appendix b final 2008 biological surveys of los angeles and long ...

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3.0 Adult and Juvenile Fishes gobies (unspecified) and diamond turbot. These three taxa comprised 99% of the total catch. Abundances at the two beach seine locations were variable over all sampling quarters. Mean total abundance by station is presented in Table 3.5-2. Pier 300 had the highest annual mean abundance (579), while an annual average of 67 fish per haul was collected at Cabrillo Beach (Table 3.5-2). Mean abundances were highest in April for Pier 300 (949), while Cabrillo Beach had the lowest total mean catch (8) during the same quarter. Summer (July) mean abundances followed the same trend, with higher numbers collected at Pier 300 (774) compared to Cabrillo Beach (24). 3.5.1.2 Biomass As with abundance, biomass values were variable over all three sampling events. Mean biomass was lowest during April at Cabrillo Beach (0.001 kg) and highest in January (0.70 kg) at the same station (Table 3.5-2). The highest biomass occurred in April at Pier 300. No significant difference was found in mean total biomass between stations over all sampling quarters combined, due to the very high variability between sampling events. 3.5.1.3 Number of Species A total of seven species and unidentified individuals from one family (Gobiidae; gobies) were collected at all beach seine locations. While three species were collected at Cabrillo Beach, three species and the gobies group were collected at Pier 300 (Table 3.5-1). The greatest number of species (4) was collected at Cabrillo Beach during January sampling and at Pier 300 during July sampling, while only one species was collected at Cabrillo Beach during April (Table 3.5-2). No significant differences were found for the mean number of species between stations. 3.5.1.4 Diversity and Dominance Community measures for the beach seines are presented in Table 3.5-2. The annual mean Shannon-Weiner diversity index was higher at Pier 300 (0.45) than at Cabrillo Beach (0.11). Shannon-Weiner diversity values at both stations were variable across the sampling periods. For Margalef values, the lowest annual mean occurred at Cabrillo Beach and the highest value at Pier 300. A dominance value of 1 was calculated at Cabrillo Beach during all sampling periods. Dominance values at Pier 300 were 1 in April and 2 in the other seasons. 3.5.2 Dominant and Selected Species Of the 7 species collected at both beach seine stations during all sampling quarters, one species (topsmelt) and one species group (gobies) comprised 99% of the total catch, with topsmelt as the most abundant species collected at both stations (Table 3.5-1). Topsmelt sizes ranged between 2 and 13 cm at Cabrillo between 1 and 7 cm at Pier 300 (Figure 3.5-1), indicating that most topsmelt collected during beach seine surveys were juveniles. The taxonomic group “gobies” was likely comprised of two species, arrow goby and shadow goby, and ranged in size between 2 and 4 cm. Diamond turbot were only collected at Pier 300 and were in the 1 to 6 cm size classes. No commercially and/or recreationally important species were collected at either beach seine location. 3.5.3 Summary of Spatial and Temporal Variations Spatial and temporal trends were less distinct for the beach seine locations compared to the lampara and trawl stations, due mainly to the low species numbers, abundances, and biomass. Seasonal patterns in abundance were variable, with average total abundances being highest in 2008 Biological Surveys of Los Angeles and Long Beach Harbors 3–13 April 2010
3.0 Adult and Juvenile Fishes April at Pier 300 and highest in January at Cabrillo. Abundances were lowest in spring (April) at Cabrillo and lowest in winter (January) at Pier 300 (Table 3.5-2). The same temporal patterns were observed for biomass. In addition, no distinct pattern in the number of species was evident, although the number of species increased slightly at Pier 300 from a low in winter of 2 to a high in summer of 4. The number of species collected at Cabrillo was highest in January (4). The main difference between the two locations was larger catches of topsmelt at Pier 300. Because eelgrass occurs at both beach seine locations, the variability in topsmelt catch most likely reflects natural variability rather than a habitat-associated difference between locations. 3.5.4 Historical Comparisons Characterization of shallow-water fishes in the harbors using beach seines has occurred infrequently since the 1980s (MEC 2002). Generally, fish abundances (pelagic and demersal species) have been spatially and temporally variable, sometimes due primarily to differences in sampling methodologies. However, general patterns in fish species composition collected in otter trawl and lampara (or gill net) surveys have been relatively stable, with the same dominant species being collected throughout the harbors. Beach seine collections have tended to be variable in abundance, biomass, and species composition. However, few studies have consistently sampled the same locations over time. For example, 9 species were caught at the Seaplane Anchorage during beach seine sampling, queenfish and California grunion being the most abundant (Horn and Hagner 1982). In 1999, MEC sampled a beach near the Seaplane Anchorage and collected gobies, topsmelt, California halibut, diamond turbot, and pipefish (MEC 2002). Allen et al. (1983) reported a total of 37 fish species collected over a 12-month period at Cabrillo Beach, with northern anchovy comprising 73% of the catch. MBC (1999) sampled fish at two stations at the Southwest Slip in inner Los Angeles harbor and collected topsmelt, slough anchovy, deepbody anchovy, and the yellowfin goby. The previous baseline survey (MEC 2002) collected a total of 20 fish species at the same two beach seine locations as sampled during the current study. The current study collected similar species to most of the previous studies, with a total of 7 species collected at both beach seine stations during all sampling quarters. Although this number is relatively low compared to other historical studies, sampling gear and station differences likely account for the differences in the number of species. 