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<br />COLORADO RIVER RECOVERY PROGRAM <br />FY 98 ANNUAL PROJECT REPORT <br /> <br />RECOVERY PROGRAM <br />PROJECT NUMBER: ~ <br /> <br />I. Project Title: Bonytail Reintroduction <br /> <br />II.-PriilCipaIlrivestigators: .. <br />Leo Lentsch <br />Utah Division of Wildlife Resources <br />1594 West North Temple <br />Suite 2110, Box 146301 <br />Salt Lake City, UI 84114-6301 <br />801-538-4756 fax: 801-538-4745 <br />email: nrdwr.llentsch@state.ut.us <br /> <br />Tom Chart <br />Utah Division of Wildlife Resources <br />Moab Field Station <br />1165 S. Highway 191 - Suite 4 <br />Moab, UT 84532 <br />435-259-3781 fax: 435-259-3755 <br />email: nrdwr.tchart@state.ut.us <br /> <br />III. Project Summary: <br /> <br />Bonytail (Gila elegans) is currently thought to have been functionally extirpated <br />from the Upper Colorado River Basin. The Bonytail Reintroduction Plan for the <br />Upper Colorado River Basin was completed in March of 1996 (Lentsch 1996) <br />and serves as a template for these recovery efforts. Our working hypotheses for <br />bonytail reintroduction are: <br />a) bonytail can be successfully reintroduced into the Upper Basin, <br />b) the size ofbonytail will affect their survival in the river, <br />c) bonytail will move downstream following stocking, and <br />d) habitat overlap will be minimal between bonytail and roundtail chub. <br /> <br />The overall goal of this study is to reestablish bonytail in the upper Colorado <br />River Basin. The following project objectives were identified to detennine <br />progress towards that goal: <br />1. Reintroduce bonytail: raise bonytail to a target size in captivity and <br />then stock in the Colorado River, Professor Valley and the Green <br />River, near the town of Green River, UI. <br />2. Detennine the appropriate nwnber and size ofbonytail to stock to <br />maximize survival. This objective will be completed by monitoring <br />the stocked fish. <br /> <br />25-1 <br />