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<br />If\ <br />'"l\.:~'1 <br /> <br />V. Study Methods/Approach: <br /> <br />This project was initiated in FY91 as part of the Flaming Gorge <br />Studies. However, funding levels were reduced and the amount of effort was <br />decreased about 25~. The effort in FY92 has been increased to make up this <br />shortfall. <br /> <br />Channel catfish and carp are common species in North America, but <br />their relationships with the endangered Colorado River fishes is poorly known. <br />Channel catfish overwinter in mainstream habitats in other river systems, and <br />they move into tributary streams in the spring to spawn (Oames et al. 1989: <br />Gerhardt 1989: Newcomb 1989). Field observations made in Yampa Canyon in late <br />summer and autumn suggested that the stocks of channel catfish and carp were low <br />relative to spring, and we presume that they move out of the relatively shallow <br />Yampa Canyon at this time and overwinter in m.arby deeper Green River habitats. <br />We would capture channel catfish in various locations in the Monument and implant <br />them with radio transmitters in the spring and early summer. These fish will be <br />tracked to determine if they move into the mainstream Green River as water levels <br />decline. The fish would be tracked as long as possible into the winter to <br />determine habitat use. <br /> <br />Channel catfish and carp are abundant in the Monument portion of the <br />upper Green River, and they are collected sympatrically with spawning razorback <br />suckers. Both species would be captured in locations in which razorback suckers <br />are spawning, and stomachs inspected for the presence of sucker eggs. <br /> <br />VI. Task Description (FY 1992l: <br /> <br />1. Radiotag catfish and carp <br />2. Track implanted fish <br />3. Determine habitat use, evaluate control measures <br />4. Assess foods consumed by both species in razorback spawning areas <br /> <br />VII. Study Schedule: <br /> <br />Continue tracking fish implanted in FY 91: October- <br />SUIIlIII&rize and evaluate FY 91 data: Dec-May 1992. <br />Radiotag additional fish June 1992. <br />Radiotrack fish: July-October <br /> <br />VIII. FY-92 Work <br />Description of work: Radiotracking, evaluate data <br />Deliverables <br />Budget <br />Labor (le12,5e9,2@4) $18,900 <br />Travel 2,800 <br />_ Equipment 300 <br />Other <br />Total $22,000 <br /> <br />FY-93 Work <br />Brief Description: Analyze data, prepare report <br />_ Deliverables: Report of findings <br />- Budget estimate: $4,000 <br /> <br />IX. Budget Summary <br />FY-1992 $22,000 <br />FY-1993 $ 4,000 <br />Total $26,000 <br /> <br />Cl7 <br />