since the 1970's. The most extensive salt marsh occurred east of
"" the Bayshore Drive public access and extended to the eastern end of the lagoon (Figure
•• 3.5). This area was dominated by pickleweed, mudflat, tidal creeks, and non-tidal flats.
^ Pickleweed was best developed along the lagoon bank and tidal channels, and decreased
IH
MEC Analytical Systems, Inc. 22
AGUA HEDIONDA LAGOON September 1995
in vigor within a short distance from those areas where regular tidal flushing occurs. The
parasitic plant Cuscuta salina occurred on some of the pickleweed. Fleshy jaumea
occurred in patches near the tidal channels and along the lagoon bank. Alkali heath and
saltgrass sparsely occurred in upper mid-marsh areas.
3.1.3 Historical Comparison
Eelgrass
The present distribution of eelgrass is less than it was twenty years ago (Figure 3.6).
Twenty years ago, there was more eelgrass in the middle lagoon because of the smaller
size of the sandbar. Additionally, eelgrass formed a much more continuous bed in the
western section of the inner lagoon, and patches of eelgrass extended further east.
Bradshaw et al. (1976) indicated that the distribution of eelgrass in Agua Hedionda Lagoon
appears to be controlled by depth, substrate stability, and light availability (i.e., the water
sufficiently clear for photosynthesis). Light levels were considered the primary factor
controlling the density of eelgrass relative to depth in the middle lagoon by Backman and
Barilotti (1976). Because of the changes that have occurred in the lagoon due to sediment
infilling over the last twenty years, it is reasonable that depth, substrate stability, and light
all have contributed to the present distribution of eelgrass.
The decreases in eelgrass since the 1970's in the shallower eastern end of the lagoon may
relate to sediment deposition, and to some infilled areas being too shallow for eelgrass.
It is unknown to what extent the decrease in eelgrass in the west inner lagoon relates to
turbidity or to powerboat use, either directly (e.g., by removal) or indirectly (e.g., by
increased turbidity and reduced light). Eelgrass in the west inner lagoon occurred close
to shore and within areas around the sandbars that are protected from boating by warning
buoys (refer to Figures 1.2 and 3.4).
Salt Marsh
The present study indicated that the previous habitat maps are still generally valid;
however, more wetland habitat was noted than previously reported. The "new" wetland
areas (salt marsh) were located in the middle lagoon, and in the Snug Harbor Marina area
of the inner lagoon. Previous reports of the largest expanse of salt marsh occurring at the
east end of the lagoon were confirmed by the 1994 reconnaissance. The salt marsh of the
east inner lagoon was characterized by Bradshaw et al. (1976) as having very limited plant
diversity. This was confirmed by the 1994 reconnaissance which noted a low plant
diversity and a reduced vigor of pickleweed within a short distance from the lagoon bank
and tidal channels.
MEC Analytical Systems, Inc. 23
0 LEGEND
D
I
I
D
I
I
II
D
0
BOUNDARY OF HABITAT STUDY AREA
ESTIMATED HIGHEST JIDE OK SANDY SHORE
\-\ \PELAGIC
GRASS, ZOSTER A MARINA
ESTIMATED LOWEST TIDE
APPROXIMATE LOCATION OF CHANNELCARLSBAD
VEGETATION
BRACKISH WATER ALLUVIAL FAN
Figure 3.6. Distribution of eelgrass and salt marsh in Agua Hedionda Lagoon in 1975
(Source: Bradshaw et al. 1976).Page 24
" AGUA HEDIONDA LAGOON September 1995
m
to 3.2 Birds
"" Southern California estuaries and lagoons, provide habitat for migratory as well as resident
m bird populations. During the spring and fall, migrating shorebirds and waterfowl arrive to
^ refuel and rest as they make their journeys northward or southward. In addition, breeding
migrants such as some terns (e.g., California Least Tern) fly specifically to southern
*" California lagoons and estuaries to nest.
Bird utilization at Agua Hedionda Lagoon during 1994 and 1995 is summarized in
"" Subsection 3.2.1 below. Because of the many recreational uses of the lagoon, human use
p. and disturbance to birds is discussed in Subsection 3.2.2. Special status species are
addressed in Subsection 3.2.3., and results are compared to historical studies in
Subsection 3.2.4.
m Data from the field surveys are presented in Appendix A. Count data for each species by
survey are presented in Appendix A.1; count data by survey, lagoon section, and habitat
— are in Appendix A.2; and count data by bird category, habitat, lagoon section, and shore
„. are given in Appendix A.3.
"" 3.2.1 Species Composition, Density, and Distribution
w
A total of 81 species were identified during June 1994 through June 1995 surveys. The
""" majority of the species were water associated birds, accounting for 61 species
»• (approximately 75 percent of the total number of species) (Table 3.1). Of these, shorebird
diversity was highest, followed by dabbling ducks/geese/coots, and diving ducks. Land
"~ species, in contrast to water species, can rely on water habitats (e.g., salt marsh), but also
«- utilize a wide variety of transitional and upland habitats. Land species were dominated by
^ passerines or perching birds.
•" Bird abundance was highest from July 1994 through April 1995 (Table 3.2). The large
^ number of birds during this time demonstrates seasonal use of the lagoon by fall, winter,
and spring migrants. The populations during these months were comprised mainly of
<M waterfowl including Bufflehead, Scaup, and Ruddy Duck, as well as shorebirds such as
_ Semipalmated Plover, Black-bellied Plover, and Least and Western Sandpiper (Appendix
A.1).
M
_ The east inner lagoon had the largest number of birds during all surveys, followed by the
outer, west inner, and middle lagoon sections (Table 3.3). The east inner lagoon offers an
"" assortment of habitats including intertidal flat, open water, pickleweed salt marsh, salt
— panne, and seasonal ponds. This combination of habitats is not found elsewhere in the
^ lagoon. The intertidal flat in the east inner lagoon was the most heavily used habitat of the
entire lagoon. Shorebirds, gulls, coots, and dabbling and diving ducks comprised most of
— the bird community in the east inner lagoon. On outgoing and low tides, shorebirds
^ foraged for invertebrates, and herons and egrets foraged in the shallows for invertebrates
and/or fish; these birds moved to nearby salt marsh and salt panne to loaf at high tides.
— In contrast, gulls, dabbling ducks, coots, and a small number of terns and skimmers used
mm
„, MEC Analytical Systems, Inc. 25
" AGUA HEDIONDA LAGOON September 1995
m
* the exposed intertidal flat and sediment delta principally for loafing. The ducks and coots
feed on vegetation and/or subtidal invertebrates, and gulls are scavengers.
m The pickleweed salt marsh in the east inner lagoon provided nesting and foraging habitat
for the State Endangered Belding's Savannah Sparrow, a year round resident. The salt
panne/salt marsh complex also was used by a small number of nesting American Avocet
"• and Black-necked Stilt (Reconnaissance Survey, Appendix A. 1).
In contrast to the east inner lagoon, the outer lagoon is dominated by open water,
"" aquaculture racks, rip rap, and, at extreme low tide, a sandbar. Of these habitats, the open
_ water and aquaculture racks were used the most. Large numbers of pelicans, cormorants,
and gulls loafed on the racks, with some gulls and a small number of diving ducks and
""* grebes foraging in the open water. The sandbar was used for loafing by gulls.
ta The west inner lagoon is composed primarily of open water, with narrow bands of bank and
intertidal flat, beach, rip rap, and two sandbars. The beach, rip rap, and some of the
— intertidal flat, particularly that which is hard and compacted, were not valuable bird habitats.
». The open water and some small areas of intertidal flat, however, offered the most
productive habitats for a variety of birds (Appendix A.3). Diving and dabbling ducks, as
"" well as grebes, were commonly observed foraging in the open water. Diving ducks feed
M on subtidal invertebrates and vegetation, dabbling ducks feed primarily on vegetation, and
grebes eat fish and invertebrates. The sandbars had some limited use for loafing gulls and
"~ shorebirds.
The middle portion of the lagoon had the fewest number of birds (Tables 3.2 and 3.3). This
""" section of the lagoon consists of open water, a large centrally located sandbar, rip rap, and
"" a small band of intertidal flat and bank. Similar to the west inner lagoon, much of the
^ intertidal flat and bank is hard and compacted and consequently offers marginal foraging
"" habitat for shorebirds. A small number of diving ducks frequented the open water, and
*" some shorebirds were observed on the intertidal flat (Appendix A.3). Utilization of the
_ sandbar was limited, and was used mainly by loafing gulls and shorebirds.
"~ 3.2.2 Human Use and Disturbance
Aqua Hedionda is a recreational lagoon. Recreational fishing, ghost shrimping, and jet and
""" water skiing are permitted. Although fishing and shrimping are allowed throughout the
_ lagoon, only the west inner and a small section of the east inner are open to jet and water
^ skiing. What impacts, if any, recreational use of the lagoon has on the bird community is
"" difficult to assess. The jet and water skiing facility is open for only a portion of the year.
— During some surveys water skiing boats were observed flushing birds out of the water and
^ off the sandbars in the west inner lagoon and off the exposed delta (bar) in the east inner
lagoon. The overall effect of this or other types of recreation on the number and
— distribution of birds in the.lagoon is unknown.
MEC Analytical Systems, Inc. 26
AGUA HEDIONDA LAGOON September 1995
Table 3.1. Summary of total number of species and percent composition by bird category at
Agua Hedionda Lagoon for monthly surveys from June 1994 through June 1995.
Bird Category Number of Species Percent Composition
Water Species
Shorebirds
Dabbling Ducks/Geese/Coots
Diving Ducks
Grebes
Gulls
Terns/Skimmers
Egrets/Herons
Cormorants/Pelicans
Loons/Mergansers
Osprey
Kingfisher
Total
21
9
7
5
5
4
4
2
2
1
1
61
25.9
11.1
8.6
6.2
6.2
4.9
4.9
2.5
2.5
1.2
1.2
75.2
Land Species
Passerines
Hawks/Vultures
Total
16
6
20
19.8
4.9
24.7
MEC Analytical Systems, Inc.27
AGUA HEDIONDA LAGOON September 1995
Table 3.2. Summary of total abundance of birds by month in different sections of Agua
Hedionda Lagoon for surveys from June 1994 through June 1995.
Survey
June 1994
July 1994
August 1 994
September 1994
October 1994
November 1994
December 1994
January 1995
February 1995
March 1995
April 1995
May 1995
June 1995
Outer Lagoon
ns
ns
37
80
82
1129
162
87
42
45
84
64
126
Middle
Lagoon
ns
ns
21
7
13
1
84
118
73
28
24
6
18
West Inner
Lagoon
ns
ns
17
12
17
251
496
223
471
224
116
25
28
East Inner
Lagoon
267
2712
925
1161
983
1904
649
957
676
648
859
115
151
Total
267
2712
1000
1260
1095
3285
1391
1385
1262
945
1083
210
323
ns = not sampled
MEC Analytical Systems, Inc.28
AGUA HEDIONDA LAGOON September 1995
Table 3.3. Summary of total abundance of birds by category in different sections of Agua
Hedionda Lagoon for monthly surveys from August 1994 through June 1995.
Bird Category
Cormorants/Pelicans
Kingfishers
Ospreys
Terns/Skimmers
Egrets/Herons
Loons/Mergansers
Grebes
Dabbling Ducks/Geese/Coots
Diving Ducks
Shorebirds
Gulls
Passerines
Doves
Hummingbirds
HawksA/ultures
Total
Outer
Lagoon
573
.
.
22
16
4
20
8
60
31
1196
8
.
.
.
1938
Middle
Lagoon
4
4
.
7
14
2
13
11
112
178
22
21
5
.
.
393
West Inner
Lagoon
20
6
3
18
28
.
121
286
441
687
237
33
.
.
.
1880
East Inner
Lagoon
25
.
3
119
79
2
62
984
793
5552
1120
263
14
2
10
9028
MEC Analytical Systems, Inc.29
AGUA HEDIONDA LAGOON September 1995
3.2.3 Special Status Species
Aqua Hedionda Lagoon is inhabited by a number of sensitive bird species, ranging from
Federally endangered to California species of special concern. The following discussion
focuses on endangered or threatened species encountered within the lagoon. All other
sensitive species are highlighted and included in the Appendix A.2 Tables.
The California Brown Pelican, listed as endangered by the federal government and the
State of California, can be found along the coast of San Diego County throughout the year.
At Aqua Hedionda, the largest number of Brown Pelicans consistently occurred in the outer
lagoon where the species used the aquaculture racks for roosting and loafing (Appendices
A.2 and A.3). The species was observed in other areas of the lagoon but in much smaller
numbers and at a much lower frequency.
The California Least Tern is listed as endangered by the federal government and by the
State of California. California Least Terns are a fairly common, but localized breeding
migrant in the County during spring and summer and are absent during fall and winter.
This species does not presently nest within the lagoon, but there is a seasonally active
colony at the adjacent Batiquitos Lagoon. During the surveys, a total of 15 California Least
Terns were seen (Appendix A.1), with 8 observed foraging and loafing in the inner lagoon.
The lagoon, does not appear to offer valuable foraging habitat to this species.
The Western Snowy Plover, a small shorebird, is listed as threatened by the federal
government and is a California Species of Special Concern. This species is a common
migrant and winter visitor and a fairly common, but localized, breeding resident in San
Diego County. Western Snowy Plovers have historically nested at Aqua Hedionda but
have not in recent years. Although the east end of the lagoon appears to offer useable
habitat, only six individuals were observed (in the east inner lagoon) during the study.
The Belding's Savannah Sparrow is a common, but localized resident in San Diego County
and is an obligate of pickleweed salt marsh. This passerine is a federal Category 2
Candidate species and is listed as endangered by the State of California. Belding's
Savannah Sparrows were observed only in the east inner lagoon, where expanses of
pickleweed salt marsh occur. The east inner lagoon supports a small population of this
species. The number of individuals increased during the March (15 individuals), April (13
individuals), and May (14 individuals) surveys (Appendix A.1), reflecting nesting activity in
this portion of the lagoon.
MEC Analytical Systems, Inc. 30
m AGUA HEDIONDA LAGOON September 1995
M 3.2.4 Historical Comparison
p» A complete comparison between recent survey results and historical bird information for
H the lagoon is somewhat difficult. Previous records are scant and variable in coverage and
little is known regarding the types of conditions when the surveys were conducted (e.g.,
*• high or low tide, time of day). This study is the first complete annual census of birds at the
H lagoon and thus, gives a more complete and comprehensive picture of the bird community
inhabiting the area.
p
• In general, the bird populations found at the lagoon have not changed significantly since
the 1970's. A total of 61 water associated species were identified during recent surveys
1 compared to the 55 reported by Bradshaw et al. (1976) and Recon (1976). Most of the
• abundant and common species such as Black-bellied Plover, Least and Western
Sandpiper, Marbled Godwit, Bufflehead, Ruddy Duck, and Western Grebe observed during
P past Audubon Christmas counts and Point Reyes Bird Observatory surveys have continued
** to be abundant and common to the area.
|j What has changed significantly over past years is the use of the lagoon by sensitive
species. In the past, the endangered California Least Tem nested on the salt panne at the
p east end of the lagoon. Nine pairs nested there in 1975 (Bradshaw et al. 1976). Off-road
L vehicular activities and predation led to nesting failures (Ultrasystems 1983), and the
species no longer breeds in the lagoon. Similarly, the threatened Western Snowy Plover,
P* once a breeding resident that was abundant in the lagoon (Bradshaw et al. 1975), is now
to only sporadically observed.
p- Another sensitive species, the Light-footed Clapper Rail, an endangered species, once
m inhabited the lagoon but has disappeared from the area over the years. The
disappearance of this species is due to disturbance, degradation and elimination of
•" suitable habitat (Bradshaw etal. 1976).
MEC Analytical Systems, Inc. 31
AGUA HEDIONDA LAGOON September 1995
3.3 Fish
Lagoons provide important habitat for coastal marine and resident fish. An important
aspect of bays and estuaries is that they may serve as nursery habitat for commercially
and recreationally important coastal species such as California halibut and diamond turbot.
In addition, fish in lagoons provide important forage for water-associated birds.
The fish surveys of the present study were conducted during two different seasons, spring
and summer. Water quality was good during both surveys, but there were differences
related to season and lagoon section. Temperatures ranged from 14.8 to 16.9 °C during
the spring and 20.8 to 24.8 °C in the summer. Temperatures were up to 4 °C warmer in
the inner lagoon during the summer than in the outer lagoon. Salinities ranged from 23 to
32.7 ppt, with the lower values in spring due to seasonal rainfall. Visibility was only about
2 to 4 ft (0.75 to 1.25 m) during the spring, probably due to rainfall runoff. Visibility was
higher in the summer with the Secchi disc being visible on the bottom throughout most of
the lagoon, with the exception of the inner lagoon where visibility was limited to about 4 ft
(1.25m).
Water quality data from the fish surveys are presented in Appendix B.1. Fish data also are
given in Appendix B. Density data are in Appendix B.2, total counts are presented in
Appendix B.3, and fish size data are given in Appendix B.4.
3.3.1 Species Composition, Density, and Distribution
A total of twenty-nine species of fish were found during the July and April surveys of Agua
Hedionda Lagoon (Table 3.4). Fewer taxa occurred in the outer compared to the middle
and inner lagoons. The species composition reflects the open lagoon conditions in that
several coastal marine species occurred in the lagoon. Some of the more abundant
marine species (Table 3.5) included anchovies (Engraulidae), silversides (Atherinidae),
spotted sand bass (Paralabrax maculatofasciatus), barred sand bass (P. nebulifei),
queenfish (Seriphus politus), shiner surf perch (Cymatogaster aggregata), kelpfish
(Heterostichus sp.), California halibut (Paralichthys califomicus), and diamond turbot
(Hypsopsetta guttulata). Estuarine fish such as California killifish (Fundulus parvipinnis),
gobies (Gobiidae), and pipefish also were collected.
Mean total densities ranged from 0.016 to 7.90 fish per square meter (Table 3.5, Appendix
B.2). Densities were lowest in the outer lagoon, intermediate in the middle lagoon, and
highest in the east inner lagoon. Few fish were collected in the west inner lagoon during
the summer survey, but moderate numbers were caught during the spring. Densities
generally were higher in April than July for all lagoon sections, and were especially high
in the east inner lagoon.
Silversides (topsmelt and juvenile atherinids) and gobies were the most abundant fish
caught during both surveys. The high densities in spring were due to recruitment of
juvenile atherinids (probably topsmelt) and gobies. Silversides were primarily caught in the
middle and east inner lagoon, with few collected in the west inner lagoon and none in the
MEC Analytical Systems, Inc. 32
AGUA HEDIONDA LAGOON September 1995
Table 3.4.List of species collected by beam trawl, beach seine, and otter trawl at Agua
Hedionda Lagoon for the July 1994 and April 1995 surveys.
Species
Mustelus califomicus
Gymnura marmorata
Engraulis mordax
Anchoa compressa
Engraulidae (< 50 mm)
Fundulus parvipinnis
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Syngnathus leptorhynchus
Syngnathus aullscus
Leptocottus armatus
Paralabrax clathratus
Paralabrax maculatofasdatus
Paralabrax nebulifer
Micropterus dolomieui
Umbrina roncador
Seriphus politus
Cymatogaster aggregata
Sphyraena argentea
Hypsoblennius gentilis
Heterostichus sp.
Heterostichus rostratus
Gobiidae
Cleveland/a ios
Acanthogobius flavimanus
llypnus gilberti
Quletula y-cauda
Gillichthys mlrabllls
Gobiidae (< 25 mm)
Citharichthys stigmaeus
Paralichthys califomicus
Pleuronlchthys ritteri
Hypsopsetta guttulata
Svmohurus atricauda
Common Name
Grey smoothhound shark
California butterfly ray
Northern anchovy
Deepbody anchovy
Anchovy (< 50 mm)
California killifish
Topsmelt
Atherinid (< 25 mm)
Pipefish, unid.
Bay pipefish
Barred pipefish
Staghom sculpin
Kelp bass
Spotted sand bass
Barred sand bass
Smallmouth bass
Yellowfin croaker
Queenfish
Shiner surfperch
California barracuda
Bay blenny
Kelpfish, juv
Giant kelpfish
Goby (unid.)
Arrow goby
Yellowfin goby
Cheekspot goby
Shadow goby
Longjaw mudsucker
Goby (< 25 mm)
Speckled sanddab
California halibut
Spotted turbot
Diamond turbot
California tonquefish
MEC Analytical Systems, Inc.33
v i t i f i f i r i r i r i r i r i i i • i • i iiii
1 Table 3.5.Mean total density per m2 of dominant taxa and total number of species of fish collected by beam trawl, beach
seine, and otter trawl in different sections of Agua Hedionda Lagoon for the July 1994 and April 1995 surveys.0§
!
wI
Species
Engraulis mordax
Anchoa compressa
Fundulus parviplnnis
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Syngnathus leptorhynchus
Syngnathus auliscus
Leptocottus armatus
Paralabrax maculatofasciatus
Seriphus politus
Cymatogaster aggregata
Hypsoblennius gentills
Heterostichus rostratus
Gobiidae
Clevelandia ios
Acanthogobius flavimanus
llypnus gilbert!
Quietula y-cauda
Gillichthys mirabllis
Qobiidae (< 25 mm)
Parallchthys califomlcus
Hypsopsetta guttulata
Mean Total Density (m2)
Total Number of Species
Common Name
Northern anchovy
Deepbody anchovy
California kllllflsh
Topsmelt
Atherinid (< 25 mm)
Pipefish, unid.
Bay pipefish
Barred pipefish
Staghom sculpin
Spotted sand bass
Queenfish
Shiner surfperch
Bay blenny
Giant kelpfish
Goby (unid.)
Arrow goby
Yellowfln goby
Cheekspot goby
Shadow goby
Longjaw mudsucker
Goby (< 25 mm)
California halibut
Diamond turbot
July 1994
Outer
Lagoon
0.0018
0.0013
0.0004
0.0007
0.0113
0.0013
0.0013
0.0013
0.0013
0.0275
11
Middle
Lagoon
0.0060
0.0020
0.0180
0.9720
t
0.0068
0.0020
0.0040
0.0200
0.0016
0.0236
0.0040
0.0100
.
0.0040
,
0.0148
0.0220
1.1148
15
West
Inner
Lagoon
0.0060
0.0580
0.0013
0.0340
f
0.0020
0.0080
0.0102
0.0321
0.0028
L_ 0.0060
0.0580
.
t
,
0.0113
0.0022
0.2504
15
East
Inner
Lagoon
0.0320
0.0040
0.0600
1.2600
0.0020
0.0024
0.0020
0.5976
0.0040
0.0360
0.0980
0.0020
0.0080
0.0020
2.1220
16
April 1995
Outer
Lagoon
,
.
t
,
m
.
0.0017
0.0117
0.0021
.
