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<br />downstream to theYampa River, presumably due to cold watef temperatures. The <br />distribution and abundance of fishes presently inhabiting this reach of the Green River is <br />not well understood. Release of warm surface waters from Flaming Gorge Reservoir <br />has been suggested as a strategy to restore native fishes in the reach. Specific <br />objectives of this study are to: I) determine relationship of flow and annual temperature <br />regimes to the current distribution and abundance of fish species in the subject reach; <br />2) compare these relationships to others in the Colorado River basin for which faunal <br />data alfeady exist; and 3) determine if potential exists to fe~tere water temperatures in <br />this reach so that ,rare fish species may benefit. <br /> <br />Recommendations: A single raft electrofishing trip will be made in spring 1996 to <br />fulfill field wOfk obligations for this contract. A fmal report will be prepared and <br />available at the end of 1996. <br /> <br />41 FGIO: FLOW & ICE EFFECTS ON SQUAWFISH <br /> <br />The purpose of this study is to evaluate the effects of winter ice conditions on habitat <br />and survival of age-O Colorado squawfish (Ptychocheilus lucius) in the Green River. <br />Specific objectives are to: <br /> <br />I. Determine availability of free water, and therefore age-O habitat, in ice-covered and <br />ffazil-filled backwaters; <br /> <br />2. Determine longevity of backwaters exposed to winter flow regulation and ice <br />formation; <br /> <br />3. Determine potential for nursery habitat of Colorado squawfish from Echo Park to <br />Rainbow Park; and <br /> <br />4, Recommend winter flows and spring habitat maintenance flows to protect nursery <br />habitat of age-O Colorado squawfish. <br /> <br />Recommendations: none. <br /> <br />53 FG-I: TECHNICAL INTEGRATION & SYNTHESIS <br /> <br />This project will selVe as the primary means by which the various individual studies <br />conducted under the Flaming Gorge Research Program (Research Program) will be <br />consolidated to produce flow recommendations for the endangered fishes in the Green <br />River. The project employs a three level hierarchical approach to producing a final <br />comprehensive technical report that will include completion of individual project <br />reports, integration of all available information at the species level, and integration of <br />flow needs for the various fish species into a comprehensive flow recommendation for <br />the endangered fish community. <br /> <br />A-9 <br />