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<br />( <br /> <br />o <br />o <br />("') <br />.~ <br />....... <br />Q'.) <br /> <br />( <br /> <br />c <br /> <br />Methods: <br />Task 1. Determine the distribution, abundance, and movement <br />patterns of channel catfish and correlate to flow. <br /> <br />A. Methods <br />1. In conjunction with other adult and juvenile fish sampling, <br />collect by electrofishing, seining, and gill and trammel netting. <br /> <br />2. Record length/weight data, tag and release sub-adult and adult <br />catfish, retain representative sample for other studies.' <br />3. Enumerate young of year and juvenile catfish collected by seine <br />from backwater and secondary channel habitats. <br /> <br />B. Schedule, 1992-1996 (three years: high, low, 3000-5000 cfs). <br /> <br />Jan-Feb: <br /> <br />Selective juvenile and adult sampling in <br />accessible habitats <br />Adult sampling by electrofishing/netting <br />YOY and juvenile sampling by seine <br />Adult sampling by electrofishing/netting <br /> <br />May-Jun: <br />Aug-Sep: <br />Sep-Oct: <br /> <br />Task 2. Determine the food habits of channel catfish under differing flow <br />regimes in river reaches containing suspected juvenile squawfish rearing <br />areas and juvenile squawfish collection localities. <br />--r <br /> <br />A. Methods <br />1. During Task 1 sampling, preserve representative/ appropriate <br />catfish samples for food habits analysis <br />2. Analyze stomach contents for food item frequency of occurrence and <br />abundance. <br />3. Analyze stomach contents of museum specimens colle.cted during <br />1987-1990 <br /> <br />B. <br /> <br />Schedule, <br />Jan-Feb: <br />May-Jun: <br />Aug-Sep: <br />Sep-Oct: <br /> <br />" <br /> <br />1992-1996 (three years: high, low, <br /> <br />Sample collection and processing <br />" It II II <br /> <br />and 3000-5000 cfs flows) <br /> <br />" <br /> <br />" <br />" <br /> <br />" <br />" <br /> <br />" <br /> <br />" <br /> <br />Task 3. Characterize fish species composition in backwater and secondary channel' <br />habitats and relate to habitat morphology and physical chemistry. <br /> <br />A. Methods <br />1. Collect fish by seining and electrofishing, record effort, <br />enumerate, and preserve a representative subsample <br />2. Along transects measure depth, substrate, current velocity, and <br />water transparency <br />3. Measure temperature, dissolved oxygen, and conductivity <br /> <br />B. Schedule, 1992-1996 (three years: high, low, 3000-5000 cfs flows) . <br />Jan-Feb: fish sampling and habitat measurements <br />Aug-Oct: II If 11 II II <br /> <br />A27 <br />