0.0159
4
Middle
Lagoon
0.1220
0.7620
0.0920
0.0380
0.0697
0.0783
0.0180
0.0357
0.0520
0.0100
0.0260
0.0100
0.0400
0.1440
0.0527
0.1050
1.6580
18
West
Inner
Lagoon
.
0.0620
0.0480
0.1580
0.0060
t
0.0080
0.0020
0.0018
t
..
t
0.0380
0.0760
0.0020
0.0080
0.4292
0.0040
0.0440
0.8974
15
East
Inner
Lagoon
0.0020
0.0080
0.1400
3.2380
0.0060
0.0260
t
0.0140
0.1880
0.2200
t
0.0540
0.0420
3.8160
0.0040
0.1460
7.9040
14
1
1
™ AGUA HEDIONDA LAGOON September 1995
m
M outer lagoon. Topsmelt often is a dominant member of southern California lagoons and
bays. They attach their eggs to aquatic vegetation such as eelgrass (Frey 1971), and high
** abundances commonly occur in lagoons when aquatic vegetation is prevalent. Larvae are
" known to school in open shallow waters (Emmett et at. 1991), and this may relate to the
high abundances of juvenile atherinids in the east inner lagoon. The highest abundance
5 of juvenile atherinids was collected at beach seine station S5 (Appendix B.2), located at
the far end of the lagoon where the maximum depth is -2 ft MSL
m Gobies were found in all sections of the lagoon during both surveys, although densities
were highest for the east inner lagoon in April. Five species of goby were identified, the
p most abundant being arrow goby and yellowfin goby. Arrow gobies (Clevelandia ios) were
^ found in all sections of the lagoon, but were most abundant in the middle and inner lagoon
sections. They are most closely associated with muddy substrates (Brothers 1975).
m
H Yellowfin gobies (Acanthogobius flavimanus) were most abundant in the inner lagoon.
This species is an introduced species that can displace native species, particularly other
m gobies and sculpins (Usui 1981; Cross and Allen 1995).
m
After silversides and gobies, diamond turbot were the next most abundant fish. This
p species was found in the middle and inner lagoon only, and in higher numbers in April
m compared to July. Most of the fish collected in April were juveniles (Appendix B.4).
""" California halibut occurred in low abundances in all sections of the lagoon, and had
m approximately similar abundances in July and April (Table 3.5). More were caught in the
middle compared to the outer and inner lagoons.
«• 3.3.2 Sensitive Species
"" The federally endangered tidewater goby (Eucyclogobius newberryi) once occurred in
"" Agua Hedionda Lagoon. This species was not collected during the July 1994 or April 1995
^ surveys. It is possible that the historical record may pre-date the construction of the lagoon
"" (C. Swift, personal communication, 1994). The tidewater goby inhabits brackish waters,
*" and would not be expected in the marine waters of the lagoon.
3.3.3 Historical Comparison
_ Water quality characteristics of the lagoon were similar to that reported in previous studies
(Bradshaw and Estberg 1973) in that temperatures were bit warmer, salinity was more
** variable, and visibility was lower in the inner lagoon compared to the outer and middle
— lagoons.
*"" Twenty-nine species of fish were collected during July 1994 and April 1995 surveys of
p- Agua Hedionda Lagoon, which is generally lower than previous reports. Bradshaw and
^ Estberg (1973) listed a total of 22 species from one survey with beam trawls, interviews
with fishermen, and observations. Bradshaw et al. (1976) reported a total of 42 species
— from occasional surveys and from intake screen collections of the power plant. Recon
la*
M MEC Analytical Systems, Inc. 35
«• AGUA HEDIONDA LAGOON September 1995
urn
m (1976) noted 44 species. SDG&E (1980) reported 54 species from monthly trawl, beach
seine, and gill net collections. It is not known to what extent variations among reports may
m relate to sampling effort and methodology versus changes in fish utilization of the lagoon
•I over time.
* In the present study, more fish were found further from the inlet as numbers were greater
(i in the east inner lagoon. SDG&E (1980) also found that the highest abundances of fish
occurred in the inner lagoon.
IflJ
** Species composition in 1994 and 1995 was similar to that of previous studies in that the
lagoon is utilized by coastal marine and estuarine fish. However, there are some notable
2 differences. Yellowfin goby, which were common in the inner lagoon during the 1994 and
™ 1995 surveys, have not been previously reported from the lagoon.
L The abundances of California halibut in the present study were lower than in the past. In
addition, the distribution of the species in the lagoon seems to have changed. California
m halibut were mainly caught in the middle lagoon in the present study. California halibut
m were one of the most abundant species reported by Bradshaw and Estberg (1973), and
were only collected in the inner lagoon during their survey. Kramer (1990) documented
PI that Agua Hedionda Lagoon was an important nursery ground for California halibut during
ta 1987 and 1988, and reported highest densities in the inner and middle lagoons.
-» Recent low abundances of California halibut in the lagoon have been confirmed by the
n California Department of Fish and Game (CDFG), who has been conducting bimonthly
surveys for halibut in four embayments in southern California, including Agua Hedionda
'- Lagoon, since May 1994. They use a beam trawl for their surveys, and have rarely caught
*» more than one halibut per trawl (C. Valley, CDFG, personal communication, 1995).
"~ 3.4 Benthic Invertebrates
Organisms living on or within aquatic sediments comprise the benthos. Invertebrates that
"™ burrow or anchor within the sediment are termed infauna. These small animals, whose
*• sizes range from microscopic to about 2 in were collected by hand cores in the subtidal
_ stratum. Macroinvertebrates are larger and typically reside at or near the sediment
surface; they were collected by beam trawl. Benthic infauna and macroinvertebrates are
ta" a major food resource of bottom-feeding fish and diving birds. Invertebrates inhabiting
_ shallows also are fed upon by wading birds and shorebirds.
""* A variety of benthic invertebrates live near, on, or in the subtidal sediments of Agua
,~ Hedionda Lagoon. A total of 143 taxa were collected by beam trawls and 76 taxa were
collected by cores, with a combined total of 191 different taxa for both gear types from the
*" July 1994 and April 1995 surveys. Results of the July 1994 and April 1995
— macroinvertebrate surveys, and the April 1995 infauna survey are presented separately
below.
MEC Analytical Systems, Inc. 36
m AGUA HEDIONDA LAGOON September 1995
*• Benthic data from the field surveys are given in Appendix C. Density and total counts of
macroinvertebrates are presented in Appendix C.1 and Appendix C.2, respectively.
** Sediment data from the infauna cores are in Appendix C.3. Density data of benthic infauna
** are in Appendix C.4, and biomass of major taxonomic groups of infauna are given in
Appendix C.5.
^M
* 3.4.1 Species Composition, Density, and Distribution of Macroinvertebrates
p A total of 143 invertebrate taxa were collected with beam trawls for both the July and April
surveys. The number of species and density of macroinvertebrates were highly variable
among individual trawls. There were 3 to 80 species collected per trawl, with total densities
E ranging from 0.05 to 6.8 individuals per square meter (Appendix C.1).
p Generally, more species were collected in the outer and middle lagoon sections, as
H compared to the east inner lagoon during both the spring and summer surveys (Table 3.6).
in July 1994, more species were collected in the west inner lagoon than in the east inner
p lagoon. However, similar numbers of species were collected in April 1995 in the west and
m east inner lagoon, and those numbers were lower overall than those collected in the middle
and outer lagoons.
m
ta Abundances did not follow any clear pattern. Although densities of macroinvertebrates
were fairly stable in the middle lagoon for the two surveys, large survey differences were
"" seen for the other lagoon sections. Highest densities, due primarily to amphipods and
tm bubble snails, were collected in the west inner lagoon during the July or summer survey.
Mean densities were intermediate in the middle and outer lagoons, and were substantially
p" lower in the east inner lagoon. In contrast, mean densities were highest in the east inner
M lagoon during the April or spring survey, and lowest in the west inner and outer lagoons.
Mean densities in the middle lagoon were fairly stable between surveys.
— The most abundant macroinvertebrates included the cockle (Laevicardium substrlatum)',
the mussel (Musculista senhousi); bubble snails (Acteocina inculta, Bulla gouldiana,
""" Haminaea vesicula); mud dwelling snails (Alia carinata, Nassarius tegula); amphipod
"• crustaceans (Amphithoe spp., Corophium spp., Ericthonius brasiliensis, Hyale sp.,
^ Podocerus spp.); isopod crustaceans (Paracerceis sculpta); mysids; and shrimp (Crangon
"~ nigromaculata, Hippolyte californiensis).
w The species assemblages differed somewhat among lagoon sections. The cockle (L.
substriatum) was more abundant in the outer and middle sections of the lagoon than in the
"" inner lagoon. This is consistent with previous studies, and may relate to sediments being
... sandier in the outer and middle lagoon (Bradshaw and Estberg 1973). The mussel M.
senhousi, which is an introduced species that may outcompete native clams in areas
"* where it becomes established, was collected in relatively high densities in the east inner
_ lagoon during both surveys. This species was not reported during previous surveys of the
lagoon (Bradshaw and Estberg, 1973; Bradshaw et al. 1976). Crustaceans were
"" seasonally abundant during the July 1994 summer survey throughout much of the lagoon
— except for the east end, where they were collected in low abundances. Many of the
^ MEC Analytical Systems, Inc. 37
1 ) I I I 1 I I I I I I I I I 1 ii ii mm t i ii • i till
I
Table 3.6. Mean total density per m2 of dominant taxa, and total and mean number of species of macroinvertebrates collected by
beam trawl in different sections of Agua Hedionda Lagoon for July 1994 and April 1995 surveys.
Species
Crepldula onyx (MO)
Alia carinata (MO)
Nassartus tegula (MO)
Acteocina Inculta (MO)
Su//a gouldiana (MO)
Haminaea vesicula (MO)
Musculista senhousl (MO)
Laevicardium substriatum (MO)
Te///na sp. B (SCAMIT) (MO)
Tfteora /ubrfca (MO)
Mysida (CFt)
Paracarceis sculpta (CR)
Ampithoe spp. (CR)
Corophlum spp. (CR)
Ericthonlus braslllensis (CR)
Hya/esp. (CR)
Podocerus spp. (CR)
Periclimenes Infrasplnus (CR)
Hippolyte califomlensls (CR)
Crangon nlgromaculata (CR)
Pagurus spp. (CR)
Hamigrapsus oregonensls (CR)
Dendraster excentricus (MP)
TOTAL
Number of species
Mean number of species
July 1994
Outer Lagoon
0.0680
t
0.0160
0.0040
t
0.7330
.
0.0020
.
0.0757
0.0060
.,0.0120
0.0080
0.0560
.
..
0.0673
1.5050
81
45
Middle
Lagoon
0.0053
0.0213
0.0533
t
0.0433
0.0080
0.1460
t
0.0080
0,0767
0.0173
0.1920
1.0187
0.1013
0.0027
0.1533
t
0.0447
.
2.0360
38
14
West Inner
Lagoon
0.0121
0.0750
t
0.6410
0.0090
0.0571
0.0033
0.4083
0.2000
0.1617
0.2467
0.9033
0.9200
0.0700
0.1557
0.0300
3.9869
30
14
East Inner
Lagoon
0.0650
0.0240
0.0100
0.1850
0.0020
0.0040
0.0080
0.0050
t
0.0310
0.5300
0.0760
1.0290
19
7
April 1995
Outer Lagoon
0.0250
0.0500
0.0025
0.0325
0.0250
0.2050
0.0150
0.0275
0.0050
0.0025
.
.
0.5250
39
24
Middle
Lagoon
0.0272
0.0967
0.1794
0.0122
1.0928
0.0067
0.0022
0.3894
0.0256
t
0.0183
0.0689
0.0022
0.0956
2.2694
57
27
West Inner
Lagoon
0.0025
0.0225
0.0050
0.0275
0.0150
0.1325
0.0450
0.0300
0.1325
0.0025
0.0100
0.5175
24
16
East Inner
Lagoon
0.2700
0.0300
2.8100
0.2200
0.1900
0.1000
0.0050
0.0850
0.1100
0.0050
0.0250
4.0650
26
18
o
§
I
!?
Note: CR=crustacean, MO=mollusk, MP=minor phyla, PO=polychaete or oligochaete
CD
m
m
AGUA HEDIONDA LAGOON September 1995
abundant amphipod and isopod species have previously been reported to be common in
the eelgrass beds of the lagoon (Bradshaw et al. 1976). The shrimp H. californiensis also
is common in eelgrass beds (Morris et al. 1980). The lower abundances of these
crustaceans in the east inner lagoon probably relates to the relatively poor development
of eelgrass beds in that section of the lagoon.
3.4.2 Species Composition, Density, and Distribution of Infauna
A total of 76 infaunal taxa were collected during the April survey. The number of species
ranged from 2 to 25 per core, with total densities of 382 to 18,462 individuals per square
meter. With the exception of stations with a high sand content (> 90% sand), there was
little difference in assemblages from sediments ranging from 8 to 88% sand. Sediment
data are presented in Appendix C.3, and count data by station are presented in Appendix
C.4. Number of species, density, and biomass differed among vegetated and non-
vegetated habitats and in areas of the lagoon where sedimentation has occurred.
Generally, benthic populations were more diverse and abundant in the eelgrass beds than
in non-vegetated sediments (Table 3.7). A notable exception was the populations in the
eelgrass beds of the east inner lagoon, which are sparsely developed. There was little
difference between the benthic community within or outside the eelgrass beds in that
section of the lagoon. Other exceptions include areas where there has been deposition
of littoral sands. The sand bars in the west inner lagoon are covered with eelgrass. On
average, there were fewer species and individuals in the eelgrass beds on these bars than
in most of the other eelgrass beds sampled in the outer, middle, and west inner lagoon
sections. A final example concerns the eelgrass stations in the outer lagoon, which had
substantially different benthic community characteristics (Appendix C.4). Station 1, in
contrast to Station 2, had a poorly developed benthic infauna. Station 1 had one of the
highest sand contents (93%) of any of the stations sampled. The high sand content at this
station and the presence of the large sand bar on the west side of the lagoon provide
evidence that there has been deposition of littoral sands at that station. Deposition of
littoral sands is a constant problem for the outer lagoon, and maintenance dredging is
conducted outside the eelgrass beds every one to two years.
Benthic populations also were less developed in non-vegetated areas where there was
littoral sand deposition. For example, there were few species and individuals of benthic
infauna on the sand bar in the middle lagoon. The benthic infauna also was depauperate
at Station 9 in the channel of the middle lagoon, where the sand content exceeded 90%
(Appendices C.3 and C.4).
Non-vegetated sediments with a lower sand content (8-88%) had moderate numbers of
species and individuals in all lagoon sections. However, fewer species were collected on
the sediment delta (bar) at the eastern end of the inner lagoon. Benthic assemblages at
Stations 23 and 24 (Figure 2.3), which were located at depths of about -3 ft MSL, were
more similar to those at deeper depths in the inner lagoon, than to Stations 25 and 26,
which occurred at depths less than -2 ft MSL. Stations 25 and 26 had the lowest number
of species and individuals of any of the sampled stations.
MEC Analytical Systems, Inc. 39
1 1 i « I 1 I 1 I \ I 1 I I • I •1 11 • i mm
o>
i
Table 3.7. Mean total density per m2 of dominant taxa and total number of species of benthic infauna collected by cores in different
habitats and sections of Agua Hedionda Lagoon for the April 1995 survey.
Species
Nematoda (MP)
Schlstomeringos rudolphl(PO)
Leltoscoloplos pugettensls (PO)
Polydora llgnl (PO)
Polydora nuchalls (PO)
Prlonospio haterobranchla (PO)
Apoprionosplo pygmaea (PO)
Splophanes mlsslonensls (PO)
Pseudopolydora paucibranchiata (PO)
Diplodmis sp. (PO)
Capttella "capitata" (PO)
Notomastus hemipodus (PO)
Medlomastus sp. (PO)
Mediomastus amblseta (PO)
Oligochaeta (PO)
Caecum callfomlcum (MO)
Acteoclna Inculta (MO)
Laevlcardium substriatum (MO)
7"e///na sp. (MO)
Ertcthonlus brasiliensis (CR)
Qrandldlerella laponlca (CR)
PontoQenela rostrata (CR)
Phoronida (MP)
Mean Density (m2)
Total Number of Species
Mean Number of Species
Mean Biomass (gm/m2)
Outer Lagoon
Eelgrass
Bed
3374
64
318
764
64
955
318
•- - -•
446
191
828
637
64
m
10250
29
17
40
Non-Veg.
t
127
64
.
.
382
446
382
t
255
t
382
382
.
t
t
127
3310
16
10
30
Middle Lagoon
Eelgrass
Bed
2165
700
637
191
127
1719
6048
(
127
191
318
64
13305
22
14
66
Non-Veg.
t
t
955
255
509
891
573
.
64
64
64
t
f
64
4265
18
9
22
Bar
64
.
-
t
t
891
127
t
t
64
.
t
.
1273
6
4
1
West Inner Lagoon
Eelgrass
Bed
64
2101
p
t
255
318
64
1401
64
573
5411
382
.
12032
23
15
73
Non-Veg.
t
828
159
32
286
159
32
95
64
159
64
32
32
32
223
2833
24
10
19
Bar
1019
191
64
.
.
637
127
4902
.
64
64
.
318
.
8340
18
11
48
East Inner Lagoon
Eelgrass
Bed
64
64
1464
.
64
64
127
.
.
64
637
64
2737
11
6
4
Non-Veg.
191
127
509
127
64
.
509
.
1910
64
64
4138
16
10
20
Bar
191
382
637
64
668
2260
12
5
10
1
§§
Note: CR=crustacean, MO=mollusk, MP=minor phyla, PO=polychaete or oligochaete Ol
AGUA HEDIONDA LAGOON _ September 1995
IP
** The most abundant infaunal invertebrates (Table 3.7) included nematodes, phoronids,
oligochaetes, and polychaete worms (Capitella capitata, Mediomastusspp., Leitoscoloplos
1"; pugettensis, Polydora ligni, Spiophanes missionensis). Amphipod crustaceans (Ericthonius
" brasiliensis, Grandidierellajaponica), cockles and clams (Laevicardium substriatum and
Tellina sp.), and bubble snails (Acteocina inculta, Haminaea visicula) also were common
in different areas of the lagoon.
The species assemblages reflected differences in lagoon habitats. Nematodes and
oligochaetes, which feed on organic matter (particularly vegetation), were most abundant
in the eelgrass beds and on the vegetated bar of the west inner lagoon. Cockles and
clams were most abundant in the outer lagoon where sediments are sandier. Amphipods
were most abundant in the eelgrass beds of the middle and inner lagoon. Phoronids were
most abundant on non-vegetated sediments in the inner lagoon.
3.4.3 Sensitive Species
The speckled scallop (Argopecten circularis), which is a protected species, was collected
from all three sections of the lagoon during 1972 (Bradshaw and Estberg 1973; reported
as Aequipecten aequisculcatus). The CDFG studied this species in the lagoon from 1984
to 1986. Large numbers were collected in 1984, but they had virtually disappeared by
1986 (Haaker et al. 1986). Only 1 individual was collected in the middle lagoon during the
July 1994 survey.
3.4.4 Historical Comparison
The high number (1 91) of infauna and macroinvertebrate taxa (76 from cores) observed
in the present study indicates that the benthic fauna is as or more diverse than it was in the
1970's. Bradshaw and Estberg (1973), sampled 36 stations in all three sections of the
lagoon using a modified Hayward orange peel grab, and reported over 70 species.
Bradshaw et al. (1 976) provided a more expanded list with over 1 50 species in the lagoon,
with about 1 00 species from subtidal habitats.
Despite the similarity in overall diversity between the present and historical studies, there
are differences now in the benthic fauna that were not reported earlier. Bradshaw and
Estberg (1973) documented that benthic species diversity, density, and biomass were
similar throughout the lagoon. The only differences they noted concerned the species
assemblages, which generally were dominated by clams in sandy sediments and by worms
in sediments with a higher silt content. During the present study, these same patterns in
species assemblages were noted, but more importantly, there were differences among
lagoon sections and habitats, particularly in sediment depositional areas. In general, there
has been a degradation of benthic habitat in areas that have received substantial
deposition of littoral sands or terrigenous sediments. The sandbar in the middle lagoon
supported a reduced fauna. The sandbars in the west inner lagoon, which are covered
with eelgrass, had fewer species and numbers of individuals than other eelgrass beds in
that section of the lagoon and in the middle and outer lagoon.
MEC Analytical Systems, Inc. 41
»• AGUA HEDIONDA LAGOON _ September 1995
m
m The east end of the inner lagoon has undergone substantial infilling from runoff since its
original construction, and since the 1970's when the last benthic surveys were conducted.
*" Results of the present study indicated that the benthic fauna of the eelgrass beds in the
m east inner lagoon was less diverse and abundances were lower as compared to eelgrass
beds in other lagoon sections. Furthermore, there were fewer species and individuals as
P depths became shallower on the sediment delta at the east end.i
m
m:m
m1
MEC Analytical Systems, Inc. 42
** AGUA HEDIONDA LAGOON September 1995
m
m 4.0 SUMMARY
PI
il Tidal action drives the circulation in the lagoon, and water quality generally was good
throughout the lagoon. However, visibility was less, and temperature and salinity were
p more variable in the inner lagoon where there has been deposition of fine sediments and
II depths are shallower. There was evidence of reduced habitat quality in areas where
substantial sedimentation has occurred.
m
H Ecological resources reflected the tidal conditions of the lagoon, in that marine species
comprised a substantial proportion of the fish and benthic species assemblages, and
m eelgrass was an important component of the habitat. Furthermore, water associated birds,
If particularly shorebirds that forage on intertidal flats, were dominants at the lagoon. There
were variations in these resources among the different lagoon sections and habitats.
P
• Eelgrass beds were best developed in the outer and middle lagoons. Eelgrass was limited
to shallower depths in the inner lagoon, with the densest bed occurring on the sandbars
H in the west inner lagoon. Eelgrass beds along the shoreline of the inner lagoon were less
• dense and more patchy in distribution. Eelgrass beds comprised the most valuable habitat
for benthic organisms in the lagoon. More species and higher densities generally occurred
m in these vegetated sediments. Exceptions were in areas where there has been substantial
• sediment deposition such as the sandbars in the west inner lagoon and near the sandbar
in the outer lagoon. Sedimentation and associated turbidity in the east inner lagoon
probably has contributed to the reduction in eelgrass and its present distribution being
• restricted to shallow depths in that section of the lagoon.
The sandbars in the outer lagoon, middle lagoon, and west inner lagoon, which become
m exposed during low tides, were suboptimal habitats. Few benthic resources were
«. associated with these areas, and they were of limited use as loafing areas for birds. The
sediment delta that has formed over the years in the east inner lagoon ranged from poor
** to moderate benthic habitat depending on the degree of deposition. There were fewer
•- benthic species and individuals as depths on the del^a became shallower.
