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

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Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Table 1-11. Summary of fish mass (g) in the Muted Pocket Marsh in 2008. Species January 2008 April 2008 July 2008 October 2008 California Killifish 0.9 28.2 364.5 57.4 Topsmelt 235.1 231.9 1,213.3 2,205.3 Staghorn Sculpin 0.1 46.6 Yellowfin Goby 1.6 Longjaw Mudsucker 46.0 169.2 Cheekspot Goby 3.3 Arrow/Shadow Goby complex 4.4 10.2 1.2 Diamond Turbot 1.3 26.8 Total Mass (g) 237.4 388.8 1,757.2 2,263.9 Area Sampled (m 2 ) 1,301 1,206 938 1,301 The water quality conditions at the time of each sampling in the Muted Pocket Marsh were presented in Table 1-7. In January water temperature was lower than all other sites (7.9°C), then reached a high of 30.9°C in July. This basin can experience wide fluctuations in temperature due to its shallow depth and restricted circulation from Outer Bolsa Bay through the tide gates. The salinity was fairly stable, ranging between 30.9 ppt in January and 36.5 ppt in July. Dissolved oxygen in the MPM ranged from 5.2 mg/L in October to 10.9 mg/L in July. Fish Length Of all 42 fish species captured, all but three were represented to some degree by juveniles. The three species captured only as mature individuals were thornback (Platyrhinoidis triseriata), California needlefish, and jacksmelt. The minimum and maximum standard length of each fish species is presented in Table 1-12. In Figure 1-10, the number of individuals in each standard length size class is presented by quarter, for four species selected based on their numerical dominance, commercial importance, or importance as a food source for birds. Only fish captured in the FTB in 2008 (Stations 1 and 2) are included. As described in the methods section, standard length was not determined for individuals that were batch weighed. Therefore, the size class distributions shown include only individually weighed and measured fish (the first 30 individuals of each species in each replicate) and therefore do not always reflect the total catch of that species overall. Because the subsampling and batch weigh protocol was designed to sample randomly across size classes, it is assumed that these data are generally representative of total catch. Topsmelt were generally smallest in July, with larger individuals present in April and October. July also had the most small slough anchovy, consistent with Emmitt et al. (1991), which reports spawning to occur from May to September, peaking in July. These smaller bait fish may have served as a food source for nesting terns on the nest sites. Nearly all individuals of kelp bass, a recreational important sport fish, were less than one year old based on their length (
Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Table 1-12. Minimum and maximum standard length (mm) of all fish species captured by quarter at all station in 2008. January 2008 April 2008 July 2008 October 2008 Species Min. SL (mm) Max. SL (mm) Min. SL (mm) Max. SL (mm) Min. SL (mm) Max. SL (mm) Min. SL (mm) Max. SL (mm) Gray Smoothound 860 860 375 635 Thornback 450 450 Bat ray (disc length) 170 170 180 250 220 420 Round Stingray 140 230 135 244 145 210 California Butterfly Ray (disc length) 215 515 Bonefish 145 195 Pacific Herring 49 49 Pacific Sardine 46 51 Northern Anchovy 109 109 34 50 Deepbody Anchovy 78 84 22 128 Slough Anchovy 49 80 24 82 California Lizardfish 83 102 California Needlefish 370 370 California Killifish 20 62 20 68 14 84 15 59 California Grunion 25 35 18 124 19 53 36 64 Topsmelt 22 148 14 138 13 132 32 144 Atherinid, unidentified juvenile 10 39 10 14 Jacksmelt 318 318 280 375 Bay Pipefish 90 175 140 230 48 250 110 244 Barred Pipefish 111 111 73 73 Sebastes , unidentified juvenile 35 35 Staghorn Sculpin 13 62 15 86 58 79 Kelp Bass 34 83 86 104 19 145 Spotted Sand Bass 72 105 140 140 Barred Sand Bass 75 140 115 155 Salema 26 39 Queenfish 59 59 24 162 40 40 Striped Mullet 27 27 Yellowfin Croaker 105 235 Black Croaker 17 29 54 54 Walleye Surfperch 47 47 Shiner Surfperch 33 64 66 88 Bay Blenny 36 40 Giant Kelpfish 69 110 103 145 Yellowfin Goby 29 33 Longjaw Mudsucker 145 145 29 115 52 117 Cheekspot Goby 22 35 13 38 20 35 26 40 Arrow/Shadow Goby complex 15 31 15 43 14 52 30 38 Gobiidae, unidentified juvenile 12 13 11 16 California Halibut 107 107 105 455 100 280 85 245 Diamond Turbot 12 220 13 175 34 215 160 220 Speckled Sanddab 78 78 Unidentified Fish 23 28 Merkel & Associates, Inc. 52
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Total Future Full Tidal Basin FFTB
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Western Snowy Plover Nesting at Bol
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2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

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