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

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Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Less common fish captured over the year included bonefish (Albula vulpes), California lizardfish (Synodus lucioceps), and an unidentified juvenile rockfish (Sebastes sp.). All were captured in low numbers. Only one California needlefish (Strongylura exilis) was captured (in April 2008), though a school of them was observed from the boat at Station 1 in October but not captured. No striped mullet (Mugil cephalus) were captured in the basin but were regularly observed, particularly in October, in schools in the shallows along the riprap of the basin. Ca. butterfly ray in the beach seine. The total mass (g) of fish captured in 2008 is presented in Table 1-6. A total of 55 kg of fish was captured at Station 1, 68% of which was made up of elasmobranchs, primarily bat ray (Myliobatis californica), round stingray (Urobatis halleri), gray smoothhound (Mustelus californicus), and California butterfly ray (Gymnura marmorata). Topsmelt, yellowfin croaker (Umbrina roncador), and California halibut were also major contributors to overall mass at Station 1. A smaller total mass of 19 kg of fish was captured at Station 2, dominated by topsmelt (45%), jacksmelt (17%), and diamond turbot (12%). It is important to note when reviewing these tables that survey intensity varied slightly between stations due to variations in large beach seine haul sizes, so direct comparisons between stations and quarters should be made carefully. In addition, the sampling biases between gear types make lumping of the catch of all gears together inappropriate. To standardize for the area sampled and to allow direct comparisons in density and biomass between stations, Figure 1-8 presents the mean density (individuals/m 2 ) by gear by quarter for each station. The results of the first sampling in October 2007 are included as well. Merkel & Associates, Inc. 43
Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Table 1-6. Summary of fish mass (g) in the Full Tidal Basin in 2008. Grand Total Station 1 Grand Total Station 2 January 2008 2008 Station 1 (North) Station 2 (South) April 2008 Station 1 (North) Station 2 (South) July 2008 Station 1 (North) Station 2 (South) October 2008 Station 1 (North) Station 2 (South) 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 6,605.0 0.0 3,000.0 3,387.0 218.0 Thornback 895.0 0.0 895.0 Bat Ray 13,716.0 248.0 248.0 250.0 1,350.0 ###### Round Stingray 8,902.0 566.0 1,128.0 159.0 566.0 4,675.0 1,315.0 922.0 703.0 California Butterfly Ray 7,556.0 0.0 6,800.0 756.0 Bonefish 308.0 0.0 308.0 Pacific Herring 0.0 6.1 6.1 Pacific Sardine 0.0 3.0 3.0 Northern Anchovy 21.2 2.5 10.0 11.2 2.5 Deepbody Anchovy 1,072.0 212.4 25.0 59.0 988.0 212.4 Slough Anchovy 353.6 51.2 130.0 151.2 72.4 51.2 California Lizardfish 8.0 29.0 8.0 20.0 9.0 California Needlefish 55.0 0.0 55.0 California Killifish 2,014.6 76.5 0.1 43.7 15.7 17.7 15.2 10.7 1,983.6 4.4 California Grunion 692.1 471.7 0.5 1.5 18.1 664.0 6.0 165.3 9.1 296.4 0.4 2.5 Topsmelt 4,495.7 8,573.7 0.2 718.9 50.2 358.9 2,325.0 2,542.2 458.0 126.2 29.0 1,050.6 1,990.5 937.5 918.4 1,563.8 Atherinid, unidentified juvenile 16.5 32.6 4.9 11.6 3.5 29.1 Jacksmelt 340.0 3,169.0 340.0 3,169.0 Bay Pipefish 0.7 86.8 0.7 3.3 2.4 5.0 5.0 25.6 2.6 11.2 31.7 Barred Pipefish 0.0 0.7 0.7 Sebastes , unidentified juvenile 0.0 1.4 1.4 Staghorn Sculpin 27.3 188.4 5.0 49.1 9.3 47.9 13.0 91.4 Kelp Bass 54.7 154.3 9.7 40.0 5.0 0.8 13.0 31.0 106.7 2.8 Spotted Sand Bass 0.0 209.7 39.7 31.0 22.0 66.0 51.0 Barred Sand Bass 817.0 302.0 315.0 214.0 288.0 41.0 180.0 81.0 Salema 0.0 6.3 6.3 Queenfish 10.4 82.0 4.0 9.3 4.0 74.0 1.1 Yellowfin Croaker 3,078.0 0.0 3,078.0 Black Croaker 0.5 7.1 0.5 2.7 4.4 Walleye Surfperch 0.0 2.2 2.2 Shiner Surfperch 0.0 237.5 73.3 10.4 85.6 68.2 Bay Blenny 1.5 1.8 1.5 1.8 Giant Kelpfish 0.0 82.9 15.5 67.4 Cheekspot Goby 4.5 0.8 0.5 0.3 0.3 0.5 3.7 Arrow/Shadow Goby complex 46.9 66.5 0.4 1.3 7.9 0.3 38.3 64.9 0.3 Gobiidae, unidentified juvenile 0.4 0.1 0.1 0.1 0.3 California Halibut 2,431.0 1,909.0 23.0 1,949.0 1,095.0 94.0 209.0 285.0 19.0 179.0 232.0 255.0 Diamond Turbot 1,911.7 2,271.4 12.5 422.0 238.9 140.0 13.1 309.0 146.5 260.0 61.1 715.0 17.0 1,347.0 379.0 122.0 Speckled Sanddab 0.0 10.0 10.0 Unidentified Fish 0.0 0.3 0.3 Total Mass (g) 55,435 19,063 25 422 731 365 388 79 3,685 3,426 5,071 2,774 1,956 637 15,739 3,209 18,944 1,409 1,704 5,975 2,921 1,261 2 934 885 1,956 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. 44
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2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

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