Bird use was very high in the east end of the inner lagoon. The east inner lagoon offers
— and assortment of habitats ranging from intertidal flats, salt marsh, salt panne, and
a, seasonal ponds, which in combination are found nowhere else in the lagoon. The intertidal
flat at the east end was the most heavily used habitat of the entire lagoon, with high
*"• abundances of foraging shorebirds. Gulls, coots, and ducks loafed on the sediment delta
— and intertidal flats, when not foraging in the open water. The intertidal flat grades into the
sediment delta, which becomes exposed at low tide. Shorebirds were commonly observed
""" foraging on the sediment delta when it was exposed. Benthic infaunal species number
«. and abundances were low on the sediment delta; benthic fauna were not sampled on the
intertidal flats. Given the high shorebird abundances on the intertidal flats, it would be
**" interesting to compare benthic populations on the flats to those on the sediment delta to
*• determine relative value as foraging habitat to shorebirds. Shorebirds moved to salt marsh
and salt panne habitats for loafing during high tides. The proximity of these loafing habitats
MEC Analytical Systems, Inc. 43
" AGUA HEDIONDA LAGOON September 1995
m
«* to foraging habitat probably contributes to the utilization of the flats by shorebirds at the
east end of the lagoon.
• Fish were most abundant in the east inner lagoon where shallow depths and warmer
temperatures appeared to provide more optimal habitat for juvenile silversides and gobies.
B Wading birds such as herons and egrets, which feed on fish and invertebrates, were more
™ commonly observed in the east inner lagoon.
ig The lagoon provided limited to moderate habitat for special status species or species of
special interest. California Brown Pelicans loafed on the aquaculture racks of the outer
_ lagoon. A small population of Belding's Savannah Sparrow occurred in the salt marsh at
II the east end of the lagoon. California Least Terns and Western Snowy Plover, which used
to nest at the lagoon, were rarely observed. Only one live speckled scallop was collected
• in the middle lagoon. California halibut were collected in low abundances, with most
H collected from the middle lagoon.
p Species diversity in the present study was higher or lower than previous reports depending
HI on the resource. A total of 61 water associated bird species were observed in the present
study as compared to 55 from past studies. A total of 29 taxa of fish were collected, which
m was lower than most other reports of 42 to 54 species. A total of 191 taxa of benthic
• invertebrates ranging in size from the small infauna to larger macroinvertebrates were
collected, which was higher than the over 150 species reported previously.
p
M Ecological resources, in general, were similar to previous studies of the lagoon, although
there were some notable exceptions. Most importantly there has been a reduction in the
m eelgrass habitat. There also has been a reduction in the use of the lagoon by endangered
*m species of birds such as California Least Tem and Western Snowy Plover. California
halibut abundances were lower, particularly in the inner lagoon, as compared to previous
"* studies. Benthic resources have been altered in areas where there has been substantial
*• sediment deposition. Additionally, there are some introduced species that now occur in
the inner lagoon that were not previously reported from the lagoon. These include
*" yellowfin goby, and the mussel Musculista senhousi. The occurrence of introduced
*•* species is of some concern because of their capacity to displace native species in areas
„,. where they become established.
MEC Analytical Systems, Inc. 44
AGUA HEDIONDA LAGOON September 1995
LITERATURE CITED
Hi Backman, T.W. and D.C. Barilotti. 1976. Irradiance reduction: Effects on standing crops
of the Eelgrass Zostera marina in a coastal lagoon. Marine Biology. 34:33-40.n
I* Bradshaw, J.S. and G.N. Estberg. 1973. An ecological study of the subtidal marine life of
Agua Hedionda Lagoon. Environmental Studies Laboratory of the University of San Diego.
ffl Submitted San Diego Gas and Electric Co., Part 1, 99 p.; Part 2,123 p.
Bradshaw, J.S. B. Browning, K. Smith, and J. Speth. 1976. The natural resources of Agua
B Hedionda Lagoon. U.S. Fish and Wildlife Service. Coastal Wetland Series #16.109 pp.
_ Brothers, E.B. 1975. The comparative ecology and behavior of three sympatric California
j| gobies. University of California, San Diego, Ph.D. Dissertation, 368 pp.
S Cross, J.N. and L.G. Allen. 1995. Fishes Chapter 9 in Ecology of the Southern California
Bight: A Synthesis and Interpretation. M.D. Dailey J.J. Reish, and J.W. Anderson (eds.).
University of California Press, Berkeley. 926 pp.
m
H Deile, N.W. 1994. Agua Hedionda Watershed dry weather storm water monitoring data.
City of Carlsbad, Utilities and Maintenance Department.
m Ellis, J.D. 1954. Final report: dredging Agua Hedionda Slough Encina Generating Station.
San Diego Gas and Electric.
jm
M Emmett, R.L., S.L. Stone, S.A. Hinton, and M.E. Monaco. 1991. Distribution and
Abundance of Fishes and Invertebrates in West Coast Estuaries, Volume II: Species Life
pi History Summaries. ELMR Rep. No. 8. NOAA/NOS Strategic Environmental Assessments
«•" Division, Rockville, MD> 329 pp.
*"" Frey, 1971. California's living marine resources and their utilization, California Department
**" of Fish and Game.
*" Haaker, P.L., J.M. Duffy, K.C. Henderson, D.O. Parker. 1988. The speckled scallop,
*" Argopecten circularis, in Agua Hedionda Lagoon, San Diego County, California. 32 pp.
Jenkins, S.A. and D.W. Skelly. 1988. An evaluation of the coastal data base pertaining to
""" seawater diversion at Encina Power Plant Carlsbad, CA. Submitted to San Diego Gas &
^ Electric.
"* Jenkins, S.A. and J. Wasyl. 1993. Numerical modeling of tidal hydraulics and inlet closures
*. at Agua Hedionda Lagoon. Submitted to San Diego Gas and Electric, Co.
MEC Analytical Systems, Inc. 45
m AGUA HEDIONDA LAGOON September 1995
m
H Kramer, S.H. 1990. Habitat specificity and ontogenetic movements of juvenile California
Halibut, Paralichthys californicus, and other flatfishes in shallow waters of Southern
p California. Southwest Fisheries Science Center, National Marine Fisheries Service, NOAA.
Leeds, C.T. 1953. Memorandum regarding development of Agua Hedionda Lagoon. San
p Diego Gas & Electric.
B Leighton and Associates. 1988. Report of test results and laboratory analysis, San Diego
Gas and Electric Encina Power Plant Dredge Material, Carlsbad, California. Project No.
4860085-02.m
• Lillevang, O.J. 1966. Coastal power generation; its relationship to beaches. Shore and
Beach: 34(2) :2-8.
W^II
™ MEG Analytical Systems, Inc. 1993a. Field investigations for lagoon dredging and chemical
analysis of sediments: data report. Submitted to San Diego Gas & Electric.
™m
MEC Analytical Systems, Inc. 1993b. San Dieguito Lagoon restoration project regional
_ coastal lagoon resources summary: Draft technical memorandum. Submitted to Southern
M California Edison Company.
m Morris, R.H., D.P. Abbott, and E.G. Haderlie (eds.). 1980. Intertidal Invertebrates of
U California. Standford University Press, Standford, California. 690 pp.
m Pike, P., SDG&E, personal communication, 1994.
H
Plumb, R.H. 1981. Procedures for Handling and Chemical Analysis of Sediment and
•» Water Samples. Technical Report EPA/CE-81-1, prepared by Great Lakes Laboratory,
ta State University College at Buffalo, Buffalo, N.Y., for the U.S. Environmental Protection
Agency/Corps of Engineers Technical Committee on Criteria for Dredged and Fill Material.
"" Published by the U.S. Army Engineer Waterways Experiment Station, CE, Vicksburg, Miss.
lM
Point Reyes Bird Observatory. 1992. Shorebird numbers in wetlands of the Pacific Flyway:
"" A summary of counts from April 1988 to January 1992.
ta>
RECON. 1976. Environmental impact report No. 329, Agua Hedionda specific plan.
*" Submitted to the City of Carlsbad.
Ma
Ritter, J.R. 1972. Cyclic sedimentation in Agua Hedionda Lagoon, Southern California.
"* Journal of the Waterways, Harbors and Coastal Engineering Division, Proceedings of the
*" American Society of Civil Engineers. 98(WW4): 597-602.
"™ Swift, C. Los Angeles National History Museum, fish section, personal communication,
1994.
MEC Analytical Systems, Inc. 46
M AGUA HEDIONDA LAGOON _ September 1995
iII Ultrasystems, Inc. 1983. Supplemental environmental studies. Submitted to City of
Carlsbad.
P
H U.S. Army Corps of Engineers (USACOE). 1973. Flood plain information: Agua Hedionda
Creek, Pacific Ocean to Buena San Diego County, California. Submitted to San Diego
pj County.
m
U.S. Army Corps of Engineers (USACOE). 1994. Reconnaissance report: Pacific coast
• shoreline, Carlsbad San Diego County, California.m
Usui, C.A. 1981 . Behavioral, Metabolic, and Seasonal Size Comparison s of an Introduced
B Gobiid Fish (Acanthogobius flavimanus) and a Native Cottid (Leptocottus armatus), from
Upper Newport Bay, California. M.S. Thesis, California State University, Fullerton, CA.
Valley, C. California Department of Fish and Game, personal communication, 1995.
Wells, P.E. and D.W. Price. 1989. Agua Hedionda Lagoon, San Diego County: Sanitary
m
m
survey 1985-1989. State Department of Health Services, Environmental Management
Branch.
MEC Analytical Systems, Inc. 47
•t'»'-r-j"«^fi '»* „ $*»*/•? v<t>;M-lt*t. „ ^,%-/'.-f'*,|k''L<->>"'•' 'i-Vt?1'-^ '-,* ."**>v' •• - .'' f'-^i^^^•^^g^^j^^iyilis^iii^i^^^i^^^^i
m
•
A.1 Total Abundances by Species and Survey
i i ii ii
Species
i i i r i r i r i i i i i i * a mm • i • i i i
Agua Hedionda Lagoon Bird Data
Total abundances by survey
Aug94
.
30
1
4
1
1
13
1
5
Sep94
.
58
6
3
10
9
t
t
t
1
Oct94
18
7
3
63
12
3
6
2
46
7
19
Nov94
3
26
6
124
29
1
2
.
.
Dec 9 4
2
8
9
6
65
16
3
3
4
3
23
9
Jan95
5
19
20
9
9
29
2
3
1
.
77
175
53
2
Feb95
7
17
3
4
1
14
4
1
10
3
51
56
Mar 9 5
12
18
1
1
2
29
2
4
6
53
16
Apr 9 5
1
7
5
35
10
1
1
7
14
33
2
1
May 9 5
27
4
1
2
10
.
2
11
.
Jun9(
52
6
2
1
20
21
8
12
1
1
300
10
25
25
21
80
11
Pacific Loon
Horned Grebe
Eared Grebe
Western Grebe
Clark's Grebe
Pied-billed Grebe
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Great Blue Heron
Green-backed Heron
Great Egret
Snowy Egret
Brant
Mallard
Gadwall
Northern Pintail
Green-winged Teal
Cinnamon Teal
American Wigeon
Northern Shoveler
Scaup spp.
Redhead
Canvasback
Lesser Scaup
Buf flehead
Surf Scoter
Ruddy Duck
Red-breasted Merganser
Turkey Vulture
Cooper's Hawk (CSC)
Red- tailed Hawk
Northern Harrier (CSC)
Osprey (CSC)
American Coot
Semipalmated Plover
Western Snowy Plover (FT, CSC)
Killdeer
Black-bellied Plover
Long-billed Curlew (FC3,CSC)
Whimbrel
Spotted Sandpiper
Greater Yellowlegs
Willet
Sandpiper, unidentified
Least Sandpiper
Dunlin
Western Sandpiper
Sanderling
Dowitcher spp.
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
55
1
83
134
147
1
1
1
59
121
2
70
1
8
94
4
93
12
3
26
8
2
1
104
,
19
104
3
1
2
58
363
84
5
t
51
4
101
.
27
98
4
1
1
43
601
65
49
22
1
62
110
6
18
45
1
2
2
38
99
45
296
.
6
1
1
1
119
23
40
2
24
16
483
1
125
80
1
52
2
71
550
1
2
1
1
111
62
53
4
66
2
15
145
8
1
83
25
46
1
3
68
63
22
5
342
13
4
1
1
46
10
4
12
1
5
44
116
28
165
1
3
30
51
1
4
4
1
14
4
576
1
.
3
1
2
1
1
2
5
1
2
2
i t i i i i i i i t i r i t i mm mm mm • i BI i ii
Species
Short-billed Dowitcher
Marbled Godwit
Common Snipe
American Avocet
Black-necked Stilt
Red-necked Phalarope
Western Gull
California Gull (CSC)
Ring-billed Gull
Bonaparte's Gull
Heermann's Gull
Forster's Tern
California Least Tern (FE,SE)
Caspian Tern
Black Skimmer (CSC)
Mourning Dove
Anna's Hummingbird
Belted Kingfisher
Black Phoebe
Northern Rough-winged Swallow
Barn Swallow
Cliff Swallow
Loggerhead Shrike (CSC)
Marsh Wren
Common Yellowthroat
Western Meadowlark
Red-winged Blackbird
House Finch
Savannah Sparrow
Belding's Savannah Sparrow(FC2,SE)
Lincoln's Sparrow
Song Sparrow
Common Raven
American Crow
Total
Aug94
16
Agua Hedionda Lagoon Bird Data
Total abundances by survey
Sep94 Oct94 Nov94 Dec 9 4 Jan95 Feb95 Mar 9 5 Apr 9 5 May95 Jun95
38
6
42
2
1
7
3
12
g
2
14
4
.
t
2
100
36
1
4
61
2
2
1
40
5
1
1
...... 2
1
•^ — — — ^.
1260
20
33
46
5
10
6
1
1
1
1
1
2
1
12
3
10
8
1
1095
50
9
2
1250
693
2
1
1
1
2
1
5
2
2
3285
61
17
4
83
29
27
2
5
.
1
1
2
t
.
7
s
4
.
•
1391
37 75
16 10
2 2
6 10
13 2
6 32
t
4
1
1 3
6
1
2
.
,
.
8
8
1385 1262
34
16
2
.
11
11
14
1
3
6
1
5
9
12
11
15
11
1
945
27
38
5
43
35
4
1
1
29
2
13
5
.
4
2
6
13
1
.
.
1083
17
38
9
10
6
18
5
5
5
14
1
16
210
5
23
9
98
1
1
5
5
2
2
12
4
5
10
6
2
5
4
323
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
m
m
myi^
| A.2 Counts by Lagoon Section and Habitat for
Each Survey
m
|g Agua Hedionda Lagoon Bird Data
Reconnaissance Survey
_ East Inner Lagoon
^ Total Abundances by Survey
Species JUN94 JUL94
H California Brown Pelican (FE, SE) 2
• White-faced Ibis (FC2, CSC) 2
Black-crowned Night Heron 1
B Great Blue Heron 1
Great Egret 1
Snowy Egret 115 6
Western Grebe 2 3EGadwall 3
Mallard 2
Black-bellied Plover 3
E Semi-palmated Plover 14 12
Killdeer 8 9
Whimbrel 2 6
Willet 10 32
B Greater Yellowlegs 2
Sandpiper, unidentified . 2560
Least Sandpiper 1
Western Sandpiper 3
H Dowitcher spp. . 30
• Marbled Godwit 8
American Avocet 20 20
m Black-necked Stilts 6
I California Gull (CSC) 6
I* Western Gull 1
Pointer's Tem 24
P* Bam Swallow 2
. Cliff Swallow 7
Black Phoebe 1
House Finch 2
'"* Lesser Goldfinch 4
ha Common Yellowthroat 2
Red-winged Blackbird 3 18
_ Belding's Savannah Sparrow (FC2, SE) 5 16
Song Sparrow 4
IM
TOTAL 267 2712
IP»
1^ Special Status Codes:
CSC = California Department of Rsh and Game, Species of Special Concern
FC2 = Category 2 Candidate for Federal listing
^ FE Listed as Endangered by the Federal Government
II SE = Listed as Endangered by the State of California
Pi
M
Agua Hedionda Lagoon Bird Data
Reconnaissance Survey
East Inner Lagoon
Counts by Lagoon Section and Habitat
m
HP
|
I
1i
m
IP
Hi
Habitat Shore
Aerial
Intertidal Rat East
Intertidal Flat East
Intertidal Rat East
Intertidal Rat East
Intertidal Rat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Rat East
Intertidal Flat East
Intertidal Rat East
Intertidal Flat East
Intertidal Rat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Rat East
Intertidal Flat East
Intertidal Flat East
Intertidal Rat East
Intertidal Rat East
Intertidal Rat North
Intertidal Flat North
Intertidal Rat North
Intertidal Rat North
Intertidal Rat South
Intertidal Flat South
Intertidal Flat South
Intertidal Rat South
Intertidal Rat South
Intertidal Flat South
Intertidal Flat South
Open Water South
Open Water South
Open Water South
Open Water South
Open Water South
Salt Marsh North
Salt Marsh North
Salt Panne North
Salt Panne North
Salt Panne North
Salt Marsh/Transitional North
Salt Marsh/Transitional North
Salt Marsh/Transitional North
Salt Marsh/Transitional North
Salt Marsh/Transitional South
Salt Marsh/Transitional South
Freshwater Marsh North
TOTAL
Species
Snowy Egret
Black-crowned Night Heron
Great Blue Heron
White-faced Ibis (FC2, CSC)
Great Egret
Snowy Egret
Gadwall
Mallard
Semi-palmated Plover
Killdeer
Whimbrel
Willet
Greater Yellowlegs
Least Sandpiper
Western Sandpiper
Sandpiper, unid.
Dowitcher
Marbled Godwit
American Avocet
Black-necked Stilts
California Gull (CSC)
Western Gull
Forester's Tern
Snowy Egret
Black-bellied Plover
Willet
American Avocet
Snowy Egret
Black-bellied Plover
Semi-palmated Plover
Killdeer
Willet
Sandpiper, unid.
California Gull (CSC)
Western Grebe
California Brown Pelican (FE, SE)
Forester's Tern
Bam Swallow
Cliff Swallow
Belding's Savannah Sparrow (FC2, SE)
Song Sparrow
Killdeer
Whimbrel
American Avocet
Cliff Swallow
House Finch
Lesser Goldfinch
Spong Sparrow
Black Phoebe
Common Yellowthroat
Red-winged Blackbird
JUN94
3
1
1
2
1
79
3
2
8
5
2
9
2
1
3
8
10+ 5 chicks
4 + 2 chicks
5
1
10
9
1
1
5
24
2
6
3
1
2
2
14
2
2
4 + 1 fledgling
2
5
2
4
2
1
2
3
267
JUL94
1
31
2325
30
12+ 5 chicks
1
5
1
235
16
9
5
3
18
2712
Special Status Codes:
CSC = Callntertidal Flatornia Department of Rsh and Game, Species of Special Concern
FC2 = Category 2 Candidate for Federal listing
FE = Listed as Endangered by the Federal Government
SE = Listed as Endangered by the State of California
r ..... i r ........ i r ..... i r ..... i r ..... i i ....... i r i r~i mm mm mm m.m i i i i i
Habitat Shore
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Acjuaculture racks West
Bank West
Bank West
Bank West
Bank West
Beach North
Beach South
Beach South
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
August 1994
Species
California Brown Pelican (FE,SE)
Snowy Egret
Mallard
Mourning Dove
Northern Rough-winged Swallow
Barn Swallow
California Brown Pelican (FE.SE)
Great Blue Heron
Western Gull
California Gull (CSC)
Ring-billed Gull
Killdeer
California Brown Pelican (FE,SE)
Western Gull
Great Blue Heron
Snowy Egret
Semipalmated Plover
Killdeer
Black-bellied Plover
Greater Yellowlegs
Willet
Sandpiper, unidentified
Least Sandpiper
Dowitcher spp.
Short-billed Dowitcher
Marbled Godwit
American Avocet
Western Gull
Forster's Tern
Caspian Tern
Great Blue Heron
Green-backed Heron
Great Egret
Whimbrel
Willet
Marbled Godwit
California Gull (CSC)
Semipalmated Plover
Killdeer
Spotted Sandpiper
Willet
Least Sandpiper
Western Sandpiper
Marbled Godwit
Inner
Lagoon, west
Outer Middle of Bristol
Lagoon Lagoon Cove
3
5
. «
24
1
5
1
1
.
* i
Inner
Lagoon, east
of Bristol
Cove
.
5
12
5
2
2
3
31
1
89
3
52
2
43
351
74
46
16
32
6
3
5
3
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
i i i i [ i f i f i i i r i r i i i i i t i r i i i i i i i i i i i
Habitat Shore
Intertidal Flat West
Intertidal Flat West
Other perches North
Other perches South
Other perches South
Open water
Open water
Open water
Open water
Open water
Open water
Riprap South
Riprap South
Salt Marsh North
Salt panne North
Salt panne North
Salt panne North
Salt panne North
Salt panne North
Salt panne North
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
August 1994 (continued)
Species
Brant
Willet
Western Gull
Great Blue Heron
Belted Kingfisher
Double-crested Cormorant (CSC)
Osprey (CSC)
Forster's Tern
Belted Kingfisher
Northern Rough-winged Swallow
Barn Swallow
Willet
Western Gull
Belding's Savannah Sparrow(FC2,SE)
Semipalmated Plover
Killdeer
Black-bellied Plover
Sandpiper, unidentified
Least Sandpiper
Dowitcher spp.
Total
Outer
Lagoon
1
1
Middle
Lagoon
Inner
Lagoon, west
of Bristol
Cove
Inner
Lagoon, east
of Bristol
Cove
2
13
13
52
12
1
5
37 21 17 925
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
I 1 I I 1 I 1 I II ! I 1 I 1 I 1 I 1 f 1 I : I I I I • | [ 1 I I
Habitat Shore
Aerial
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Beach South
Beach South
Beach South
Intertidal Flat East
lAtertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat North
Intertidal Flat North
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat West
Other perches North
Other perches North
Other perches South
Open water
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
September 1994
Species
Great Egret
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Western Gull
Forster's Tern
Western Gull
California Gull (CSC)
Ring-billed Gull
Great Egret
Snowy Egret
Green-winged Teal
American Coot
Semipalmated Plover
Killdeer
Black-bellied Plover
Whimbrel
Greater Yellowlegs
Willet
Sandpiper, unidentified
Least Sandpiper
Western Sandpiper
Dowitcher spp.
