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<br />( <br /> <br />o <br />o <br />c""';l <br />v) <br />CJ:) <br />o <br /> <br />affect recovery of endangered fish in the San Juan <br />River. <br /> <br />Recommend additional research that is needed to <br />identify water quality impacts on endangered fish <br />in the San Juan River. <br /> <br />Research Need: The Department of Interior (DOI) Water Quality <br />Program is finding potentially significant water <br />quality problems from numerous trace element <br />sources and hydrocarbons in the San Juan River <br />basin. The potential impact of water quality on <br />recovery of endangered fish in the San Juan needs <br />to be characterized. <br /> <br />Methods: <br /> <br />The DOI has at least four major water quality <br />programs ongoing in the San Juan River drainage. <br />In addition, the u.S. Geologic Survey and the u.S. <br />Environmental Protection Agency are conducting <br />studies in the basin. Water quality data from all <br />available sources will be collected and compiled so <br />that an assessment of its impact on recovery of <br />endangered fish can be made. This review of the <br />available information will be used to identify <br />crucial water quality issues affecting San Juan <br />River fisheries and to make recommendations <br />concerning future research needs. Recommended <br />water quality studies will be integrated into the <br />seven year research plan. <br /> <br />( <br /> <br />CATEGORY - NON-NATIVE FISH <br /> <br />Status: <br /> <br />Proposed Core Research Program <br />U. S. Fish and Wildlife Service - Region 2 <br /> <br />Lead Agency: <br />Task: <br /> <br />Determine the impacts of predation by nonnative <br />predators and commonality in resource use between <br />native and nonnative fish species under differing <br />flow scenarios. <br /> <br />Timeline: <br /> <br />Phase II (FY 1992-1994) <br /> <br />Objectives: <br /> <br />In conjunction with the adu~t monitoring/research <br />element determine distribution, abundance and <br />movement of channel catfish <br /> <br />Determine food habits of potential <br />predators (i.e. channel catfish) in <br />rearing areas and habitats. <br /> <br />squawfish <br />suspected <br /> <br />l. <br /> <br />18 <br />