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<br />\..-R <br /> <br />Response variables to be measured for fishes (both native and nonnative) are as follows: relative <br />abundances (by species), cohort analysis between years, native and nonnative species composition, growth <br />rates, stage-specific abundances and/or other indices <br /> <br />Fish evaluation River Reach <br /> <br />River sampling for fish will be conducted within 6 reaches (7 miles each) between Bonanza Bridge and the <br />Duchesne River confluence (Table 2). <br /> <br />Table 2. Levee Removal river sampling reaches. <br /> <br />Reach <br />number <br /> <br />Sile Code <br /> <br />Start RMI <br /> <br />End RMI <br /> <br />BO I 290.0 283.0 <br />BC 2 283.0 276.0 <br />SR 3 276.0 269.0 <br />AB 4 269.0 262.0 <br />LE and J4 5 262.0 '255.0 <br />CD and CW 6 255.0 248.0 <br /> <br />Fish will be captured using electro fishing gear, seines and fYke nets. Electrofishing will be conducted on a <br />biweekly basis during the time wetlands are connected with the river (May-June). When wetlands <br />disconnect with the river electrofishing will continue on a monthly basis (July-September). During this <br />period (July-September) fYke nets will be set in the main channel and backwaters will be sampled with <br />seines and fYke nets. In addition, 1 preseason sampling trip using all the above methods will be conducted <br />each year in March or early April. <br /> <br />Electrolishing <br /> <br />Electrofishing will be eonducted around the perimeter of wetland sites. The distance of river sampled at <br />eacb. site will be standardized by selecting a landmark just above and below each wetland site during the <br />flTst sampling trip. This distance will be no more than 1.5 miles long. Electrofishing will be conducted <br />traveling downstream and as close to the shoreline as possible. Two passes will be made during each trip. <br />Attempts will be made to catch all fish. Fish not caught will be counted if positive identification can be <br />made. Lengths and weights of all captured fish will be recorded. All fish will be released alive back into <br />the river with the exception offish eviscerated for stomach contents analysis. Stomach samples will be <br />collected for the following species: cha.nnel catfish, black bullhead, bluehead sucker, flannelmouth sucker, <br />smallmouth bass, northern pike and walleye. Endangered species will not be eviscerated. <br /> <br />Fyke netting and seining backwaters <br /> <br />Before backwater sampling begins, a survey detennining the number of qualifYing backwaters within each <br />reach will be conducted. A qualifying backwater for seining will follow the Interagency Standardized <br />Monitoring Program (ISMP) YOY sampling protocol (30 m' area and 0.30 m deep at its deepest point). <br />Because fYke nets require deeper and larger backwaters to function properly, a qualifYing backwater must <br />be at least 0.60 m deep and large enough to submerge all the fyke net funnels. Crews will conduct the <br /> <br />7 <br />