Marbled Godwit
American Avocet
Western Gull
Forster's Tern
Caspian Tern
Whimbrel
Willet
Great Blue Heron
Semipalmated Plover
Whimbrel
Spotted Sandpiper
Willet
Least Sandpiper
Western Sandpiper
Marbled Godwit
House Finch
Song Sparrow
Willet
Great Blue Heron
Western Gull
Belted Kingfisher
Black-bellied Plover
Outer
Lagoon
58
6
8
3
1
2
.
Inner
Lagoon, west
Middle of Bristol
Lagoon Cove
1
1
3 1
1
2
1
1
1
1
1
2
Inner
Lagoon, east
of Bristol
Cove
8
32
2
2
1
1
4
96
11
96
1
1
31
601
43
12
22
33
4
17
33
5
5
1
22
37
3
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
• i B i m i • i 11 11.11
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
September 1994 (continued)
Inner Inner
Lagoon, west Lagoon, east
Outer Middle of Bristol of Bristol
Habitat Shore Species Lagoon Lagoon Cove Cove
Open water Western Gull . . 1 2
Open water Heermann's Gull 1 . .
Open water Forster's Tern 1 3
Riprap North Willet . . 1 1
Riprap South Willet . . 1
Salt Marsh North Belding's Savannah Sparrow(FC2,SE) ... 2
Salt panne North Great Blue Heron ... 1
Salt panne North Killdeer ... 16
Salt panne North Whimbrel ... 1
Salt panne North Willet ... 1
Salt panne North Common Snipe ... 1
Total 80 1 12 1161
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
i i i i i i i i i i i r i r i r i r i i i r i i i mm mm mmi iiii
Habitat Shore
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Other perches
Other perches
Other perches
West
North
North
North
South
South
South
South
South
South
South
South
South
South
East
East
East
East
East
East
East
East
East
South
South
South
South
South
West
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
October 1994
Species
Outer
Lagoon
Middle
Lagoon
Inner
Lagoon, west
of Bristol
Cove
Double-crested Cormorant (CSC)
Great Egret 2
Northern Pintail
Western Gull
Forster's Tern
Mourning Dove
Black Phoebe
House Finch
Common Raven
Double-crested Cormorant (CSC) 8
Western Gull 5
Forster's Tern 1
California Brown Pelican (FE,SE) 63
American Coot
Spotted Sandpiper
Willet
Double-crested Cormorant (CSC)
Great Blue Heron
Snowy Egret
Turkey Vulture
Cooper's Hawk (CSC)
Willet
Least Sandpiper
Western Gull
House Finch
Song Sparrow
Great Blue Heron
Semipalmated Plover
Black-bellied Plover
Least Sandpiper
Dunlin
Western Sandpiper
Dowitcher spp.
Marbled Godwit
American Avocet
Great Egret
Snowy Egret
Green-winged Teal
American Wigeon
Willet 1
Great Blue Heron 1
Mourning Dove
House Finch
American Crow
Inner
Lagoon, east
of Bristol
Cove
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
26
3
1
1
1
2
16
30
2
1
57
45
83
45
296
4
20
33
2
1
19
2
r i r i r i r i r i r ri ri mm ii • i
Habitat Shore
Other perches
Other perches
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
North
North
South
North
North
North
North
North
North
North
North
North
North
North
North
North
North
North
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
October 1994 (continued)
Species
Western Gull
Belted Kingfisher
Osprey (CSC)
Eared Grebe
Western Grebe
Pied-billed Grebe
Mallard
Ruddy Duck
American Coot
Western Gull
Ring-billed Gull
Forster's Tern
Long-billed Curlew (FC3,CSC)
Willet
Anna's Hummingbird
Loggerhead Shrike (CSC)
Marsh Wren
Common Yellowthroat
Great Egret
Semipalmated Plover
Western Snowy Plover (FT,CSC)
Killdeer
Greater Yellowlegs
Dowitcher spp.
Western Meadowlark
Belding's Savannah Sparrow(FC2,SE)
Song Sparrow
Total
Outer Middle
Lagoon Lagoon
Inner
Lagoon, west
of Bristol
Cove
Inner
Lagoon, east
of Bristol
Cove
1
17
7
46
12
61
5
4
8
1
9
1
1
1
2
2
53
6
18
2
2
1
3
9
82 13 17 983
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
ri r i El B 1 • 1 1 I I i I
Habitat
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aerial
Aquaculture racks
Aquaculture racks
Aquaculture racks
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
November 1994
Shore Species
Double-crested Cormorant (CSC)
Turkey Vulture
Red-tailed Hawk
Northern Harrier (CSC)
Osprey (CSC)
Whimbrel
Willet
Ring-billed Gull
Mourning Dove
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Western Gull
North Snowy Egret
North Marbled Godwit
North Western Gull
South Pied-billed Grebe
South American Coot
South Black-bellied Plover
South Willet
South Dunlin
South Marbled Godwit
South Western Gull
South Ring-billed Gull
East Double-crested Cormorant (CSC)
East Snowy Egret
East Semipalmated Plover
East Black-bellied Plover
East Whimbrel
East Willet
East Dunlin
East Western Sandpiper
East Marbled Godwit
East American Avocet
East Western Gull
East Ring-billed Gull
East Forster's Tern
North Belted Kingfisher
Eared Grebe
Western Grebe
Pied-billed Grebe
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Scaup spp.
Redhead
Outer Middle
Lagoon Lagoon
2
1
123
24
15
1
1
Inner
Lagoon, west
of Bristol
Cove
10
2
4
1
9
1
Inner
Lagoon, east
of Bristol
Cove
3
1
1
1
1
1
22
1
.
.
45
1
1
1
34
20
2
1
23
39
1
15
483
14
40
360
1
1
25
4
1
1
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
300
10
1 r i r i r i r r i r i r i r i t i ri K 1 M ft 1 I I I I
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
November 1994 (continued)
Habitat Shore Species
Open water Bufflehead
Open water American Coot
Open water Western Gull
Open water Ring-billed Gull
Open water Heermann's Gull
Open water South Eared Grebe
Open water South Ruddy Duck
Open water South American Coot
Sandbar Great Blue Heron
Sandbar Willet
Sandbar Marbled Godwit
Sandbar Western Gull
Sandbar Ring-billed Gull
Salt Marsh North Marsh Wren
Salt Marsh North Common Yellowthroat
Salt Marsh North Western Meadowlark
Salt Marsh North House Finch
Salt Marsh North Savannah Sparrow
Salt panne North American Avocet
Salt panne North Black-necked Stilt
Total
Outer
Lagoon
400
200
2
.
.
300
60
Inner
Lagoon, west
Middle of Bristol
Lagoon Cove
25
50
1
10
16
60
30
Inner
Lagoon, east
of Bristol
Cove
400
2
25
24
.
2
1
5
2
2
1
2
1129 251 1904
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
1 I 1 I 1 I I I 1 I ! I ! I 1 I 1 I I I 1 I I i 1 I 1 1 I I 1 | ] | 1
Habitat Shore
Aerial
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Bank North
Bank North
Bank West
Bank West
Bank West
Bank West
Bank West
Bank West
Bank West
Bank West
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat East
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat South
Intertidal Flat South
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
December 1994
Species
California Brown Pelican (FE,SE)
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Great Blue Heron
Great Egret
Snowy Egret
Mallard
Western Gull
Heermann's Gull
Sandpiper, unidentified
Heermann's Gull
Western Grebe
Black-bellied Plover
Whimbrel
Willet
Marbled Godwit
Western Gull
California Gull (CSC)
Ring-billed Gull
Double-crested Cormorant (CSC)
Great Blue Heron
Green-winged Teal
Bufflehead
American Coot
Semipalmated Plover
Killdeer
Black-bellied Plover
Sandpiper, unidentified
Dowitcher spp.
Marbled Godwit
American Avocet
Black-necked Stilt
Forster's Tern
Snowy Egret
Semipalmated Plover
Black-bellied Plover
Whimbrel
Willet
Sanderling
Marbled Godwit
Western Gull
Ring-billed Gull
Black-bellied Plover
Willet
Inner
Lagoon, west
Outer Middle of Bristol
Lagoon Lagoon Cove
3
58
5
1
2
2
3
42
1
80
1
6
1
1
2
8
4
6
2
Inner
Lagoon, east
of Bristol
Cove
37
2
2
5
4
1
18
1
37
18
22
5
44
4
1
5
2
25
35
1
39
430
2
5
17
2
3
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
i i f i i i i i i i r I ! II II I ! I I II II II II II II III!
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
December 1994 (continued)
Habitat Shore Species
Intertidal Flat
Other perches
Other perches
Other perches
Other perches
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Riprap
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Seasonal Pond
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
South
North
North
North
South
South
South
East
East
East
East
North
North
North
North
North
North
Forster's Tern
Double-crested Cormorant (CSC)
Western Gull
California Gull (CSC)
Forster's Tern
Belted Kingfisher
Horned Grebe
Eared Grebe
Western Grebe
Pied-billed Grebe
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Gadwall
Green-winged Teal
Scaup spp.
Bufflehead
Ruddy Duck
American Coot
Western Gull
California Gull (CSC)
Snowy Egret
Double-crested Cormorant (CSC)
Great Blue Heron
Great Egret
Black-bellied Plover
Willet
Sandpiper, unidentified
Marbled Godwit
Ring-billed Gull
Double-crested Cormorant (CSC)
Gadwall
Western Gull
California Gull (CSC)
Black-necked Stilt
Northern Harrier (CSC)
Anna's Hummingbird
Marsh Wren
Belding's Savannah Sparrow(FC2,SE)
Song Sparrow
Total
Outer
Lagoon
1
12
1
Inner
Lagoon, west
Middle of Bristol
Lagoon Cove
1
2
1
1
2
3
6
1 3
2
21
21 44
5
100
1
7
1
1
1
1
5
40
6
3
.
. .
Inner
Lagoon, east
of Bristol
Cove
11
4
1
6
,
2
12
17
8
2
1
1
2
7
4
162 84 496 649
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
i 1 I 1 I I I f I 1 I 1 I 1 I I I I I I I 1 I 1 I 1 I I I 1 I I I I I 1 I 1
Habitat Shore
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Bank
Bank
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Other perches
Other perches
Other perches
Other perches
Other perches
Other perches
Other perches
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
South
West
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
North
North
North
North
South
South
South
South
North
North
North
North
North
North
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
January 1995
Species
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Willet
Western Gull
Willet
Whimbrel
Great Blue Heron
Gadwall
Green-winged Teal
American Coot
Semipalmated Plover
Black-bellied Plover
Willet
Least Sandpiper
Dunlin
Western Sandpiper
Dowitcher spp.
Marbled Godwit
American Avocet
Western Gull
California Gull (CSC)
Ring-billed Gull
Great Egret
Snowy Egret
Willet
Marbled Godwit
Great Egret
Black-bellied Plover
Willet
Marbled Godwit
Western Gull
Forster's Tern
Double-crested Cormorant (CSC)
Great Blue Heron
Osprey (CSC)
Western Gull
California Gull (CSC)
Ring-billed Gull
Horned Grebe
Eared Grebe
Western Grebe
Pied-billed Grebe
Double-crested Cormorant (CSC)
Mallard
Outer Middle
Lagoon Lagoon
9
27
1
1
3
.
1
1
3
9
1
1 3
5
3 3
.
Inner
Lagoon, west
of Bristol
Cove
1
(
1
4
.
1
2
1
3
1
1
2
1
1
11
14
3
1
2
Inner
Lagoon, east
of Bristol
Cove
1
4
6
2
39
52
34
2
14
145
21
16
1
8
1
.
1
1
.
5
4
1
75
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
r i i i r i i i i i r i i i r i i i n i
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
January 1995 (continued)
Habitat Shore
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Riprap
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Salt Marsh
Salt Marsh
Salt Marsh
Salt panne
North
North
North
North
North
North
North
North
North
North
North
Species
Gadwall
Green-winged Teal
Cinnamon Teal
Redhead
Canvasback
Lesser Scaup
Bufflehead
Ruddy Duck
Red-breasted Merganser
Red-tailed Hawk
American Coot
Marbled Godwit
California Gull (CSC)
Ring-billed Gull
Forster's Tern
Belted Kingfisher
Willet
Semipalmated Plover
Willet
Dunlin
Western Gull
California Gull (CSC)
Ring-billed Gull
Gadwall
Green-winged Teal
Northern Shoveler
Whimbrel
Willet
Black-necked Stilt
Green-winged Teal
American Coot
Willet
Gadwall
Total
Outer
Lagoon
Middle
Lagoon
I • I
Inner
Lagoon, west
of Bristol
Cove
Bl 1 I i I I
2
17
18
23
33
1
8
1
1
23
1
1
1
3
1
58
46
25
36
6
1
1
Inner
Lagoon, east
of Bristol
Cove
157
43
2
55
1
38
104
1
52
12
2
7
1
17
2
2
13
2
2
87 118 223 957
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
ii ii i i ii ii r i i i 11 ii r i i i • i B i • I ii 11 ii 11
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
February 1995
Habitat Shore Species
Aerial
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Bank
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
East
North
North
North
North
North
South
West
West
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
North
North
North
North
North
North
North
North
North
North
South
South
South
Northern Rough-winged Swallow
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Great Blue Heron
Snowy Egret
Sandpiper, unidentified
Western Grebe
Double-crested Cormorant (CSC)
Snowy Egret
American Coot
Spotted Sandpiper
Spotted Sandpiper
Ring-billed Gull
American Crow
American Coot
Willet
Clark's Grebe
Great Blue Heron
Snowy Egret
Semipalmated Plover
Black-bellied Plover
Willet
Least Sandpiper
Dunlin
Western Sandpiper
Dowitcher spp.
Marbled Godwit
American Avocet
Western Gull
Ring-billed Gull
Caspian Tern
Snowy Egret
Semipalmated Plover
Whimbrel
Willet
Least Sandpiper
Dunlin
Western Sandpiper
Sanderling
Marbled Godwit
California Gull (CSC)
Western Grebe
Clark's Grebe
Snowy Egret
Outer
Lagoon
Middle
Lagoon
Inner
Lagoon, west
of Bristol
Cove
Inner
Lagoon, east
of Bristol
Cove
11
1
10
2
2
1
7
10
2
148
6
19
1
3
2
43
1
1
4
23
44
18
12
3
190
4
31
10
7
24
1
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
ii i i r i i • it ii r i
Habitat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Other perches
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Riprap
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
i r i r i r i i i i i
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
February 1995 (continued)
• m § ii 11 ii
Shore Species
South Black-bellied Plover
South Willet
South Sandpiper, unidentified
South Western Sandpiper
South Marbled Godwit
South Osprey (CSC)
South Belted Kingfisher
Eared Grebe
Western Grebe
Pied-billed Grebe
Double-crested Cormorant (CSC)
Great Blue Heron
Gadwall
Green-winged Teal
Redhead
Canvasback
Lesser Scaup
Bufflehead
Surf Scoter
Ruddy Duck
Red-breasted Merganser
American Coot
West Sanderling
Great Blue Heron
Great Egret
Snowy Egret
Marbled Godwit
Western Gull
California Gull (CSC)
Ring-billed Gull
North Mallard
North Gadwall
North Green-winged Teal
North Willet
North Black-necked Stilt
Willet
North Marsh Wren
North Common Yellowthroat
North Belding's Savannah Sparrow(FC2,SE)
Total
Outer
Lagoon
t
4
1
.
1
2
2
1
7
.
Inner
Lagoon, west
Middle of Bristol
Lagoon Cove
1 1
22
61
4
23
1
1 2
1 5
1 1
1
1
.
7 51
18 65
2
28
.
1
1
1
2
3
1
6
. .
Inner
Lagoon, east
of Bristol
Cove
1
9
2
2
37
31
1
36
68
1
3
14
25
1
2
10
1
2
8
42 73 471 676
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
ti ti II ii it f i ii r i i i i i mm mm ft I El II II II
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
March 1995
Habitat Shore
Aerial
Aerial
Aquaculture racks
Aquaculture racks
Aquaculture racks
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Bank North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat North
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Intertidal Flat South
Species
Northern Harrier (CSC)
Common Raven
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Western Gull
Mallard
Gadwall
Green-winged Teal
Northern Shoveler
American Coot
Black-bellied Plover
Whimbrel
Least Sandpiper
Western Sandpiper
Dowitcher spp.
Ring-billed Gull
Caspian Tern
Snowy Egret
Gadwall
Black-bellied Plover
Long-billed Curlew (FC3,CSC)
Whimbrel
Willet
Least Sandpiper
Western Sandpiper
Marbled Godwit
American Avocet
Western Gull
Snowy Egret
Gadwall
Green-winged Teal
American Coot
Black-bellied Plover
Whimbrel
Willet
Sandpiper, unidentified
Least Sandpiper
Western Sandpiper
Sanderling
Marbled Godwit
American Avocet
Western Gull
California Gull (CSC)
Ring-billed Gull
Outer
Lagoon
2
27
3
Middle
Lagoon
Inner
Lagoon, west
of Bristol
Cove
13
Inner
Lagoon, east
of Bristol
Cove
1
1
2
15
6
2
1
5
1
6
38
3
3
2
1
3
6
15
1
67
10
2
2
1.
26
3
1
1
1
3
116
10
54
1
9
2
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
II II II 1 ] f 1 f 1 I 1 I 1 I I II 1 II 1 II II
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
March 1995 (continued)
Habitat Shore Species
Other perches
Other perches
Other perches
Other perches
Other perches
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Riprap
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
North
North
North
North
West
North
North
North
North
North
North
North
North
North
North
North
North
North
North
North
North
North
North
North
Outer Middle
Lagoon Lagoon
Osprey (CSC)
Forster's Tern
Great Blue Heron
Willet
Western Gull
Ring-billed Gull
Eared Grebe
Western Grebe
Clark's Grebe
Pied-billed Grebe
Double-crested Cormorant (CSC)
Mallard
Gadwall
Lesser Scaup
Bufflehead
Surf Scoter
Ruddy Duck
American Coot
California Gull (CSC)
Ring-billed Gull
Caspian Tern
Northern Rough-winged Swallow
Barn Swallow
Willet
Snowy Egret
Green-winged Teal
Whimbrel ...
American Avocet
Snowy Egret
Killdeer
Willet
Western Sandpiper
Marsh Wren
Common Yellowthroat
Western Meadowlark
Red-winged Blackbird
Belding's Savannah Sparrow(FC2,SE)
Song Sparrow
Great Blue Heron
Semipalmated Plover
Killdeer
Whimbrel
Willet
Inner
Lagoon, west
of Bristol
Cove
1
1
1
1
2
3
10
14
1
1
9
7
74
17
43
6
6
1
.
.
Inner
Lagoon, east
of Bristol
Cove
2
3
1
12
76
1
1
1
5
1
7
1
2
4
4
5
9
12
11
15
11
1
10
2
1
10
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
1 3 1 I i 1 I I I a I I I 1 I I f 1 • I II KlBiKIftl ft ] 11 If I|
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
March 1995 (continued)
Inner Inner
Lagoon, west Lagoon, east
Outer Middle of Bristol of Bristol
Habitat Shore Species Lagoon Lagoon Cove Cove
Salt panne North Least Sandpiper . . . 11
Salt panne North Western Sandpiper . . 2
Salt panne North American Avocet . . . 4
Salt panne North Black-necked Stilt . . . 2
Total 45 28 224 648
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
11 ri • i ii r i r i * * mm mm t * mm mm mm mm m i i ii
Habitat Shore
Aerial
Aerial
Aguaculture racks
Aquaculture racks
Aquaculture racks
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Open water
Open water
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
East
North
North
North
North
North
North
South
South
South
South
South
South
South
South
South
South
South
West
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
April 1995
Species
Willet
Bonaparte's Gull
California Brown Pelican (PE.SE)
Double-crested Cormorant (CSC)
Forster's Tern
Double-crested Cormorant (CSC)
Great Egret
Snowy Egret
Gadwall
Semipalmated Plover
Black-bellied Plover
Whiinbrel
Willet
Dunlin
Western Sandpiper
Dowitcher spp.
Marbled Godwit
American Avocet
Western Gull
California Gull (CSC)
Ring-billed Gull
Forster's Tern
Caspian Tern
Black Skimmer (CSC)
Pacific Loon
Snowy Egret
Whimbrel
Spotted Sandpiper
Willet
Marbled Godwit
Mallard
American Coot
Black-bellied Plover
Whimbrel
Willet
Western Sandpiper
Marbled Godwit
Western Gull
California Gull (CSC)
Ring-billed Gull
Forster's Tern
Western Gull
Eared Grebe
Western Grebe
Outer
Lagoon
35
8
3
Middle
Lagoon
Inner
Lagoon, west
of Bristol
Cove
1
1
1
2
3
2
2
50
6
6
10
1
2
Inner
Lagoon, east
of Bristol
Cove
1
1
1
1
2
2
51
1
2
4
4
526
1
9
32
2
14
3
5
4
5
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
t i i i t i i i r i i i i i ii t i mm mm mm KIKJIIIIIIII
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
April 1995 (continued)
Habitat
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Sandbar
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Seasonal Pond
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Shore Species
Double-crested Cormorant (CSC)
Mallard
Gadwall
Redhead
Lesser Scaup
Bufflehead
Ruddy Duck
Red-breasted Merganser
American Coot
Western Gull
California Gull (CSC)
Forster's Tern
California Least Tern (FE,SE)
Caspian Tern
Great Blue Heron
Snowy Egret
Willet
Marbled Godwit
Western Gull
California Gull (CSC)
Heermann's Gull
Forster's Tern
Caspian Tern
North Mallard
North Gadwall
North Green-winged Teal
North Cinnamon Teal
North American Avocet
North Red-necked Phalarope
North Marsh Wren
North Common Yellowthroat
North Red-winged Blackbird
North Belding's Savannah Sparrow(FC2,SE)
North Lincoln's Sparrow
North Snowy Egret
North Gadwall
North Killdeer
North Willet
North American Avocet
North California Gull (CSC)
North Forster's Tern
North Caspian Tern
Total
Outer
Lagoon
.
7
2
1
18
1
1
t
(
Inner Inner
Lagoon, west Lagoon, east
Middle of Bristol of Bristol
Lagoon Cove Cove
1
1
15
12
2 . 1
2 . 24
8
2
2 25
2
8
11 5
. •
1 1
1
3
4
3
1 6
. .
