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<br />identified and management for young fish attempted in downstream <br />nursery areas. <br /> <br />1993 BudQet <br /> <br />-Labor <br />-Equipment <br /> <br />FWS <br />$19,000 <br />1,000 <br /> <br />LFL <br />$5,000 <br /> <br />-Total <br /> <br />$25.000 <br /> <br />Study #4. Evaluation of Colorado sQuawfish recruitment and behavior usinQ <br />mark and recaoture techniques. <br /> <br />Descriotion of work <br />Study No.4 is an ongoing Core-Research study being conducted by the <br />FWS. The primary goal of the study is to determine the relationship <br />between relative abundance of young Colorado squawfish and seasonal <br />changes and river conditions, including variable flow releases from <br />FGD. Specific objectives of the study include, 1)determining <br />behavioral patterns that influence sampling bias, 2)data gaps, and <br />3)future research needs. The study is closely related to Study No. <br />5 (Overwinter Survival) and results of each study will be <br />integrated. <br /> <br />This study was initiated in 1991 when a pilot study was undertaken <br />to evaluate the feas i bil i ty of marki ng young Colorado squawfi sh. <br />The intent of the pilot study was to determine if young fish could <br />be successfully marked and subsequently tracked to determine <br />behavioral patterns. Attempts to mark fish were unsuccessful in <br />1991. The focus of the study in 1992 will be to further explore <br />innovative marking techniques and explore alternatives for <br />determining behavioral patterns of young fish and their habitat use. <br />During FY 1993 a final report summarizing the literature on marking <br />techniques and the results of the pilot field tests will be <br />completed. <br /> <br />Methods <br />A comprehensive review of conventional and unconventional marking <br />and unconventional marking techniques will be conducted. Upon <br />completion of the review one or more techniques will be chosen for <br />laboratory and field test of their effectiveness. A trial field <br />test using the most promising techniques will be conducted by <br />setting up a mark and recapture experiment in backwaters on the <br />Green River . <br /> <br />Rationale <br />The study wi 11 1 ay the groundwork for future mark and recapture <br />experiments. These types of experiments are necessary to clarify <br />how sampling bias and behavioral pattern have affected results of <br />past monitoring studies and the impact of spring runoff patterns on <br />survival of young Colorado squawfish <br /> <br />Flaming Gorge Studies <br /> <br />23 <br />