3.6 NONINDIGENOUS SPECIES The only non-indigenous or exotic species collected in the 2008 sampling surveys was the yellowfin goby (Acanthogobius flavimanus). This species is native to Japan, Korea, and northern China (Miller and Lea 1972, Eschmeyer et al. 1983) and was accidentally introduced into the Sacramento-San Joaquin estuary in the 1950s, through ship ballast systems (Brittan et al. 1963). A second population has been reported in Los Angeles, Long Beach Harbor, and Newport Bay (Haaker 1979), and was likely established in the same manner as described above. A total of 53 yellowfin goby were collected in otter trawls at a total of 10 locations (5 in POLA and 5 in POLB) during the current study. This species is also commonly collected in many of the southern California bays and lagoons (MEC 1993, MEC 1999, Merkel and Associates 2001). The previous baseline survey (MEC 2002) collected 19 individuals in beach seine sampling at the Pier 300 site. 3–14 2008 Biological Surveys of Los Angeles and Long Beach Harbors April 2010
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APPENDIX B FINAL 2008 BIOLOGICAL SU
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FINAL 2008 BIOLOGICAL SURVEYS OF LO
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Table of Contents 3.4.3 Summary of
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Table of Contents 8.2.1 Aerial Phot
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Table of Contents Table 3.4-2. Tabl
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Page 19 and 20: Executive Summary otter trawls to s
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Page 26 and 27: 1.0 Introduction 1.0 INTRODUCTION T
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5.0 Benthic and Epibenthic Inverteb
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CHAPTER 6 RIPRAP BIOTA
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6.0 Riprap Biota diver collection m
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6.0 Riprap Biota relatively small b
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6.0 Riprap Biota sea cucumber (Para
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6.0 Riprap Biota polychaete worms.
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6.0 Riprap Biota Table 6.3-1. Mean
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6.0 Riprap Biota Figure 6.2-1. Ripr
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7.0 Kelp and Macroalgae 7.0 KELP AN
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7.0 Kelp and Macroalgae the laborat
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7.0 Kelp and Macroalgae sediment us
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7.0 Kelp and Macroalgae Overall, ou
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7.0 Kelp and Macroalgae pose a sign
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7.0 Kelp and Macroalgae Figure 7.2-
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CHAPTER 8 EELGRASS
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8.0 Eelgrass distribution of eelgra
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8.0 Eelgrass adjacent to most trans
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8.0 Eelgrass load on the plants was
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8.0 Eelgrass (Table 8.3-5), based o
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8.0 Eelgrass surveys. No eelgrass b
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8.0 Eelgrass Areas containing eelgr
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8.0 Eelgrass Seasonal patterns amon
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8.0 Eelgrass 2002) inferred that th
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8.0 Eelgrass Table 8.3-2. Spring 20
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8.0 Eelgrass Table 8.3-4. Fall 2008
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8.0 Eelgrass Table 8.3-12. Oceanic
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8.0 Eelgrass Figure 8.3-2. Eelgrass
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8.0 Eelgrass Figure 8.3-6. Spatial
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9.0 Birds 9.0 BIRDS 9.1 INTRODUCTIO
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9.0 Birds changes in species number
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9.0 Birds the Brown Pelican populat
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9.0 Birds 9.4.2.10 9.4.2.11 9.4.2.1
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9.0 Birds 9.5.1 Distribution and Ab
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9.0 Birds discussed in Section 9.4.