3
3
11
4
2
1
4
5
4
2
6
13
1
1
12
1
2
2
2
2
4
84 24 116 859
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
t i f i PI mm mm mm mm mm mm mm mm i mm mm
Habitat
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Other perches
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Open water
Riprap
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt Marsh
Salt panne
Salt panne
Salt panne
Salt panne
Salt panne
Shore Species
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
May 1995
Outer
Lagoon
Middle
Lagoon
Inner
Lagoon, west
of Bristol
Cove
California Brown Pelican (FE,SE) 26
Double-crested Cormorant (CSC) 2
Red-breasted Merganser 1
Western Gull 31
East Double-crested Cormorant (CSC)
East Great Blue Heron
East Snowy Egret
East Gadwall
East Killdeer
East Whimbrel
East Willet
East American Avocet
East Western Gull
East Black Skimmer (CSC)
North Snowy Egret
North Gadwall
North Black-bellied Plover
North Whimbrel
South Spotted Sandpiper
Forster's Tern
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Great Egret
Snowy Egret 2
Western Gull
Forster's Tern 2
California Least Tern (FE,SE)
Cliff Swallow
Common Raven
American Crow
North American Crow
North Great Egret
North Cliff Swallow
North Marsh Wren
North Common Yellowthroat
North Red-winged Blackbird
North Belding's Savannah Sparrow(FC2,SE)
South Common Yellowthroat
North Mallard
North Gadwall
North Killdeer
North American Avocet
North Red-winged Blackbird
Total 64
1
1
1
3
2
2
15
Inner
Lagoon, east
of Bristol
Cove
1
16
5
4
3
14
1
2
4
2
13
2
25 115
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
ii ii ii t i i 1 I I I 1 I ] I 1 I 1 1 I I I I ] I 1 ii i i ii i i
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
June 1995
Habitat
Aquaculture racks
Aquaculture racks
Aquaculture racks
Aquaculture racks
Intertidal Plat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Intertidal Flat
Other perches
Open water
Open water
Open water
Open water
Open water
Sandbar
Sandbar
Sandbar
Sandbar
Seasonal Pond
Seasonal Pond
Salt Marsh
Shore Species
California Brown Pelican (FE,SE)
Double-crested Cormorant (CSC)
Western Gull
Heermann's Gull
East California Brown Pelican (FE,SE)
East Great Blue Heron
East Snowy Egret
East Mallard
East Gadwall
East Killdeer
East Black-bellied Plover
East Long-billed Curlew (FC3,CSC)
East Whimbrel
East American Avocet
East Black-necked Stilt
East Western Gull
East California Gull (CSC)
East Forster's Tern
East Black Skimmer (CSC)
North Marbled Godwit
North Western Gull
North American Crow
South California Brown Pelican (FE,SE)
South Green-backed Heron
South Snowy Egret
South Black-bellied Plover
South Whimbrel
South Willet
South Marbled Godwit
South Western Gull
South Black Phoebe
California Least Tern (FE,SE)
Red-breasted Merganser
Western Gull
Forster's Tern
California Least Tern (FE.SE)
Cliff Swallow
California Brown Pelican (FE,SE)
Great Blue Heron
Snowy Egret
Western Gull
North American Avocet
North Black-necked Stilt
North Mallard
Inner
Lagoon, west
Outer Middle of Bristol
Lagoon Lagoon Cove
23
6
10
1
.
.
.
4
1
4
1
1
2
1
1
1 1
1
4
2
1
2
2
1 . .
1
21 . 1
1
1
62 . 15
Inner
Lagoon, east
of Bristol
Cove
6
1
17
19
7
2
4
1
1
13
3
5
1
2
2
.
1
1
3
2
6
2
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
I 1 I 1 1 I I 1 I 1 I 1 I 1 ! I f 1 I I I 1 I 3 I 1 I i I 1 I 1 I 1 I 1 I f
Agua Hedionda Lagoon Bird Data
Counts by lagoon section and habitat
June 1995 (continued)
Inner Inner
Lagoon, west Lagoon, east
Outer Middle of Bristol of Bristol
Habitat Shore Species Lagoon Lagoon Cove Cove
Salt Marsh North Gadwall ... 1
Salt Marsh North Cliff Swallow ... 9
Salt Marsh North Marsh Wren ... 4
Salt Marsh North Common Yellowthroat ... 5
Salt Marsh North Red-winged Blackbird ... 10
Salt Marsh North Belding's Savannah Sparrow(FC2,SE) ... 6
Salt Marsh North Song Sparrow ... 2
Salt Marsh North Common Raven ... 5
Salt panne North American Avocet ... 2
Total 126 18 28 151
Special status codes:
CSC=California Department of Fish and Game, Species of Special Concern; FE=Listed as Endangered by the Federal Government;
FT=Listed as Threatened by the Federal Government; SE=Listed as Endangered by the State of California
FC2=Category 2 candidate for Federal listing for which USFWS does not have information to support listing
FC3=USFWS category, too widespread or not threatened
A.3 Total Abundances by Bird Category,
Habitat, Lagoon Section, and Shore
f i f i ri ri i i r i r i r i r i ri ri ii ii i i
Location
Outer Lagoon
Outer Lagoon
Outer Lagoon
Outer Lagoon
Outer Lagoon
Outer Lagoon
Outer Lagoon
Outer Lagoon
Habitat
Open water
Sandbar
Intertidal Flat
Bank
Riprap
Aquaculture racks
Other perches
Aerial
Agua Hedionda Lagoon Bird Data
Total Abundance
August 1994 - June 1995
Bird Category
Cormorants/Pelicans
Skimmers/Terns
Egrets/Herons
Loons/Mergansers
Grebes
Coots/Dabbling Ducks/Geese
Diving Ducks
Gulls
Cormorants/Pelicans
Shorebirds
Gulls
Egrets/Herons
Coots/Dabbling Ducks/Geese
Shorebirds
Gulls
Egrets/Herons
Grebes
Shorebirds
Gulls
Passerines
Egrets/Herons
Shorebirds
Gulls
Cormorants/Pelicans
Skimmers/Terns
Egrets/Herons
Loons/Mergansers
Coots/Dabbling Ducks/Geese
Shorebirds
Gulls
Skimmers/Terns
Cormorants/Pelicans
Egrets/Herons
East
Shore
.
2
West North South
Shore Shore Shore
«
.
. .
1 . 1
1
3 . 1
8
1 1
6
15
21 2
Othe:
3
14
2
3
14
4
60
604
21
1
442
.
.
87 457
7
7
1
3
1
117
r i i r i r i r i r i r i • i mm mm mm 1 K I II
Location
Middle Lagoon
Middle Lagoon
Middle Lagoon
Middle Lagoon
Middle Lagoon
Middle Lagoon
Middle Lagoon
Habitat
Open water
Sandbar
Intertidal Flat
Bank
Riprap
Other perches
Aerial
Agua Hedionda Lagoon Bird Data
Total Abundance
August 1994 - June 1995
Bird Category
Cormorants/Pelicans
Kingfishers
Skimmers/Terns
Loons/Mergansers
Grebes
Coots/Dabbling Ducks/Geese
Diving Ducks
Gulls
Passerines
Cormorants/Pelicans
Egrets/Herons
Shorebirds
Gulls
Egrets/Herons
Loons/Mergansers
Coots/Dabbling Ducks/Geese
Shorebirds
Gulls
Passerines
Egrets/Herons
Grebes
Coots/Dabbling Ducks/Geese
Shorebirds
Shorebirds
Passerines
Kingfishers
Egrets/Herons
Gulls
Passerines
Doves
Cormorants / Pel icans
Egrets/Herons
Gulls
East
Shore
•
f
•
.
West North
Shore Shore
_ (
, .
5
1
,
99
1
4
1
1
1
1
1
1
1
1
1
t .
.
South
Shore
.
4
2
28
2
1
.
2
2
,
f
.
Othe:
2
1
7
1
12
8
112
4
11
1
1
37
15
10
.
.
.
.
3
5
1
1
1
\ ri r i r i r i r i r i r i i i r i r i i i K* •• Ei Bi Ki i i • i i i
: Agua Hedionda Lagoon Bird Data
Total Abundance
August 1994 - June 1995
* East West North South
j Location Habitat Bird Category Shore Shore Shore Shore Other
j
West Inner Lagoon Open water Cormorants/Pelicans . . . .10
Kingfishers .... 1
Ospreys .... 1
Skimmers/Terns .... 4
I Egrets/Herons .... 2
j Grebes . . . .114
Coots/Dabbling Ducks/Geese .... 270
Diving Ducks . . • • 441
Shorebirds .... 8
Gulls . . . .19
Passerines . . . .25
West Inner Lagoon Sandbar Cormorants/Pelicans .... 1
Skimmers/Terns .... 6
Egrets/Herons . . . .11
Shorebirds . . . . 75
Gulls . . .115
West Inner Lagoon Intertidal Flat Cormorants/Pelicans 1
Skimmers/Terns . . . 3 .
Egrets/Herons ..61.
Grebes . . . 5 .
Coots/Dabbling Ducks/Geese . . . 5 .
Shorebirds . . 278 215
Gulls 42 36
Passerines . . . 2 .
West Inner Lagoon Bank Cormorants/Pelicans 2
Grebes . . . 2 .
Coots/Dabbling Ducks/Geese 11
Shorebirds . . 92 15
Passerines 5
West Inner Lagoon Riprap Shorebirds ..12.
West Inner Lagoon Other perches Cormorants/Pelicans . . 3 . .
Kingfishers ..14.
Ospreys ... 1 1
Skimmers/Terns .... 5
Egrets/Herons ..21.
Shorebirds . . 1 . .
Gulls 24
West Inner Lagoon Aerial Cormorants/Pelicans .... 3
Egrets/Herons .... 5
Gulls .... 1
Passerines .... 1
r i ri r i r i r i r i i i r i r i r i i K •1 R 1 • • 11 II II
Location Habitat
East Inner Lagoon Open water
East Inner Lagoon Sandbar
East Inner Lagoon Intertidal Flat
East Inner Lagoon Bank
East Inner Lagoon Beach
East Inner Lagoon Riprap
East Inner Lagoon Other perches
East Inner Lagoon Salt Marsh
Agua Hedionda Lagoon Bird Data
Total Abundance
August 1994 - June 1995
Bird Category
Cormorants/Pelicans
Skimmers/Terns
Loons/Mergansers
Grebes
Coots/Dabbling Ducks/Geese
Diving Ducks
Gulls
Passerines
Hawks/Vultures
Cormorants/Pelicans
Coots/Dabbling Ducks/Geese
Gulls
Cormorants/Pelicans
Skimmers/Terns
Egrets/Herons
Grebes
Coots/Dabbling Ducks/Geese
Diving Ducks
Shorebirds
Gulls
Cormorants/Pelicans
Skimmers/Terns
Egrets/Herons
Coots/Dabbling Ducks/Geese
Shorebirds
Gulls
Passerines
Hawks/Vultures
Cormorants/Pelicans
Shorebirds
Gulls
Shorebirds
Ospreys
Skimmers/Terns
Gulls
Passerines
Egrets/Herons
Coots/Dabbling Ducks/Geese
Shorebirds
Passerines
Hummingbirds
Hawks/Vultures
East
Shore
t
2
12
25
14
75
56
1
80
2
4697
490
West North
Shore Shore
.
t .
,
2
, ,
5
103
2
.
2
26
79
3
2
•
1
1
. .
2
18
22
216
2
1
South
Shore
2
24
25
.
.
4
51
.
295
3
1
45
21
84
2
2
3
67
1
•
1
Othe:
3
33
2
59
562
766
423
3
1
43
•
2
1
1
10
r i r i r i r i r i i i i i r i r i ii m M E i •i i i 11 ti ii
Location Habitat
East Inner Lagoon Salt panne
East Inner Lagoon Seasonal Pond
East Inner Lagoon Aerial
Agua Hedionda Lagoon Bird Data
Total Abundance
August 1994 - June 1995
Bird Category
Skimmers/Terns
Egrets/Herons
Coots/Dabbling Ducks/Geese
Shorebirds
Gulls
Passerines
Egrets/Herons
Coots/Dabbling Ducks/Geese
Shorebirds
Ospreys
Skimmers/Terns
Egrets/Herons
Coots/Dabbling Ducks/Geese
Shorebirds
Gulls
Passerines
Doves
Hawks/Vultures
East
Shore
West
Shore
North
Shore
6
5
20
263
2
15
1
86
56
South
Shore Other
1
1
8
12
3
23
25
14
6
B.1 Water Quality Data During Fish Surveys
Agua Hedionda Lagoon Water Quality Data
July 1994
Lagoon Sample
Section Station Depth (m)
Outer O1
B2
Middle B3
B4
B5
West Inner B6
B9
East Inner B7
B8
Temperature
(deg. C)
pH
0.5
2.1
4.3
0.5
1.6
3.3
0.3
0.7
1.4
0.3
0.9
1.9
0.3
1.1
2.2
0.3
1.2
2.4
0.3
1.1
2.1
0.3
0.9
1.5
0.3
0.8
1.7
21.30
20.94
20.83
20.89
21.07
21.08
23.14
23.14
23.14
23.77
23.80
22.87
22.71
22.45
22.34
23.00
23.11
22.43
23.19
22.15
22.11
24.72
24.81
24.73
24.74
24.75
24.68
7.71
7.73
7.73
7.74
7.74
7.74
7.75
7.76
7.76
7.73
7.77
7.86
7.80
7.82
7.85
7.74
7.74
7.77
7.71
7.75
7.75
7.67
7.69
7.69
7.68
7.70
7.70
32.7
32.7
32.7
32.7
32.7
32.7
32.5
32.5
32.7
32.6
32.7
32.7
32.6
32.7
32.6
32.6
32.8
32.5
32.6
32.7
32.3
32.5
32.7
32.6
32.6
32.5
32.5
7.3
7.5
7.5
7.5
7.5
7.4
9.5
9.3
9.6
10.4
9.6
12.7
9.9
10.1
10.6
10.0
9.1
9.9
10.2
9.8
9.8
9.8
9.1
9.5
9.0
9.2
9.4
Salinity Dissolved Secchi
Oxygen Depth (m)
4.50
5.00
1.40
2.00
2.25
2.00
2.25
0.75
1.25
Agua Hedionda Lagoon Water Quality Data
April 1995
Lagoon Sample
Section Station Depth (m)
Outer O1
B2
Middle B3
B4
B5
West Inner O2
B6
B9
East Inner B7
B8
Temperature
(deg. C)
pH
0.0
2.1
4.2
0.0
1.9
3.7
0.0
2.1
4.1
0.0
0.6
1.1
0.0
0.7
1.3
0.0
1.3
2.6
0.0
1.6
3.0
0.0
1.6
3.2
0.0
1.5
3.1
0.0
1.4
2.4
15.54
15.38
15.32
15.40
15.40
15.30
15.82
15.80
15.82
15.57
15.38
15.45
15.48
15.41
15.41
16.80
16.70
16.40
16.70
15.20
14.80
15.90
15.20
14.90
16.90
16.80
16.00
16.20
16.20
16.30
m
t
•
.
f
f
.
.
•
7.85
7.85
7.95
7.87
7.85
7.82
7.86
7.85
7.82
7.89
7.90
7.83
7.83
7.83
7.81
31.2
31.2
31.3
31.0
31.1
31.6
31.3
31.2
31.3
31.3
31.3
32.0
31.6
32.1
32.0
29.1
29.4
31.3
22.9
30.4
31.5
30.0
30.6
31.1
28.2
28.8
31.7
22.0
29.1
30.0
18.2
17.7
17.6
16.6
16.4
16.2
17.8
17.5
18.1
16.5
17.1
17.1
18.4
16.9
17.3
8.8
9.3
10.8
8.5
8.5
9.5
8.2
8.5
8.8
8.5
8.5
7.9
9.0
9.1
9.1
Salinity Dissolved Secchi
Oxygen Depth (m)
1.25
1.25
0.75
1.50
1.25
1.10
1.00
1.00
1.25
1.25
m
m
m
m
B.2 Mean Density by Gear Type, Lagoon
Section, Station, and Survey
m
m
mm
m
Agua Hedionda Lagoon Fish Data
Density per m2 by Gear Type and Station
Outer Lagoon
July 1994
Syngnathus leptorhynchus
Syngnathus auliscus
Paralabrax clathratus
Paralabrax maculatofasciatus
Hypsoblennius gentilis
Heterostichus sp.
Heterostichus rostratus
Clevelandia ios
Quietula y-cauda
Gillichthys mirabilis
Paralichthys califomicus
Pleuronichthys rttteri
TOTAL
Number of species
Beam Trawl
B1 B2
0.004
0.008
0.004
0.004
0.004
0.004
0.004
0.032
7.000
0.003
0.003
0.017
Otter Trawl
O1
0.002
0.004
0.001
0.002
0.017
0.023
3.000
0.027
5.000
Middle Lagoon
July 1994
Engraulis mordax
Anchoa compressa
Fundulus parvipinnis
Atherinops affinis
Syngnathus leptorhynchus
Syngnathus auliscus
Leptocottus armatus
Seriphus politus
Sphyraena argentea
Hypsoblennius gentilis
Heterostichus rostratus
Gobiidae
Clevelandia ios
Quietula y-cauda
Paralichthys califomicus
Hypsopsetta guttulata
TOTAL
Number of species
B3
Beam Trawl
B4 B5
Beach Seine
S1
0.004
0.008
0.012
2.000
0.016
0.008
0.072
0.016
0.004
0.116
5.000
0.004
0.090
2.700
0.010
0.008
0.004
0.016
3.000
0.040
0.030
0.030
2.900
6.000
S2
0.030
0.010
2.160
0.010
0.020
0.100
0.020
0.030
0.010
0.020
0.040
0.080
2.530
12.000
m
mm
pm
mm
Agua Hedionda Lagoon Fish Data
Density per m2 by Gear Type and Station
West Inner Lagoon
July 1994
Anchoa compressa
Atherinops affinis
Syngnathus leptorhynchus
Syngnathus auliscus
Paralabrax nebulifer
Micropterus dolomieui
Umbrina roncador
Seriphus politus
Cymatogaster aggregata
Hypsoblennius gentilis
Heterostichus rostratus
Gobiidae
Clevelandia ios
Acanthogobius flavimanus
Paralichthys californicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B6 B9
0.007
0.012
0.004
0.003
0.016
2.000
0.010
2.000
Otter Trawl
O2
0.002
0.001
0.001
0.005
0.006
0.001
0.016
6.000
Beach Seine
S3
0.030
0.090
0.060
0.060
0.020
0.010
0.040
0.050
0.080
0.030
0.030
0.010
0.510
12.000
S7
0.200
0.110
0.010
0.060
0.010
0.030
0.260
0.020
0.700
7.000
East Inner Lagoon
July 1994
Mustelus californicus
Gymnura marmorata
Engraulis mordax
Anchoa compressa
Fundulus parvipinnis
Atherinops affinis
Syngnathus auliscus
Paralabrax nebulifer
Seriphus politus
Cymatogaster aggregata
Gobiidae
Clevelandia ios
Acanthogobius flavimanus
Quietula y-cauda
Gillichthys mirabilis
Paralichthys californicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B7 B8
0.012
1.496 0.072
1.508
2.000
0.072
1.000
S4
0.010
0.010
Beach Seine
S5
0.010
0.260
0.010
0.030
0.010
0.180
0.090
0.010
0.020
0.010
0.640
11.000
0.100
0.010
0.120
3.000
S6
0.010
0.150
0.020
0.200
6.030
1.420
0.020
0.400
0.020
8.270
8.000
m,
m
m
m
m
Agua Hedionda Lagoon Fish Data
Density per m2 by Gear Type and Station
Outer Lagoon
April 1995
i
Quietula y-cauda
Gobiidae (< 25 mm)
Citharichthys stigmaeus
Paralichthys californicus
TOTAL
Number of species
Beam Trawl
B1 B2
0.005
0.035
0.005
0.045
3.000
0.000
Otter Trawl
O1
0.001
0.001
0.003
2.000
IFm
m
m
Middle Lagoon
April 1995
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Leptocottus armatus
Paralabrax maculatofasciatus
Cymatogaster aggregate
Hypsoblennius gentilis
Heterostichus rostratus
Clevelandia ios
Acanthogobius flavimanus
llypnus gilbert!
Quietula y-cauda
Gillichthys mirabilis
Gobiidae (< 25 mm)
Paralichthys californicus
Pleuronichthys ritteri
Hypsopsetta guttulata
Symphurus atricauda
TOTAL
Number of species
B3
Beam Trawl
B4
0.140
0.033
0.007
0.007
0.187
4.000
0.013
0.007
0.013
0.040
0.040
0.113
5.000
B5
0.025
0.015
0.015
0.030
0.005
0.090
5.000
Beach Seine
S1 S2
0.120
1.840
0.300
0.120
0.240
0.350
0.090
0.090
0.100
0.010
0.050
0.200
0.220
0.110
0.350
4.190
15.000
0.490
1.970
0.160
0.070
0.070
0.020
0.060
0.160
0.040
0.080
0.050
0.290
0.080
0.170
3.710
14.000
Agua Hedionda Lagoon Fish Data
Density per m2 by Gear Type and Station
p
m
West Inner Lagoon
April 1995
Engraulidae (< 50 mm)
Fundulus parvipinnis
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Leptocottus armatus
Paralabrax maculatofasciatus
Cymatogaster aggregata
Clevelandia ios
Acanthogobius flavimanus
llypnus gilbert!
Gillichthys mirabilis
Gobiidae (< 25 mm)
Paralichthys califomicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B6 B9
0.065
0.010
0.075
2.000
0.010
0.030
0.040
2.000
Otter Trawl
O2
0.052
0.009
0.001
0.062
3.000
Beach Seine
S3
0.010
0.160
0.050
0.030
0.030
0.010
0.230
0.040
0.030
0.190
0.780
10.000
S7
0.300
0.080
0.740
0.010
0.010
0.180
0.150
2.020
0.010
0.030
3.530
10.000
East Inner Lagoon
April 1995
Anchoa compressa
Fundulus parvipinnis
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Leptocottus armatus
Cymatogaster aggregata
Clevelandia ios
Acanthogobius flavimanus
Quietula y-cauda
Gillichthys mirabilis
Gobiidae (< 25 mm)
Paralichthys califomicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B7 B8
0.010
0.020
0.350
0.010
0.390
4.000
0.010
0.390
0.400
2.000
S4
0.170
2.380
13.000
Beach Seine
S5
0.010
0.020
0.140
0.110
0.030
0.110
0.070
0.200
0.800
0.220
0.170
0.330
0.010
0.490
15.960
.
0.180
0.140
0.030
0.040
10.300
0.250
27.400
9.000
S6
0.010
0.070
0.110
0.020
0.550
0.160
7.710
0.010
0.310
8.950
9.000
I
m
I
m
1
| B.3 Total Counts by Gear Type, Lagoon
Section, Station, and Survey
Agua Hedionda Lagoon Fish Data
Total Counts by Gear Type and Station
Outer Lagoon
July 1994
Beam Trawl Otter Trawl
B1 B2 O1
Syngnathus leptorhynchus . 1 2
Syngnathus auliscus 1
Paralabrax clathratus . 1 4
Paralabrax maculatofasciatus . . 1
Hypsoblennius gentilis . . 2
Heterostichus sp. 2 . .
