2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

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Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report 8%, and staghorn sculpin (Leptocottus armatus) 3%. The juvenile atherinids were not developed enough to definitively identify, but were likely either topsmelt or grunion. These species often occur together during larval and juvenile stages (Ehrlich et al. 1978). The remaining species made up less than 2% of the total catch each at Station 2. At Station 1, 28 species were captured in 2008, with California killifish (Fundulus parvipinis) and topsmelt dominating the catch nearly equally (30% and 29% of the total catch, respectively). Slough anchovy (Anchoa delicatissima) made up 14% of the catch and arrow/shadow gobies made up 5%. All other species were captured in low numbers (Table 1-5). Five species of elasmobranchs were captured in 2008, primarily in April and July and nearly entirely at Station 1. Anchovies were captured primarily at Station 1 and only in April and July, with small numbers of deepbody anchovy (Anchoa compressa) and northern anchovy (Engraulis mordax) captured in the purse seine, and slightly larger numbers of slough anchovy, nearly all of which were captured near to shore in a single replicate of the large beach seine in July. Pacific herring (Clupea pallasii) and Pacific sardine (Sardinops sagax caeruleus) were captured only in July and in very low numbers. Topsmelt and California grunion were present year round at both stations, primarily as juveniles. Ten large jacksmelt (Atherinopsis californiensis) were captured, with no juveniles detected. All three Paralabrax bass were captured, with the highest numbers in July and October. All were juveniles. Gobies were common at both stations and were most abundant in July. The density of gobies is believed to be underrepresented because large numbers were often observed swimming out of the seine bag as it was pulled up onto shore. Their slippery texture, active nature, and narrow bodies allow them to align with the net mesh and escape more easily than the other species. Both arrow and shadow gobies were captured in FTB. California halibut (Paralichthys californicus) and diamond turbot (Pleuronichthys guttulatus) were captured in all quarters. Table 1-5 also notes the capture of two unidentified fish. Juvenile California halibut. These two juvenile fish of the same species could not be identified in the laboratory and are being sent out to a taxonomist at the time of this report preparation. The final identification will be included in the next monitoring report. Merkel & Associates, Inc. 41
Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Table 1-5. Summary of fish abundance (# of individuals) in the Full Tidal Basin in 2008. Grand Total Station 1 January 2008 April 2008 July 2008 October 2008 2008 Station 1 (North) Station 2 (South) Station 1 (North) Station 2 (South) Station 1 (North) Station 2 (South) Station 1 (North) Station 2 (South) Grand Total Station 2 Beach Otter Purse Beach Otter Purse Beach Otter Purse Beach Otter Purse Beach Otter Purse Beach Otter Purse Beach Otter Purse Beach Otter Purse Species Seine Trawl Seine Seine Trawl Seine Seine Trawl Seine Seine Trawl Seine Seine Trawl Seine Seine Trawl Seine Seine Trawl Seine Seine Trawl Seine Gray Smoothound 7 0 1 5 1 Thornback 1 0 1 Bat Ray 9 1 1 1 1 7 Round Stingray 29 1 6 1 1 13 5 2 2 California Butterfly Ray 3 0 2 1 Bonefish 4 0 4 Pacific Herring 0 1 1 Pacific Sardine 0 2 2 Northern Anchovy 16 3 1 15 3 Deepbody Anchovy 58 16 4 3 51 16 Slough Anchovy 478 8 27 434 17 8 California Lizardfish 1 5 1 3 2 California Needlefish 1 0 1 California Killifish 1,039 81 1 25 3 4 43 45 992 7 California Grunion 221 545 2 15 73 138 5 88 7 436 1 1 Topsmelt 1,015 2,583 2 29 23 51 437 275 57 173 30 243 1,119 293 332 534 Atherinid, unidentified juvenile 210 373 58 152 35 338 Jacksmelt 1 9 1 9 Bay Pipefish 1 40 1 5 3 2 2 12 2 3 11 Barred Pipefish 0 1 1 Sebastes , unidentified juvenile 0 1 1 Staghorn Sculpin 45 135 31 82 13 42 1 11 Kelp Bass 7 30 3 3 1 1 1 1 26 1 Spotted Sand Bass 0 7 3 1 1 1 1 Barred Sand Bass 25 6 13 5 7 1 4 1 Salema 0 7 7 Queenfish 2 10 1 1 8 1 1 Yellowfin Croaker 16 0 16 Black Croaker 2 8 2 7 1 Walleye Surfperch 0 1 1 Shiner Surfperch 0 54 24 2 23 5 Bay Blenny 1 2 1 2 Giant Kelpfish 0 7 3 4 Cheekspot Goby 18 3 2 1 2 2 14 Arrow/Shadow Goby complex 189 342 4 11 17 1 167 330 1 Gobiidae, unidentified juvenile 4 1 1 1 3 California Halibut 9 11 1 6 1 1 1 3 1 1 4 1 Diamond Turbot 32 21 9 2 6 1 7 2 3 3 4 7 1 6 1 1 Speckled Sanddab 0 1 1 Unidentified Fish 0 2 2 Total Abundance (individuals) 3,444 4,318 111 2 181 183 2 361 175 17 613 341 11 149 875 19 159 690 13 1,623 1,286 4 2 342 64 539 Area Sampled (m 2 ) 10,617 11,141 729 800 1,040 991 800 1,040 884 800 1,040 969 800 1,040 822 800 1,040 853 800 1,040 822 800 1,040 968 800 1,040 Merkel & Associates, Inc. 42
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Bolsa Chica Lowlands Restoration Mo
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Total Future Full Tidal Basin FFTB
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2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

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