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9.0 Birds Angeles Harbor. The relat
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9.0 Birds Table 9.4-1. Percent Comp
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9.0 Birds Table 9.4-3. Nest Numbers
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9.0 Birds Table 9.5-2. Species Comp
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9.0 Birds Table 9.5-4. Percent Comp
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9.0 Birds Table 9.6-1. Historical C
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9.0 Birds 70 12000 60 10000 50 40 3
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9.0 Birds 3500 shallow water sandy
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9.0 Birds 40 35 30 riprap aerial Nu
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9.0 Birds Number Observed 3500 3000
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9.0 Birds Figure 9.5-1. Total numbe
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9.0 Birds Number of Individuals 400
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9.0 Birds 7000 Mean Number of Indiv
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CHAPTER 10 MARINE MAMMALS
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10.0 Marine Mammals Gray whales dif
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10.0 Marine Mammals This page inten
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11.0 References 11.0 REFERENCES Abb
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11.0 References Dennison, W.C. and
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11.0 References Jacques, D.L., C.S.
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11.0 References North, W.J. 1983. S
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APPENDIX A STATION LOCATIONS
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Appendix A Station Coordinates (NAD
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Appendix B (A) Temperature (°C), S
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APPENDIX C FISHES
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Appendix C Table C-1. Combined Fish
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Appendix C LA01 LA02 LA03 LA04 LA05
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Appendix C Table C-3. Otter Trawl C
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Appendix C Table C-5. Otter Trawl B
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Appendix C Table C-7. Otter Trawl B
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Appendix C Table C-8. Lampara Catch
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Appendix C Table C-10. Lampara Catc
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Appendix C Scientific Name Table C-
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Appendix C Table C-14. Beach Seine
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Appendix D Table D-1. Ichthyoplankt
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Appendix D fish eggs (undeveloped)
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Appendix D fish eggs unid. unidenti
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fish eggs unid. unidentified fish e
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Appendix D Eggs Oligocottus / Clino
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Appendix D Eggs Rhinogobiops nichol
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Appendix D Juvenile Eggs Heterostic
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Appendix D Eggs Liparis spp. snailf
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Appendix D Juvenile Eggs Heterostic
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Appendix D Table D-11. Ichthyoplank
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APPENDIX E INFAUNA
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Appendix E Taxon LA-1 LA-10 LA-11 L
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Appendix E Protothaca laciniata Tax
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Appendix E Taxon LA1 LA2 LA3 LA4 LA
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Appendix E Table E-4. Otter Trawl,
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Appendix E Taxon LA1 LA2 LA3 LA4 LA
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Appendix E Octopus sp. 1 Philine sp
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Appendix E This page intentionally
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Appendix F Table F-1. Total Abundan
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Appendix F LARR-1 LARR-2 LARR-3 LAR
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APPENDIX G KELP AND MACROALGAE
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Appendix G Date Survey Site Observe
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Appendix G Species T1 T2 T3 T4 T5 T
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Appendix H APPENDIX H-1 AVIAN ECOLO
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Appendix H Table H-1. Avian Ecologi
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Appendix H GUILD 8 - UPLAND BIRDS G
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Appendix H APPENDIX H-2 NUMBER OF I
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Appendix H Table H-2. December A 20
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Appendix H Table H-3. December B 20
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Appendix H Table H-4. January A 200
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Appendix H Table H-5. January B 200
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Appendix H Table H-6. February A 20
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Appendix H Table H-7. February B 20
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Appendix H Table H-8. March A 2008
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Appendix H Table H-9. March B 2008
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Appendix H Table H-10. April A 2008
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Appendix H Table H-11. May A 2008 S
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Appendix H Table H-13. July A 2008
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Appendix H Table H-15. August B 200
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Appendix H Table H-16. September A
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Appendix H Table H-17. September B
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Appendix H Species Totals Zones 1 2
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Appendix H Species Totals Zones 1 2
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Appendix H Zones Species Totals 1 2
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Appendix H Zones Species Totals 1 2
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Appendix H Date ELEGANT TERN — OB
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APPENDIX I MARINE MAMMALS
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Appendix I Common Survey Station/ N
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Appendix I Common Name Survey Type
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Appendix I This page intentionally
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