Heterostichus rostratus . 5 16
Clevelandia ios 1
Quietula y-cauda 1
Gillichthys mirabilis 1
Paralichthys californicus 1
Pleuronichthys ritteri 1
TOTAL 8 7 25
Number of species 735
Middle Lagoon
July 1994
Beam Trawl Beach Seine
B3 B4 B5 S1 S2
Engraulis mordax ... . 3
Anchoa compressa ... . 1
Fundulus parvipinnis ... 9
Atherinops affinis . . . 270 216
Syngnathus leptorhynchus 141 . 1
Syngnathus auliscus ... 1
Leptocottus armatus ... . 2
Seriphus politus . . . . 10
Sphyraena argentea . . . . 2
Hypsoblennius gentilis . 2 .
Heterostichus rostratus 2 18 2 . 3
Gobiidae .41
Clevelandia ios . . . 4 1
Quietula y-cauda ... . 2
Paralichthys californicus . 1 . 3 4
Hypsopsetta guttulata ... 3 8
TOTAL 3 29 4 290 253
Number of species 2 5 3 6 12
Agua Hedionda Lagoon Fish Data
Total Counts by Gear Type and Station
West Inner Lagoon
July 1994
Anchoa compressa
Atherinops affinis
Syngnathus leptorhynchus
Syngnathus auliscus
Paralabrax nebulifer
Micropterus dolomieui
Umbrina roncador
Seriphus politus
Cymatogaster aggregate
Hypsoblennius gentilis
Heterostichus rostratus
Gobiidae
Clevelandia ios
Acanthogobius flavimanus
Paralichthys californicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B6 B9
Otter Trawl
O2
3
1
4
2
3
2
2
1
1
6
7
1
18
6
Beach Seine
S3 S7
3
9
6
6
2
1
4
5
8
3
3
1
51
12
20
11
1
6
1
3
26
2
70
7
East Inner Lagoon
July 1994
Mustelus californicus
Gymnura marmorata
Engraulis mordax
Anchoa compressa
Fundulus parvipinnis
Atherinops affinis
Syngnathus auliscus
Paralabrax nebulifer
Seriphus politus
Cymatogaster aggregate
Gobiidae
Clevelandia ios
Acanthogobius flavimanus
Quietula y-cauda
Gillichthys mirabilis
Paralichthys californicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B7 B8
3
374 18
377
2
18
1
S4
26
1
3
1
18
9
1
2
1
64
11
Beach Seine
S5
10
1
12
3
S6
1
15
2
20
603
142
2
40
2
827
8
mH
mm
ma
Agua Hedionda Lagoon Fish Data
Total Counts by Gear Type and Station
Outer Lagoon
April 1995
Quietula y-cauda
Gobiidae (< 25 mm)
Citharichthys stigmaeus
Paralichthys califomicus
TOTAL
Number of species
Beam Trawl
B1 B2
1
7
9
3
Otter Trawl
O1
1
1
2
2
Middle Lagoon
April 1995
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Leptocottus armatus
Paralabrax maculatofasciatus
Cymatogaster aggregate
Hypsoblennius gentilis
Heterostichus rostratus
Clevelandia ios
Acanthogobius flavimanus
llypnus gilberti
Quietula y-cauda
Gillichthys mirabilis
Gobiidae (< 25 mm)
Paralichthys califomicus
Pleuronichthys ritteri
Hypsopsetta guttulata
Symphurus atricauda
TOTAL
Number of species
B3
Beam Trawl
B4 B5
21
5
1
1
28
4
2
1
6
6
17
5
5
3
Beach Seine
18
5
S1
12
184
30
12
24
35
9
9
10
1
5
20
22
11
35
419
15
S2
49
197
16
7
7
2
6
16
4
8
5
29
8
17
371
14
1
I
Agua Hedionda Lagoon Fish Data
Total Counts by Gear Type and Station
West Inner Lagoon
April 1995
Engraulidae (< 50 mm)
Fundulus parvipinnis
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Leptocottus armatus
Paralabrax maculatofasciatus
Cymatogaster aggregata
Clevelandia ios
Acanthogobius flavimanus
llypnus gilbert!
Gillichthys mirabilis
Gobiidae (< 25 mm)
Paralichthys californicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B6 B9
13
2
15
2
1
3
4
2
Otter Trawl
O2
58
10
Beach Seine
S3 S7
69
3
1
16
5
3
3
1
23
4
3
19
78
10
30
8
74
1
1
18
15
202
1
3
353
10
East Inner Lagoon
April 1995
Anchoa compressa
Fundulus parvipinnis
Atherinops affinis
Atherinidae (< 25 mm)
Syngnathus sp.
Leptocottus armatus
Cymatogaster aggregata
Clevelandia ios
Acanthogobius flavimanus
Quietula y-cauda
Gillichthys mirabilis
Gobiidae (< 25 mm)
Paralichthys californicus
Hypsopsetta guttulata
TOTAL
Number of species
Beam Trawl
B7 B8
35
1
39
4
39
40
2
S4
1
2
14
11
3
11
7
20
80
22
17
33
17
238
13
Beach Seine
S5
1
49
1596
18
14
3
4
1030
25
2740
9
S6
1
7
11
55
16
771
1
31
895
9
B.4 Fish Size Data
ft I KI Kill II II II II IIII 11 II II II II II II
Agua Hedionda Lagoon Fish Size Data
July 1994
Species: Mustelus calforrtcus Counts by Size Class (cm)
Section Station Total Weight (gms)
S6 150
Species: Qymnura marmorata
Section Station Total Weight (gms)
S4 139
S5 260
Species: Engrauas mordax
Section Station Total Weight (gms)
C S2 1.4
S4 0.2
I S6 661
Species: Anchoa compressa
Section Station Total Weight (gms)
C S2 4.3
1 S3 32
S6 6.5
Species: Fundukis parvipinnis
Section Station Total Weight (gms)
C SI 6.5
1 SS 9.4
1 S6 3.7
Species: Atherinops atMs
Section Station Total Weight (gms)
C S1 76.62
C S2 1683.3
S3 8.3S4 65.4
S5 0.1
S6 176.69
S7 37.5
Species: Syngnathus leptorhynchus
Section Station Total Weight (gms)
C 83 0.4
C B4 3.68
C B5 1.19
C S2 1.7
B9 0.94
O B2 1.41
O O1 3.7
Species: Syngnalhus auRseus
Section Station Total Weight (gms)
C SI 1.5
S3 7.5
1 S4 2
S7 12.8
O B1 0.4
Species: leptocottus armatus
Section Station Total Weight (gms)
C S2 45
Species: Paralibrax clathratus
Section Staton Total Weight (gms)
0 B2 24
O O1 83
Species: Paralabrax rnacuatofasdatus
Section Station Total Weight (gms)
O 01 500
Species: Paralabnu nebuHer
Section station Total Weight (gmt)
O2 44
S3 93.1
S4 77
S7 38
Total Count
1
Total Count
1
1
Total Count
3
1
15
Total Count
1
3
2
Total Count
9
10
20
Total Count
270
216
9
26
1
803
20
Total Count
4
1
1
2
1
2
Total Count1
6
1
11
1
Total Count
2
Total Count
1
4
Total Count
1
Total Count
2
6
3
1
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (em)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (em)
0-0.9 1-1.9 2-2.9
6
5 3
10 10
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
19 191
3
2 1
1
1
2 202 66
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (em)
0-0.9 1-1.9 2-2.9
3-3.9
3-3.9
3-3.9
i
2
3-3.9
3-3.9
2
3-3.9
26
6
i
109
1
3-3.9
3-3.9
3-39
3-3.9
3-3.9
3-3,8
4-4.9
4-4.9
4-4.9
3
13
4-4.9
4-4.9
4-4.9
20
36
1
3
97
1
4-4.9
4-4.9
4-49
4-4.9
4-4.9
4-4.9
5-5.9
5-5.9
5-5.9
5-5.9
1
5-5.9
1
1
5-5.9
7
554
12
35
10
5-5.9
5-5.9
5-5.9
5-5.9
5-5.9
5-5.9
6-6.9
8-6.9
6-6.9
8-6.9
6-6.9
1
8-6.9
7
26
1
6
31
7
8-6.9
1
8-6.9
6-6.9
6-8.9
6-6.9
8-6.9
1
7-7.9
7-7.9
7-7.9
7-7.9
1
1
7-7.9
7-7.9
2
1
12
1
7-7.9
7-7.9
1
7-7.9
1
7-7.9
7-7.9
7-7.9
1
8-6.9
6-8.9
8-69
8-8.9
1
8-6.9
8-8.9
5
i
8
8-8.9
8-6.9
1
8-8.9
8-8.9
1
8-8.9
8-6.9
1
2
1
9-9.9 10-10.9 11-11.9
9-9.9 10-10.9 11-11.9
9-9.9 10-10.9 11-11.9
9-9.9 10-10.9 11-11.9
1 1
9-9.9 10-10.9 11-11.9
9-9.9 10-10.9 11-11.9
29 18 16
1
86 4
9-9.9 10-10.9 11-11.9
1
2
9-9.9 10-10.9 11-11.9
i
9-9.9 10-10.9 11-11.9
9-9.9 10-10.9 11-11.9
1
1 2
9-9.9 10-10.9 11-119
9-9.9 10-10.9 11-11.9
1
1 . 1
1
1
12-12.9
12-12.9
12-12.9
12-12.9
12-12.9
12-12.9
10
1
13-12.9
1
12-12.9
1
1
12-129
1
12-12.9
12-12.9
12-12.9
1
11-13.8 14-14.9 15-15.9 18-18.9 17-17.9 16-18.9 19-19.9 20-20.9 28-28.9 37375
1
13-13.9 14-14.9 15-15.9 16-18.9 17-17.9 18-16.9 19-19.9 20-20.9 28-26.9 37-37.9
1 • •
1
13-13.9 14-14.9 15-15.9 18-16.9 17-17.9 18-16.9 19-19.9 20-20.9 26-26.9 37-375
13-13.9 14-14.9 15-15.9 18-16.9 17-17.9 16-18.9 19-19.9 20-20.9 26-28.9 37-37.9
13-13.9 14-14.9 15-15.9 18-16.9 17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-373
13-13.9 14-14.9 15-15.9 18-16.9 17-17.9 16-18.9 19-19.9 20-20.9 28-26.9 37-375
6 ... .... . .
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-16.9 19-19.9 20-20.9 28-26.9 37-375
'. . 1 1 .... . .
1 . . .... . .
1 ... .
1
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-375
1 . . .... .
13. .... .
1 ... . .
2132 1 . .
13-139 14-14.9 15-15.9 16-16.9 17-17.9 16-16.9 19-19.9 20-20.9 26-26.9 37-375
13-13.9 14-14.9 15-15.9 18-16.9 17-17.9 16-16.9 19-19.9 20-20.9 26-26.9 37J75
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 16-16.9 19-19.9 20-20.9 26-26.9 37J75
1
13-13.9 14-14.9 15-15.9 16-18.9 17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-375
I 1 II II B I II I 1 II I 1I I i i
Agua Hedionda Lagoon Fish Size Data
July 1994
Spedes: Mfcroptena dolomieul
Section Station Total Weight (gms)
S3 0.2
Spedes: Umbrkw roncador
Section Station Total Weight (gms)
02 44
Spedes: Seriphus poltus
Section Station Total Weight (gms)
C S2 4.5
B7 1.34
S3 0.5
Spedes: Cymatogaster aggregate
Section Station Total Weight (gms)
S3 22
S4 32
Spedes: Sphyraena argentea
Section Station Total Weight (gms)
C S2 0.8
Species: HypsoMennhis gentis
Section Station Total Weight (gms)
C B4 16.14
O2 16
S3 63.5
O O1 36
Species: Heterostichus sp.
Section Station Total Weight (gms)
O B1 0.2
Species: Heterosltehus rosfratus
Section Station Total Weight (gms)
C 83 4.1
C B4 46.25
C B5 2.07
C S2 5.3
B8 2.89
B9 0.66
O2 17.4
S3 44.1
S7 49.3
O B2 15.2
O O1 55.1
Spedes: Gobtdae
Section Station Total Weight (gms)
C B4 0.19
C B5 0.2
B8 0.08
B7 51.42
B8 0.8
56 5.71
S7 0.3
Species: Cleveland* tat
Section station Total Weight (gms)
C S1 0.4
C S2 0.1
S8 0.28
S7 0.3
0 B1 0.1
Species: Acanlhogoblus flavimanus
Section Station Total Weight (gms)
S3 32.2
S4 115
1 S7 199.9
Total Count
2
Total Count
1
Total Count
10
3
1
Total Count
4
1
Total Count
2
Total Count
21
5
2
Total Count
2
Total Count
218
2
3
3
1
8
8
6
5
16
Total Count
4
1
1
374
18
142
1
Total Count
4
1
2
3
1
Total Count
3
18
26
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
2
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
5 5
1 2
1
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
2
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
4
1
1
173 159 42
17 1
138 4
1
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
4
1
1 . 1
3
1
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9
1
4-4.9
4-4.9
4-4.9
4-4.9
4-4.9
2
4-4.9
4-4.9
4-4.9
1
i11
4-4.9
4-4.9
4-4.9
5-5.9
5-5.9
5-5.9
5-5.9
1
5-5.9
5-5.9
5-5.9
5-5.91
5
1
1
1
1
4
5-5.9
5-5.9
5-5.9
5
1
6-6.9 7-7.9 8-8.9
8-6.9 7-7.9 6-8.9
6-6.9 7-7.9 6-8.9
8-6.9 7-7.9 8-6.9
3
8-6.9 7-7.9 6-8.9
8-6.9 7-7.9 8-8.9
2
3
8-6.9 7-7.9 8-8.9
8-6.9 7-7.9 8-8.9
1
354
1
1 1
1
1 1 1
1 . 2
2
5
1 5 3
8-9.9 7-7.9 8-8.9
6-6.9 7-7.9 8-6.9
9-9.9 7-7.9 6-8.9
1
334
646
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
1
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
1 . . .
11 .
11 .
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
1
1 . .
1 2 1
2 1 1
2 '. . \
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
9-9.9 10-10.9 11-11.9 12-12.9
1 . 1 .
1 . 1 .
15.1
13-13.9 14-14.9 15-15.9 19-18.9 17-17.9 16-18.9 19-19.9 20-20.9 29-25.9 37-374
13-13.9 14-14.9 15-15.9 16-15.9 17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-37.9
1 ... ... . .
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 16-18.9 19-19.9 20-20.9 26-28.9 37475
13-13.9 14-14.9 15-15.9 18-18.9 17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-375
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-18.9 19-19.9 20-20.9 29-26.9 37-379
13-13.9 14-14.9 15-15.9 19-19.9 17-17.9 18-18.9 19-19.9 20-20.9 28-28.9 37-37-9
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 16-18.9 19-19.9 20-20.9 26-26.9 37-375
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 3737.9
13-13.9 14-14.9 15-15.9 19-18.9 17-17.9 16-18.9 19-19.9 20-20.9 28-26.9 37-375
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 16-18.9 19-19.9 20-20.9 28-28.9 37-375
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-18.9 19-19.9 20-20.9 28-26.9 37-375
1 I I 1 I 1 I 1 I 1 1 1 I i I 1 I 1 I 1 I ] I i I 1 II f I II 11 I I II
Agua Hedionda Lagoon Fish Size Data
July 1994
Species: Quletula y-cauda
Section StaBon
C S2
S4
S6
O B1
Total Weight (gms)
0.71
2.28
0.1
Total Count
29
40
1
Species: QHchlnys mirabWs
Section Station
S4
0 Bt
Total Weight (gms)
10.1
Total Count
11
Species: Parallchthys ealfomlous
Section StationC B4
C SI
C S2
02
S3
S4
S6S7
0 B1
Total Weight (gms)
1.84
53
14.9
124.7
19.3
75
125
150.2
Species: Pleuronlchtnys ritteriSection Station Total Weight (gms)
0 B1 41
Species: Hypsopsetta guttulata
Section Staton
C SI
C S2
O2S3
S4
Total Weight (gms)
32
228.1
19165
7
Total Count
1
3
4
7
3
2
22
1
Total Count1
Total Count
3
9
11
1
Counts by Size Class (cm)
0-0.9 1-1.9
5
39
1
2-2.9 3-3.9 4-4.9 5-5.9 6-6.9
1 1 ...
4 ....
1 ....
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9 13-13.9
Counts by Size Class (cm)
0-0.9 1-1.9
1
2-2.9 3-3.9 4-4.9 5-5.9 6-6.9
1
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9 13.13.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9 4-4.9 5-5.9 6-6.9
1
1
1 2
1
1 ....
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9 4-4.9 5-5.9 6-6.9
7-7.9 6-8.9 9-9.9 10-10.9 11-11.9 12-12.9
! . ii ...
12. 31
1.1.
11
11..
7-7.9 6-8.9 9-9.9 10-10.9 11-11.9 12-12.91
13-13.9
1
1
13-13.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9 4-4.9 5-58 6-6.9
'. '. '. 1 3
'. . . 1
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
3 ...
1.1. . 1
1 . . .
13-13.9
14-14.9 15-15.9
14-14.9 15-15.9
14-149 15-15.9
17-17.9 16-16.9 19-19.9 20-20.9
16-16.9 19-19.9 20-20.9
17-17.9 18-18.9 19-19.9 20-20.9
29-26.9 37-375
26-26.9 37-375
26-26.9 37-37.9
14-14.9 15-15.9
14-14.9 15-15.9 16-16.9
1
17-17.9 18-18.9 19-19.9 20-20.9
19-19.9 20-20.9
26-26.9 37-373
26-26.9 37-37:9
IlliVllilliilillllflllilKl I 1 II II
Agua Hedionda Lagoon Fish Size Data
April 1995
Spedes : Anchoa compressa
Section Station Total Weight (gms)S4 3.5
Species: Engrauldae (< 50 mm)
Section Station Total Weight (gnu)
1 O2 U
Species: Fundukis pirvferrts
Section Station Total Weight (gmi)
SJ 7
S4 3.2
S5 0.3
SS 4
S7 155
Species: Alherinops aflW*
Section Station Total Weight (gnu)
C S1 0.85
C S2 35.95
S3 3.6
S4 3
S5 12.6S9 1.4
S7 2
Species: Alherinldae (< 25 mm)
Section Station Total Weight (gms)
C S1 13.45
C S2 23.5B7 0.05
S3 0.7
S4 0.7S5 52.9
se 02
S7 3.1
Species: Syngnalhus sp.
Section Station Total WeigM (gms)
C S1 14
C S2 5.65
S3 2.1
I S4 1.«5
Species: Leptocottus armatus
Section Station Total Weight (gms)
C S1 85.2
C S2 57.6S3 21
1 S4 48.5
1 S6 1.6
I S7 4.5
Species: Paralabrax macuUtofasclatus
Section SUtlon Total Weight (gms)C B4 93.3
C BS 18
C S1 89.4
C S2 23.7
S7 0.1
Species: Cymatogaster aggregata
Section Station Total Weight (gms)
C B4 2.5
C BS 5
C S1 86.7
C S2 0.65
O2 49
S4 10.1
Species: HypsobtennKis genius
Section Station Total Weight (gms)
C St 10.3
Total Count1
Total Count
58
Total Count
1
21
1
30
Total Count
12
49
18
1449
7
8
Total Count
184
1971
5
11159S
11
74
Total Count
30
16
3
3
Total Count
12
7
311
21
Total Count2
5
24
7
t
Total Count
1
3
35
2
10
7
Total Count
9
Counts by Size Class (em)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
1
Counts by Size Class (cm)0-0.9 1-1.9 2-2.9
3
It
14
1230
4
2
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
1
Counts by Size Class (cm)0-0.9 1-1.9 2-2.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
'. t
Counts by Size Class (em)
0-0.9 1-1.9 2-2.9
4
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
3-3.9
3-3.9
1-3.9
1
3-3.9
1
6
2
2
193
5
3-3.9
3-3.g
3-3.9
3-3.9
1
1
1
3-3.9
1
29
2
7
5
3-39
3
4-4.9
4-4.9
4-4.9
1
1
4-4.9
22
4-4.9
4-4.9
2
- 1
4-4.9
15
2
4-4.9
i
6
1
4-4.9
1
1
2
2
4-4.96
5-5.9
5-5.9
5-5.9
5
5-5.9
10
5-5.9
5-5.9
1
5-5.91
2
5-5.9
10
3
5-5.9
t
5-5.9
6-6.9
6-6.9
6-6.9
1
i
19
6-6.9
6-6.9
6-6.9
34
1
6-6.95
21
2
1
9-6.91
2
5
1
6-6.9
6-6.9
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
1 ...
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
5 ...
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
2342 1 2
3221 2 .
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
33..
221.
1 . . .
11. . .
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
1 ...
2 ... . .
1 ... . .
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
2 . . .
1
7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
13-13.9 14-14.9 15-15.9 16-16.9
13-13.9 14-14.9 15-15.9 16-16.9
13-13.9 14-14.9 15-15.9 16-16.9
13-13.9 14-14.9 15-15.9 18-16.9
13-13.9 14-14.9 15-15.9 16-16.9
13-139 14-14.9 15-15.9 16-16.9
13.1
1
1 2
13-13.9 14-14.9 15-15.9 16-16.9
13-13.9 14-14.9 15-15.9 16-16.9
13-13.9 14-14.9 15-15.9 16-16.9
13-13.9 14-14.9 15-15.9 16-18.9
17-17.9 18-18.9 19-19.9 20-209 26-26.9 37-37.9
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-37.9
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-37.9
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-372
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-37.9
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-373
3 . . 1 . .
1.1. . .
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-37.9
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37-372
17-17.9 18-18.9 19-19.9 20-20.9 26-26.9 37472
17-17.9 18-18.9 19-19.9 20-20.9 28-26.9 37-372
I 1 I I I 1 I 1 I } I 1 I ] I I I 1 I I I 1 I 1 I 1 I 1 I 1 I J I i I I
Agua Hedionda Lagoon Fish Size Data
April 1995
Species: Heterostichus rostratus
Section Station Total Weight (gms)
C B4 0.35C B5 0.15
S1
S2
3.3
1.7
Species: Cleveland los
Section Station Total Weight (gins)S1
S2
B8
S3
S4
S5
S8
S7
3
4.2
0.2
0.2
4.9
4
8.4
3.4
Species: Acanftogobhis flavimanus
Section Station Total Weight (gms)
S1
S2
S3
S4
S5
S9
S7
1.5
2.9
35.1
73.9
3.9
16.1
8.8
Species: llypnus gflberti
Section Station Total Weight (gms)
C St 1,7
C S2 2.8
I B9 0.2
Species: Quietula y-eauda
Section Station Total Weight (gms)
C S2 1.3
I B7 0.5
I S4 7.3
I S5 1.1
O B1 0.3
Species: GJtichthyl mirabls
Section Station Total Weight (gms)
S1
S3
S4
S5
10.1
2
15.1
1
Species: OobMae (< 25 mm)Section Station Total Weight (gms)
C
C
C
C
C
D
B3
B4B5S1
S2
B9
B7
B8B9
02
S3
S4
S5
SB
S7B1
1.4
0.30.4
2.65
2.50.5
2
2.10.2
0.05
0.2
3.75
52.6
72.39
0.5
Species: Cltharichthys stlgmaeus
Section Station Total Weight (gms)
O O1 7
Total Count
23
9«
Total Count10
191
1
20
18
55
IB
Total Count1
4
23eo
141«IS
Total Count5
81
Total Count5
2
22
31
Total Count
20
4
17
4
Total Count
216
6
22
2913
3539
31
3
33
1030
771
2027
Total Count1
Count! by Size Class (cm)
0-0.9 1-1.9 2-2.9
1
Counts by Sizt Class (em)
0-0.9 1-1.9 2-2.99
3
t
117
14
50
17
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
'. . t
1
5
8
3
Counts by Slz« Class (cm)
0-0.9 1-1.9 2-2.93
3
1
Counts by Size Class (em)
0-0.9 1-1.9 2-2.9
32
11
! '. i
Counts by Size Class (cm)
0-0.9 1-18 2-2.9
7
t
3
t 2
Counts by Size Class (cm)0-0.9 1-1.9 2-2.9
! 2 '.
t
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9
3-3.9 4-4.9 5-S.9 6-9.9 7-7.9 9-B.9 9-9.9 10-10.9 11-11.9 12-12.9
1.1.....
3 ......
5 3 1 .....
4.1.....
3-3.9 4-4.9 5-5.9 <-t.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
1 .....
13 .......
3 '. '. '. '. '. '. . '.
4 .......
5 .......
1 .......
3-3.9 4-4.9 5-5.9 9-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
1 ......
2.1.....
3 10 8 1 ....
37 26 10 2 ....
9 .......
0 9 2 2 ...8 4 ......
3-3.9 4-4.9 5-5.9 9-9.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
2 .......
5 .......
3-3.9 4-4.9 5-5.9 9-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11. 8 12-12.9
2 .......
tt .......
3 .......
3-3:9 4-4.9 5-5.9 9-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-129
12 1 ......
3 .......
7 5 1 1 ....
1 .......
3-3.9 4-4.9 5-5.9 6-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
1 .......
3-3.9 4-4.9 5-5.9 6-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9
1 ... . .
13-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-18.9 19-19.9 20-20.9
13-13.9 14-14.9 15-15.9 19-16.9 17-17.9 18-18.9 19.19.9 20-20.9
1J-13.9 14-14.9 15-15.9 16-16.9 17-17.9 18-18.9 19-19.9 20-20.9
13-13.9 14-14.9 15-15.9 19-19.9 17-17.9 18-18.9 19-19.9 20-20.9
13-13.9 14-14.9 15-15.9 19-16.9 17-17.9 18-18.9 19-19.9 20-20.9
13-13.9 14-14.9 15-15.9 19-19.9 17-17.9 18-18.9 19-19.9 20-20.9
13-13.9 14-14.9 15-15.9 19-16.9 17-17.9 18-18.9 19-19.9 20-20.9
13-13.9 14-14.9 15-15.9 19-19.9 17-17.9 18-18.9 19-19.9 20-20.9
29-26.9 37-37.9
29-28.9 37-37.9
26-26.9 37-379
26-26.9 37-37.9
26-26.9 37-37S
29-26.9 37-37*
28-29.9 37-373
r i r i r i r i r i r i r i r i i i r i r i i i i i t i r i
Agua Hedionda Lagoon Fish Size Data
April 1995
Species: Paralichthys eaffomieus
Section Station
C B3
C B4
C S1
C S2
B6
B7
S3
S7
0 B1
0 O1
Total Weight (gms)
114.1
244.15
22.3
80.3
0.15
70
13
5
0.05
50
Total Count
5
6
11
8
2
Species: Pleuronichthys ritteri
Section Station
C B3
Total Weight (gms)
0.1
Total Count
1
Species: Hypsopsetta guttulata
Section Station
C B5
C S1
2 S2
S4
S5
S9
S7
Total Weight (gms)
38
85.6
40.25
34.357.2
8.15
43.55
Total Count
1
35
17
19
1725
31
3
Species: Symphunj* ablcauda
Section Station
C B3
Total Weight (gms)
3
Total Count
1
Counts by Size Class (em)
0-0.9
1
1-1.91
2
1
1
2-2.9
4
2
1
3-3.9
2
1
Counts by Size Class (em)
0-0.9 1-1.9
1
2-2.9 3-3.9
4-4.9 5-5.9 6-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9 13-13.9 14-14.9 15-15.9 16-16.9
2 .... .11.
11..
1 . . 1 1 . . . . . . .
1211. ....
....... . '. ... 1
1 . . ....
1 . . ...
1
4-4.9 5-5.9 6-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9 13-13.9 14-14.9 15-15.9 16-16.9
17-17.9 18-19.9
1 1
17-17.9 18-18.9
Counts by Size Class (cm)
0-0.9 1-1.9
10
2
1
15
19
1
2-2.9
9
8
4
8a
3-3.9
3
1
5
1
4
4-4.9 5-5.9 6-6.9 7-7.9 8-8.9 9-9.9 10-10.9 11-11.9 12-12.9 13-13.9 14-14.9 15-15.9 19-18.9
1 ....
3424... .. ...
1 2 1 2 ... . . . . .
232.... .. ...1 ...... . . . . .
1 ..... .1 ...
17-17.9 19-18.9
Counts by Size Class (cm)
0-0.9 1-1.9 2-2.9 3-3.9 4-4.9 5-5.9 6-6.9 7-7.9 9-8.9 9-9.9 10-10.9 11-11.9 12-12.9 13-13.9 14-14.9 15-15.9 16-16.9
1 ... . . ....
17-17.9 19-19.9
19-19.9 20-20.9 26-J0.9 37-37.9
19-19.9 20-20.9
19-19.9 20-20.9
26-29.9 37-375
26-26.9 37-37.9
19-19.9 20-20.9 26-29.9 3747.9
mi
i
C.1 Macro in vertebrate Density Data by Lagoon
Section, Station, and Survey
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
Outer Lagoon
July 1994
B1 82
Eudendrium sp. 0.004
Actiniaria 0.020
Prosthiostomum latocelis 0.004
Aphrodita armifera 0.004
Harmothoe hirsuta 0.024
Paleanotus bellis 0.004
Hesionidae 0.004
Amphiduros pacificus 0.004
Exogone lourei 0.020
Odontosyllis phosphorea 0.004
Platynereis bicanaliculata 0.004
Diopatra spp. 0.004
Leitoscoloplos pugettensis 0.004
Spiophanes missionensis 0.004
Polyophthalmus pictus 0.008
Mediomastus sp. 0.004
Ampharete labrops 0.004
Pista alata 0.012
Euchone limnicola 0.004
Oligochaeta 0.004
Tricolia sp. 0.024
Macrarenesp. 0.016
Alvania rosana 0.004
Asperiscala sp. 0.004
Crepidula sp. 0.032
Acanthina spinata 0.024
Aliacarinata 0.136
Olivella baetica 0.008
Granulina margaritula 0.004
Kurtziella plumbea 0.004
Ophiodermella incisa 0.004
Conus califomicus 0.012
Navanax inermis 0.008
Bulla gouldiana 0.032
Haminaea vesicula 0.008
Mytilus galloprovincialis 0.020
Modiolussp. 0.012
Leptopecten latiauratus 0.008
Limaria hemphilli 0.004
Laevicardium substriatum 1.456
Tellina sp. 0.004
Theora lubrica 0.004
Venerupis phillipinarum 0.008
Hiatella arctica 0.004
Anoplodactylus erectus 0.008
Anoplodactylus califomica
Anoropallene palpida 0.020
Parasterope bamesi 0.004
Metamysidopsis elongata 0.004
Zeuxo sp. 0.020
Leptochelia dubia 0.112
Leptochelia cf. sp. B 0.016
Paracerceis sculpta 0.148
Neastacilla califomica 0.004
Aoroides cf. secunda 0.024
Acuminodeutopus heteruropus 0.020
Corophium spp. 0.012
Ericthonius brasiliensis . 0.024
Grandidierella japonica 0.012
Pontogeneia rostrata 0.028
Elasmopus sp. 0.008
Hyalesp. 0.016
0.003
0.010
0.003
0.003
0.010
0.003
0.003
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
Outer Lagoon
July 1994 - Continued
Photis sp. 0.004
Gammaropsis thompsoni 0.036
Monoculodes hartmanae 0.004
Podocerus spp. 0.112
Stenothoe estacola 0.004
Mayerella banksia 0.008
Caprella califomica 0.004
Palaemonella holmes! 0.032
Neocrangon zacae 0.004
Pagurusspp. 0.128
Loxomynchus spp. 0.012
Cancer sp. 0.004
Cancer anthonyi 0.004
Lophopanopeus sp. 0.084
Membranipora sp. (colonial) 0.004
Microporina sp. (colonial) 0.004
Thalamoporella California (colonial) 0.004
Ophiuroidea 0.008
Amphiodia digitata 0.012
Amphipholis spp. 0.008
Amphipholis squamata 0.008
Ophiothrix spiculata 0.004
Parastichopus parvimensis 0.004
TOTAL 2.960
Number of species 80.000
0.003
0.007
0.003
0.050
10.000
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
Middle Lagoon
July 1994
B3 B4 B5
Notoacmea dipicta
Crepidula sp.
Crepidula onyx
Alia carinata
Nassarius tegula
Conus califomicus
Navanax inermis
Bulla gouldiana
Haminaea vesicula
Mytilus galloprovincialis
Pecten sp.
Argopecten circularis
Leptopecten latiauratus
Laevicardium substriatum
Chione undatella
Leptochelia dubia
Paracerceis sculpta
Amphilochus neapolitanus
Ampithoe spp.
Acumlnodeutopus heteruropus
Corophium spp.
Ericthonius brasiliensis
Pontogeneia rostrata
Elasmopus sp.
Hyale sp.
Podocerus spp.
Periclimenes infraspinus
Hippolyte califomiensis
Hemigrapsus oregonensis
Lytechinus pictus
TOTAL
Number of species
0.004
0.004
0.044
0.052
3.000
0.008
0.016
0.048
0.028
0.020
0.004
0.064
0.004
0.004
0.004
0.004
0.188
0.008
0.024
0.012
0.220
0.008
0.052
0.576
0.064
0.008
3.052
0.304
0.088
0.004
4.812
25.000
0.016
0.012
0.012
0.012
0.016
0.004
0.004
0.200
0.004
0.008
0.108
0.024
0.004
0.424
13.000
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
West Inner Lagoon
July 1994
B6 B9
Notoacmea dipicta . 0.010
Alia carinata . 0.023
Nassarius tegula 0.008 0.067
Bulla gouldiana 0.532 0.720
Mytilus galloprovincialis 0.004 0.027
Musculista senhousi 0.008
Leptopecten latiauratus 0.004 0.020
Laevicardium substriatum . 0.113
Tellina sp. B (SCAMIT) . 0.007
Chione fluctifraga . 0.003
Chione undatella . 0.003
Cyclopoida (copepod) . 0.007
Zeuxo sp. . 0.003
Paracerceis sculpta . 0.817
Amphilochus neapolitanus . 0.037
Ampithoe spp. . 0.400
Corophium spp. . 0.323
Ericthonius brasiliensis . 0.493
Pontogeneia rostrata . 0.027
Elasmopus sp. . 0.003
Hyalesp. . 1.807
Gammaropsis thompsoni . 0.007
Podocerus spp. . 1.840
Hippolyte califomiensis 0.008 0.073
TOTAL 0.564 6.830
Number of species 6.000 23.000
East Inner Lagoon
July 1994
B7 B8
Leitoscoloplos pugettensis . 0.004
Nassarius tegula 0.120
Navanax inermis 0.012
Bulla gouldiana 0.048
Musculista senhousi 0224 0.136
Tagelus affinis 0.008
Theora lubrica 0.004
Chione fluctifraga 0.008
Paracerceis sculpta 0.008
Ampithoe spp. 0.016
Grandidierella japonica 0.016
Periclimenes infraspinus 0.012
Hemigrapsus oregonensis . 0.012
TOTAL 0.476 0.152
Number of species 11.000 3.000
mi
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
Outer Lagoon
April 1995
B1
Halecium sp. 0.005
Exogone lourei
Lumbrineris spp. 0.005
Leltoscoloplos pugettensis 0.010
Polydora ligni 0.005
Pseudopolydora paucibranchiata
Mediomastus sp. 0.005
Pistaalata 0.010
Euchone limnicola 0.015
Cerithiopsis sp.
Crepidula sp. 0.005
Alia carinata 0.040
Olivella biplicata 0.010
Olivella baetica 0.035
Acteocina inculta 0.010
Melanochlamys diomedea 0.005
Bulla gouldiana 0.005
Haminaea vesicula 0.010
Musculista senhousi 0.020
Laevicardium substriatum 0.015
Mactra sp. 0.005
Mactra nasuta
Ensis myrae
Tellina sp. B (SCAMIT) 0.010
Theora lubrica 0.025
Transennella sp.
Venerupis phillipinarum
Cooperella subdiaphana
Thracia curta
Anoplodactylus erectus 0.015
Aoroides cf. secunda 0.005
Hippolyte califomiensis 0.010
Crangon nigromaculata 0.005
Filicrisia sp. (colonial) 0.005
Membranipora tuberculata (colonial) 0.005
Thalamoporella California (colonial) 0.005
Tricellaria sp. (colonial) 0.005
Astropecten armatus
Amphiodia urtica 0.005
Leptosynapta sp. 0.005
TOTAL 0.315
Number of species 30.000
B2
0.005
0.005
0.005
0.010
0.090
0.055
0.030
0.395
0.035
0.010
0.005
0.020
0.030
0.005
0.005
0.015
0.005
0.005
0.005
0.735
18.000
mm
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
Middle Lagoon
April 1995
Stylochus exiguus
Stylochoplana sp.
Notoplana sp.
Tubulanus frenatus
Eumida sp.
Exogone lourei
Platynereis bicanaliculata
Nephtys caecoides
Leitoscoloplos pugettensis
Prionospio heterobranchia
Diplocirrus sp.
Armandia brevis
Melinna oculata
Pista fasciata
Euchone limnicola
Serpulidae
Nitidiscala sp.
Crepidula sp.
Crepidula onyx
Nassarina penicillata
Alia carinata
Nassarius mendicus
Nassarius tegula
Olivella baetica
Conus califomicus
Acteocina eximia
Acteocina inculta
Navanax inermis
Bulla gouldiana
Haminaea vesicula
Bivalvia
Nuculana taphria
Musculista senhousi
Laevicardium substriatum
Mactra sp.
Mactra nasirta
Cumingia califomica
Theora lubrica
Venerupis phillipinarum
Chione fluctifraga
Chione undatella
Cooperella subdiaphana
Anoplodactylus erectus
Diastylis sp.
Monoculodes hartmanae
Palaemonella holmes!
Hippolyte califomiensis
Crangon sp.
Crangon nigricauda
Crangon alaskensis
Crangon nigromaculata
Pagurus spp.
Loxorhynchus spp.
Bowerbankia sp. (colonial)
Crisia sp. (colonial)
Membranipora sp. (colonial)
Lagenipora sp. (colonial)
Amphiodia urtica
Lytechinus pictus
Dendraster excentricus
Ascidiacea
TOTAL
Number of species
B3 B4 B5
0.007
0.013
0.007
0.007
0.007
0.033
0.040
0.053
0.007
0.007
0.007
0.080
0.013
0.007
0.007
0.013
0.007
0.007
0.007
0.007
0.207
0.007
0.007
0.007
0.007
0.007
0.287
0.007
0.867
26.000
0.007
0.007
0.007
0.007
0.007
0.007
0.040
0.013
0.007
0.040
0.007
0.007
0.007
0.047
0.007
0.227
0.007
0.393
0.100
0.013
0.027
0.033
2.007
0.013
0.007
0.007
0.007
0.973
0.047
0.067
0.027
0.013
0.007
0.007
0.040
0.007
0.007
0.007
0.013
4.267
38.000
0.010
0.005
0.005
0.010
0.035
0.030
0.105
0.025
0.010
0.005
1.265
0.115
0.005
0.010
0.010
0.010
0.005
0.015
1.675
18.000
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
West Inner Lagoon
April 1995
Leitoscoloplos pugettensis
Prionospio heterobranchia
Diplocirais sp.
Armandia brevis
Pista alata
Euchone limnicola
Alia carinata
Nassarius tegula
Acteocina inculta
Navanax inermis
Bulla gouldiana
Haminaea virescens
Musculista senhousi
Laevicardium substriatum
Tellina sp. B (SCAMIT)
Theora lubrica
Chione undatella
Anoplodactylus erectus
Mysida
Ampithoe spp.
Grandidierella japonica
Palaemonella holmes!
Hippolyte califomiensis
Leptosynapta sp.
TOTAL
Number of species
B6
0.020
0.005
0.005
0.010
0.005
0.025
0.005
0.045
0.010
0.005
0.045
0.010
0.020
0.245
0.030
0.050
0.010
0.265
0.005
0.005
0.020
0.020
0.005
0.865
23.000
B9
0.010
0.010
0.010
0.010
0.010
0.020
0.060
0.010
0.010
0.020
0.170
10.000
mm
mm
m
Agua Hedionda Lagoon Macroinvertebrate Data
Density per m2 by Gear Type and Station
East Inner Lagoon
April 1995
Lumbrineris spp.
Leitoscoloplos pugettensis
Polydora ligni
Pista alata
Euchone limnicola
Notoacmea dipicta
Nassarius tegula
Acteocina inculta
Melanochlamys diomedea
Bulla gouldiana
Haminaea vesicula
Bivalvia
Musculista senhousi
Laevicardium substriatum
Mactra sp.
Tellina sp. B (SCAMIT)
Cumingia califomica
Theora lubrica
Cooperella subdiaphana
Anoplodactylus erectus
Mysida
Paracerceis sculpta
Cymothoidae
Palaemonella holmesi
Hippolyte califomiensis
Loxorhynchus spp.
Leptosynapta sp.
TOTAL
Number of species
B7
0.040
0.080
0.010
0.170
0.060
4.740
0.430
0.010
0.260
0.160
0.020
0.010
0.030
0.140
0.030
0.030
0.200
0.010
0.010
0.030
0.010
6.480
20.000
B8
0.010
0.010
0.050
0.010
0.040
0.370
0.010
0.880
0.010
0.120
0.040
0.030
0.020
0.020
0.020
0.010
1.650
16.000
I
C.2 Macroinvertebrate Total Count Data by
Lagoon Section, Station, and Survey
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
Outer Lagoon
July 1994
B1 B2
Eudendrium sp. 1
Actiniaria 5
Prosthiostomum latocelis 1
Aphrodita armifera 1
Harmothoe hirsuta 6
Paleanotus bellis 1
Hesionidae 1
Amphiduros pacificus 1
Exogone lourei 5
Odontosyllis phosphorea 1
Platynereis bicanaliculata 1
Oiopatra spp. 1
Leitoscoloplos pugettensis 1
Spiophanes misslonensls 1
Polyophthalmus pictus 2
Mediomastus sp. 1
Ampharete labrops 1
Pista alata 3
Euchone limnicola 1
Oligochaeta 1
Tricolia sp. 6
Macrarene sp. 4
Alvania rosana 1
Asperiscala sp. 1
Crepidula sp. 8
Acanthi na splnata 6 1
Alia carinata 34
Olivella baetica 2
Granulina margaritula 1
Kurtziella plumbea 1
Ophiodermella incisa 1
Conus califomicus 3 3
Navanax inermis 2 1
Bulla gouldiana 8
Haminaea vesicula 2
Mytilus galloprovincialis 5
Modiolus sp. 3
Leptopecten latiauratus 2 1
Limaria hemphilli 1
Laevicardium substriatum 364 3
Tellina sp. 1
Theora lubrica 1
Venerupis phillipinaaim 2
Hiatella arctica 1
Anoplodactylus erectus 2
Anoplodactylus califomica . 1
Anoropallene palpida 5
Parasterope bamesi 1
Metamysidopsis elongata 1
Zeuxo sp. 5
Leptochelia dubia 28
Leptochelia cf. sp. B 4
Paracerceis sculpta 37 1
Neastacilla californica 1
Aoroides cf. secunda 6
Acuminodeutopus heteruropus 5
Corophium spp. 3
Ericthonius brasiliensis 6
Grandidierella japonica 3
Pontogeneia rostrata 7
Elasmopus sp. 2
Hyale sp. 4
Photis sp. 1
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
Outer Lagoon
July 1994-Continued
Gammaropsis thompsoni 9
Monoculodes hartmanae 1
Podocerus spp. 28
Stenothoe estacola 1
Mayerella banksia 2
Caprella califomica 1
Palaemonella holmesi 8 1
Neocrangon zacae 1
Pagurus spp. 32 2
Loxorhynchus spp. 3
Cancer sp. 1
Cancer anthonyi 1
Lophopanopeus sp. 21
Membranipora sp. (colonial) 1
Microporina sp. (colonial) 1
Thalamoporella California (colonial) 1
Ophiuroidea 2
Amphiodia digitata 3
Amphipholis spp. 2
Amphipholis squamata 2
Ophiothrix spiculata 1 1
Parastichopus parvimensis 1
TOTAL 740 15
Number of species 80 10
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
Middle Lagoon
July 1994
B3 B4 B5
Notoacmea dipicta . 2
Crepidulasp. . 4
Crepidula onyx . . 4
Aliacarinata 1 12 3
Nassarius tegula . 7 3
Conus califomicus . 5 3
Navanax inermis . 1
Bulla gouldiana . 16 4
Haminaea vesicula . 1
Mytilus galloprovincialis . 1
Pectensp. . 1
Argopecten circularis . . 1
Leptopecten latiauratus . 1 1
Laevicardium substriatum . 47 50
Chione undatella . . 1
Leptochelia dubia . 2
Paracerceis sculpta . 6
Amphilochus neapolitanus . 3
Ampithoe spp. . 55
Acuminodeutopus heteruropus . 2
Corophium spp. . 13
Ericthonius brasiliensis . 144
Ponlogeneia rostrata . 16
Elasmopus sp. . 2
Hyalesp. 1 763
Podocerus spp. . 76
Periclimenes infraspinus . . 2
Hippolyte califomiensis 11 22 27
Hemigrapsus oregonensis . . 6
Lytechinus pictus . 1 1
TOTAL 13 1203 106
Number of species 3 25 13
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
West Inner Lagoon
July 1994
B6 B9
Notoacmea dipicta . 3
Alia carinata . 7
Nassarlus tegula 2 20
Bulla gouldiana 133 216
Mytilus galloprovincialis 1 8
Musculista senhousi 2
Leptopecten latiauratus 1 6
Laevicardium substriatum . 34
Tellina sp. B (SCAMIT) . 2
Chione fluctifraga . 1
Chione undatella . 1
Cyclopoida (copepod) . 2
Zeuxo sp. . 1
Paracerceis sculpta . 245
Amphilochus neapolilanus . 11
Ampithoe spp. . 120
Corophium spp. . 97
Ericthonius brasiliensis . 148
Pontogeneia rostrata . 8
Elasmopus sp. . 1
Hyale sp. . 542
Gammaropsis thompsoni . 2
Podocerus spp. . 552
Hippolyte califomiensis 2 22
TOTAL 141 2049
Number of species 6 23
East Inner Lagoon
July 1994
B7 B8
Leitoscoloplos pugettensis . 1
Nassarius tegula 30
Navanax inermis 3
Bulla gouldiana 12
Musculista senhousi 56 34
Tagelus affinis 2
Theora lubrica 1
Chione fluctifraga 2
Paracerceis sculpta 2
Ampithoe spp. 4
Grandidierella japonica 4
Periclimenes infraspinus 3
Hemigrapsus oregonensis . 3
TOTAL 119 38
Number of species 11 3
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
Outer Lagoon
April 1995
B1 B2
Halecium sp. 1
Exogone lourei . 1
Lumbrineris spp. 1
Leitoscoloplos pugettensis 2
Polydora ligni 1
Pseudopolydora paucibranchiata . 1
Mediomastus sp. 1
Pista alata 2
Euchone limnicola 3
Cerithiopsis sp. . 1
Crepidula sp. 1
Alia carinata 8 2
Olivella blplicata 2
Olivella baetica 7
Acteocina inculta 2 18
Melanochlamys diomedea 1
Bulla gouldiana 1
Haminaea vesicula 2 11
Musculista senhousi 4 6
Laevicardium substriatum 3 79
Mactra sp. 1 7
Mactra nasuta . 2
Ensis myrae . 1
Tellina sp. B (SCAMIT) 2 4
Theora lubrica 5 6
Transennella sp. . 1
Venerupis phillipinarum . 1
Cooperella subdiaphana . 3
Thracia curta . 1
Anoplodactylus erectus 3
Aoroides cf. secunda 1
Hippolyte califomiensis 2
Crangon nigromaculala 1
Filicrisia sp. (colonial) 1
Membranipora tuberculata (colonial) 1
Thalamoporella California (colonial) 1
Tricellaria sp. (colonial) 1
Astropecten armatus . 1
Amphiodia urtica 1
Leptosynapta sp. 1 1
TOTAL 63 147
Number of species 30 18
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
Middle Lagoon
April 1995
B3 B4 B5
Stylochus exiguus . 1
Stylochoplana sp. . 1
Notoplanasp. 1
Tubulanus frenatus . 1
Eumidasp. 2
Exogone lourei . 1
Platynereis bicanaliculata . 1 .
Nephtys caecoides . 1
Leitoscoloplos pugettensis . 6 2
Prionospio heterobranchia . 2 1
Diplocirrus sp. . 1
Armandia brevis . 6
Melinna oculata . 1
Pista fasciata . . 1
Euchone limnicola . 1 2
Serpulidae 1
Nitidiscala sp. 1 1
Crepidulasp. 1
Crepidula onyx . 7 7
Nassarina penicillata . 1
Aliacarinata 5 34 6
Nassarius mendicus . 1
Nassarius tegula 6 59 21
Olivella baetica 8
Conus califomicus . 15 5
Acteocina eximia . 2
Acteocina Inculta . 4 2
Navanax inermis . 5 1
Bulla gouldiana 1 301 253
Haminaea vesicula 1 2
Bivalvia 1 1
Nuculana taphria . 1
Musculista senhousi . 1
Laevicardium substriatum 12 146 23
Mactrasp. . 7 1
Mactra nasuta 2
Cumingia califomica 1
Theora lubrica . 10 2
Venerupis phillipinarum 1 . 2
Chione fluctifraga 2
Chione undatella . 4 2
Cooperella subdiaphana . 2
Anoplodactylus erectus . . 1
Diastylissp. . 1
Monoculodes hartmanae 1
Palaemonella holmes! 1 1
Hippolyte californiensis . 6 3
Crangon sp. 1 . .
Crangon nigricauda . 1
Crangon alaskensis 1
Crangon nigromaculata 31
Pagurusspp. . 1
Loxorhynchus spp. 1
Bowerbankia sp. (colonial) 1
Crisia sp. (colonial) 1
Membranipora sp. (colonial) 1
Lagenipora sp. (colonial) 1
Amphiodia urtica . 1
Lytechinus pictus . 2
Dendraster excentricus .43
Ascidiacea 1
TOTAL 130 640 335
Number of species 26 38 18
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
West Inner Lagoon
April 1995
B6 B9
Leitoscoloplos pugettensis 4 1
Prionospio heterobranchia 1
Diplocirrus sp. 1
Armandia brevis 2
Pista alata 1
Euchone limnicola 5 1
Alia carinata 1
Nassarius tegula 9
Acteocina inculta 2
Navanax inermis 1 1
Bulla gouldiana 9 1
Haminaea virescens 2
Musculista senhousi 4 1
Laevicardium substriatum 49 2
Tellina sp. B (SCAMIT) 6 6
Theora lubrica 10 1
Chione undatella . 1
Anoplodactylus erectus 2
Mysida 53
Ampithoe spp. 1
Grandidierella japonica 1
Palaemonella holmesi 4
Hippolyte califomiensis 4
Leptosynapta sp. 1 2
TOTAL 173 17
Number of species 23 10
Agua Hedionda Lagoon Macroinvertebrate Data
Total Counts by Gear Type and Station
East Inner Lagoon
April 1995
B7 B8
Lumbrineris spp. . 1
Leitoscoloplos pugettensis 4 1
Polydora ligni . 5
Pista alata . 1
Euchone limnicola 8 4
Notoacmea dipicta 1
Nassarius tegula 17 37
Acteocina inculta 6
Melanochlamys diomedea . 1
Bulla gouldiana 474 88
Haminaea vesicula 43 1
Bivalvia 1
Musculista senhousi 26 12
Laevicardium substriatum 16 4
Mactra sp. 2
Tellina sp. B (SCAMIT) 1
Cumingia califomica 3
Theora lubrica 14 3
Cooperella subdiaphana 3
Anoplodactylus erectus 3
Mysida 20 2
Paracerceis sculpta 1
Cymothoidae 1
Palaemonella holmesi . 2
Hippolyte californiensis 3 2
Loxorhynchus spp. 1
Leptosynapta sp. . 1
TOTAL 648 165
Number of species 20 16
C.3 Sediment Data for Infauna Samples
Agua Hedionda Lagoon Grain Size Data
Benthic Cores (Percent of Total)
April 1995
Lagoon
Section
Outer Lagoon
Outer Lagoon
Middle Lagoon
Middle Lagoon
Middle Lagoon
West Inner Lagoon
West Inner Lagoon
West Inner Lagoon
West Inner Lagoon
East Inner Lagoon
East Inner Lagoon
East Inner Lagoon
East Inner Lagoon
Sediment
Type
Eelgrass Bed
Non-Vegetated
Eelgrass Bed
Bar
Non-Vegetated
Bar
Eelgrass Bed
Non-Vegetated
Non-Vegetated
Eelgrass Bed
Non-Vegetated
Bar
Bar
Station
1
4
5
8
9
12
14
15
18
19
22
23
25
Gravel
0.01
0.08
0.03
0.00
0.03
0.14
0.03
0.03
0.00
0.00
0.15
0.00
0.21
Sand
92.57
80.46
83.37
93.77
97.45
77.25
52.10
88.13
15.34
8.83
23.38
44.90
35.85
Silt
3.90
13.61
8.36
3.46
0.69
12.42
27.88
5.61
31.69
31.12
35.46
25.08
28.14
Clay
3.52
5.85
8.23
2.77
1.83
10.20
19.98
6.23
52.97
60.05
41.01
30.02
35.79
C.4 Infauna Density Data by Lagoon Section,
Station, and Habitat
II it II t 1 II f 1 II I S II I ! II II II fl II If I f 1 I I
Species
Agua Hedionda Lagoon Benthic Infauna Data
Density per m2
Outer Lagoon Middle Lagoon
Eelgrass Bed Non-Vegetated Eelgrass Bed Bar Bar
1234 5678
Non-Vegetated
9 10
Actiniaria ....
Nemertea . . . 127
Lineidae ....
Paranemertes californica ....
Nematoda 127 6621
Polychaeta 382 637
Polynoidae .127
Tenonia priops . 127
Chloeia pinnata . . 127
Phyllodoce longipes ....
Eteone spilotus ....
Eumida sp. 2 ....
Platynereis bicanaliculata ....
Nephtys cornata franciscana ....
Nephtys caecoides ....
Hemipodus borealis ....
Goniada littorea . . . 127
Lumbrineris spp. . 255
Lumbrineris minima . . 127
Schistomeringos rudolphi ....
Scoloplos acmeceps . . . 255
Leitoscoloplos pugettensis . 127
Acmira catherinae ....
Polydora spp. ....
Polydora ligni ....
Polydora nuchalis ....
Prionospio heterobranchia . 637
Apoprionospio pygmaea . . 127 127
Spiophanes missionensis 255 1273 . 127
Rhyncospio glutea 127 127
Pseudopolydora paucibranchiata . 127
Carazziella sp. . 127
Boccardiella sp. ....
Boccardiella hamata ....
Diplocirrus sp. ....
Armandia brevis . 127
Polyophthalmus pictus . 255
Capitellidae 127
Capitella "capitata" ....
Notomastus lineatus ....
Notomastus hemipodus . . 509 255
Mediomastus sp. 255 1655 891
Mediomastus ambiseta . 637 637 127
Mediomastus californiensis ....
Anotomastus gordiodes . 127
Pista sp. ....
Pista alata ....
Euchone limnicola ....
Oligochaeta ....
Caecum californicum 127 764 . 509
Alia carinata ....
Granulina margaritula . 255
Acteocina inculta . 382
127
255
127
4329 127
255
127
127
1146 255
1273
382
255
127 127
127
127
1910
509
764 255
1783
1146
127
127
382 3056 1655 127
127
127 127 . 127
127
8021 4074
127
127 127
1 ' * II 1 I ' i 1 i 1 I J I I I 1 I I I 1 I I I I I 1 I I I I I I I I 1 i
Agua Hedionda Lagoon Benthic Infauna Data
Density per m2
Outer Lagoon Middle Lagoon
Eelgrass Bed Non-Vegetated Eelgrass Bed Bar Bar Non-Vegetated
Species 1234 56789 10
Philine sp. A .... ......
Haminaea vesicula . 127 . ......
Bivalvia . 127 . . ......
Mytilus galloprovincialis .... ......
Musculista senhousi .... ......
Laevicardium substriatum . 1655 509 255 ..... 127
Mactra sp. . 255 . . ..... 255
Tellina sp. . 1273 382 382 255 .....
Tellina sp. B (SCAMIT) . . 127 127 127 127 ....
Tagelus subteres .... ......
Tagelus affinis .... ..... 382
Cooperella subdiaphana .... ..... 127
Cryptomya californica .... . 255 ....
Araneida adult .... ......
Tanystylum cf. intermedium .... 127 .....
Calanoida (copepod) 127 ... ......
Oxyurostylis sp. 255 ... ......
Paracerceis sculpta . 127 . . ......
Ampithoe spp. . 127 . . ......
Ericthonius brasiliensis . 127 . . . 382 ....
Grandidierella japonica .... 127 509 ....
Pontogeneia rostrata .... ......
Tethygenia opata . . . . .127
Gammaropsis thompsoni 127
Mayerella banksia . . 127 . ......
Caprella mendax .... ......
Caridea 127 ... ......
Neotrypaea californiensis 127 . 127 . . 127 . .
Pinnixa spp. .... ......
Heleidae pupa .... ......
Ephydridae pupa .... ......
Phoronida 255 127 .... 127
Lichenopora sp. (colonial) .... ......
Membranipora sp. (colonial) . 127 . . ......
Ophiuroidea . . . 255 .......
Ophiuroidea .... ... 127
Leptosynapta sp. .... ......
TOTAL 2037 18462 3947 2674 11205 15406 2037 509 891 7639
Number of species 9 25 10 11 12 16 4 4 2 17
1 I \ I 1 I ! I I I ! I 1 I 1 I l
Species
Bar
11
, , , , f f , , ,
Agua Hedionda Lagoon Benthic Infauna Data
Density per m2
West Inner Lagoon
Bar Eelgrass Bed ------ Non-Vegetated
12 13 14 15 16 17 18
Actiniaria .....
Nemertea . 127 ...
Lineidae .....
Paranemertes californica 255 ....
Nematoda . 2037 ...
Polychaeta .....
Polynoidae .....
Tenonia priops .....
Chloeia pinnata .....
Phyllodoce longipes . . . 127 .
Eteone spi lotus .....
Eumida sp . 2 . .127
Platynereis bicanaliculata . . 127 127 .
Nephtys cornata franciscana .... 127
Nephtys caecoides .....
Hemipodus borealis 127 ....
Goniada littorea .....
Lumbrineris spp. . 127 . . .
Lumbrineris minima .....
Schistomeringos rudolphi .....
Scoloplos acmeceps .....
Leitoscoloplos pugettensis . . 127 . 891
Acmira catherinae . 127 ...
Polydora spp. . . . 127 .
Polydora ligni . . 2037 2165 .
Polydora nuchal is .....
Prionospio heterobranchia .....
Apoprionospio pygmaea .....
Spiophanes missionensis . 382 ...
Rhyncospio glutea .... 127
Pseudopolydora paucibranchiata 127 . 255 255 .
Carazziella sp. .....
Boccardiella sp. . . 127 382 .
Boccardiella hamata . . 255 127 .
Diplocirrus sp. .... 509
Armandia brevis . 127 255 . 127
Polyophthalmus pictus .....
Capitellidae .....
Capitella "capitata" . . 637 . 637
Notomastus lineatus .....
Notomastus hemipodus 891 382 127 . 127
Mediomastus sp. . 255 . . 382
Mediomastus ambiseta .....
Mediomastus californiensis . 127 ...
Anotomastus gordiodes .....
Pista sp. .....
Pista alata .... 127
Euchone limnicola .... 255
Oligochaeta 5093 4711 1528 1273 637
Caecum californicum .....
Alia carinata .....
Granulina margaritula . . 127 ..
Acteocina inculta .....
127
127
509
382
127
1019
.
.
.
.
255
.
127
.
.
.
.
127
127
127
891
382
127
255
127
255
1 I • I I 1 I i I I I 1 I 1 I ! I I 1 I 1 1 II I i II II
Species
Bar
11
Agua Hedionda Lagoon Benthic Infauna Data
Density per m2
West Inner Lagoon
Bar Eelgrass Bed ------ Non-Vegetated
12 13 14 15 16 17 18
Philine sp. A
Haminaea vesicula
Bivalvia
Mytilus galloprovincialis
Musculista senhousi
Laevicardium substriatum
Mactra sp.
Tellina sp.
Tellina sp. B (SCAMIT)
Tagelus subteres
Tagelus affinis
Cooperella subdiaphana
Cryptomya californica
Araneida adult
Tanystylum cf . intermedium
Calanoida (copepod)
Oxyurostylis sp.
Paracerceis sculpta
Ampithoe spp.
Ericthonius brasiliensis
Grandidierella japonica
Pontogeneia rostrata
Tethygenia opata
Gammaropsis thompsoni
Mayerella banksia
Caprella mendax
Caridea
Neotrypaea californiensis
Pinnixa spp.
Heleidae pupa
Ephydridae pupa
Phoronida
Lichenopora sp. (colonial)
Membranipora sp. (colonial)
Ophiuroidea
Ophiuroidea
Leptosynapta sp.
TOTAL
Number of species
127
127
127
127
127
382
127
127
127
127
.
127
127
255
127
127
255
509
127
637
5602
764
127
509
5220 127
127
127
7130
8
9549
14
13242
18
127
10823
12
127
127
4838
16
1401
5
127
2037
8
764
127
3056
10
• • mm K i *i K i K i • i & i ii ri 11 11 • i i i 11 i i 11 i i i i
Agua Hedionda Lagoon Benthic Infauna Data
Density per m2
East Inner Lagoon
Eelgrass Bed Non-Vegetated Bar Bar Bar Bar
Species 19 20 21 22 23 24 25 26
Actiniaria ........
Nemertea ........
Lineidae ........
Paranemertes californica ........
Nematoda 127 .......
Polychaeta ........
Polynoidae ........
Tenonia priops ........
Chloeia pinnata ........
Phyllodoce longipes ........
Eteone spilotus ..... 127
Eumida sp. 2 ........
Platynereis bicanaliculata ........
Nephtys cornata franciscana ........
Nephtys caecoides ........
Hemipodus borealis ........
Goniada littorea ........
Lumbrineris spp. . . 127 .....
Lumbrineris minima . . . 127 ....
Schistomeringos rudolphi 127 . . 382 ....
Scoloplos acmeceps ........
Leitoscoloplos pugettensis . . 255 .....
Acmira catherinae ........
Polydora spp. ........
Polydora ligni 2801 127 509 509 637 127
Polydora nuchalis ..... 1401 . 127
Prionospio heterobranchia . 127 255 .....
Apoprionospio pygmaea . .
Spiophanes missionensis . 127 127 .....
Rhyncospio glutea ........
Pseudopolydora paucibranchiata ........
Carazziella sp. ........
Boccardiella sp. . . . 127 ....
Boccardiella hamata ........
Diplocirrus sp. ........
Armandia brevis . . 127 . . . .
Polyophthalmus pictus ........
Capitellidae ........
Capitella "capitata" . 255 127 891 891 1655
Notomastus lineatus ........
Notomastus hemipodus ........
Mediomastus sp. ........
Mediomastus ambiseta ........
Mediomastus californiensis ........
Anotomastus gordiodes ........
Pista sp. ........
Pista alata ........
Euchone limnicola . . 127 .....
Oligochaeta ........
Caecum californicum ........
Alia carinata ........
Granulina margaritula ........
Acteocina inculta . 127 637 3183 127 127
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Species
Agua Hedionda Lagoon Benthic Infauna Data
Density per m2
East Inner Lagoon
Eelgrass Bed Non-Vegetated Bar Bar Bar
19 20 21 22 23 24 25
Bar
26
Philine sp. A
Haminaea vesicula
Bivalvia
Mytilus galloprovincialis
Musculista senhousi
Laevicardium substriatum
Mactra sp.
Tellina sp.
Tellina sp. B (SCAMIT)
Tagelus subteres
Tagelus affinis
Cooperella subdiaphana
Cryptomya californica
Araneida adult
Tanystylum cf. intermedium
Calanoida (copepod)
Oxyurostylis sp.
Paracerceis sculpta
Ampithoe spp.
Ericthonius brasiliensis
Grandidierella japonica
Pontogeneia rostrata
Tethygenia opata
Gammaropsis thompsoni
Mayerella banksia
Caprella mendax
Caridea
Neotrypaea californiensis
Pinnixa spp.
Heleidae pupa
Ephydridae pupa
Phoronida
Lichenopora sp. (colonial)
Membranipora sp. (colonial)
Ophiuroidea
Ophiuroidea
Leptosynapta sp.
TOTAL
Number of species
127 255
127
127 255
127
127
1273
127 127
127 127
127
127 127
4584
6
891
6
127
127
3056
14
5220
6
2674
4584
6
3692
7
382 382
2 3
m
m
C.5 Biomass of Taxonomic Groups of Infauna
by Lagoon Section, Station, and Habitat
i ii ii ii it ii ii ii ii ii ii ti ir •• i ii ii ti
Taxonomic Group
Agua Hedionda Lagoon Benthic Infauna Data
Biomass (gm/m2)
Outer Lagoon Middle Lagoon
Eelgrass Bed Non-Vegetated Eelgrass Bed Bar Bar
1234 5678
Non-Vegetated
9 10
Crustaceans
Insects
Mollusks
Minor Phyla
Polychaetes
TOTAL
0.
0.
0.
0.
13.
.255
.000
.127
.127
.751
0.
0.
17.
9.
39.
.382
,000
,189
,167
,343
0
0
6,
0
15.
.127
.000
.366
.127
.152
0.
0.
12.
0.
25.
.000
.000
.096
.764
.083
14.260 66.081 21.772 37.943
0.
0.
23.
7.
8.
39,
,382
,000
.046
,257
,913
,598
76.
0.
0.
0.
16.
93.
,649
.000
,255
,127
,425
.456
0.
0.
0.
0.
1.
1.
,000
,000
000
,127
783
,910
0.
0.
0.
0.
0.
0.
.000
.000
.127
.509
,255
,891
0.
0.
0.
0.
0.
0.
.000
,000
,000
,000
,764
,764
0.
0,
21,
1,
18.
42,
.000
.000
.900
.528
.971
.399
II 1 t 1 K 1 ft • mm 11 ii vi 11 11 ii ii ii 11
Taxonomic Group
Bar
11
Agua Hedionda Lagoon Benthic Infauna Data
Biomass (gm/m2)
West Inner Lagoon
Bar Eelgrass Bed Non-Vegetated
12 13 14 15 16 17 18
Crustaceans
Insects
Mollusks
Minor Phyla
Polychaetes
TOTAL
37.561
0.000
0.127
1.146
36.287
75.121
2.419
0.000
5.984
0.637
11.332
20.372
19.
0,
5,
0.
27.
52
.353
.000
.475
.000
.247
.076
18.
0.
67,
0.
7,
93.
.080
,000
.864
,127
.257
.329
0
0
12
2
26
40
.000
.000
.223
.292
.356
.871
0.000
0.000
0.000
4.329
4.329
8.658
0.
0,
0.
0,
5,
6
,127
.000
.637
.127
.220
.112
0.000
0.000
10.568
3.183
5.220
18.971
§ i ii r i t i vi ti r i ii r i ri t i 11 • i ft i ri r i i i i i i i
Agua Hedionda Lagoon Benthic Infauna Data
Biomass (gm/m2)
East Inner Lagoon
Eelgrass Bed Non-Vegetated Bar Bar Bar Bar
Taxonomic Group 19 20 21 22 23 24 25 26
Crustaceans 1.146 0.127 0.127 0.000 0.127 0.000 0.000 0.000
Insects 0.000 0.000 0.000 0.000 0.000 0.127 0.127 0.127
Mollusks 1.528 1.146 2.801 22.154 5.984 8.021 3.183 0.000
Minor Phyla 0.127 0.127 2.037 0.255 4.456 0.255 0.000 0.000
Polychaetes 2.037 1.146 4.456 8.403 3.438 15.406 0.000 0.127
TOTAL 4.838 2.546 9.422 30.812 14.006 23.810 3.310 0.255