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<br />"} ,. <br /> <br />Research Component - Core-Research <br />Study No. - 1 <br /> <br />No: <br /> <br />(for Me use) <br /> <br />RBCOVBRY DlPLBXB!ITA'1'ION PROGRAM POR '1'BB BJlDANGERBD <br />PISH SPBCIBS IN '1'BB una COLORAllO RIVBa BASIN <br /> <br />"-1993 <br />SCOPB-Op.WOIUt <br />RBSBAlt.CB PR.OiOSAL <br /> <br />Laad Agency: <br /> <br />U.S. Bureau of Reclamation/ <br />Larval Fish Laboratory <br /> <br />Subaitted by: <br /> <br />Kevin R. Bestgen, Robert T. Muth <br /> <br />Category: <br />-X-Ongoing project <br />___Requested new start <br />___unsolicited project <br />___Outside funding <br /> <br />Ac1c1ra.. : <br /> <br />loarval Fish Laboratory (Ln.) <br />Department of Fiehery and <br />Wildlife Biology <br />Colorado State university <br />Fort Collins, CO 805~3 <br /> <br />(303) 491-1848/5~95; FAX 491-5091 <br /> <br />May 1"1 <br /> <br />Phone: <br /> <br />!lata: <br /> <br />I, Title Of P%cposal: <br /> <br />ANHtJAL ASSBSSIIBN'1' 01' COLORADO SQUAWPISH RBPROIlUCTIOII ANI) LARVAL ABtlllDANCB <br />Dr TBIi LOlfBR Y.llXJIA RIVBR, COLORAllO, ANI) TBIi LOlfBR GRKBJI RIVBa, t1TAB. <br /> <br />II. Relation to Recovery ProgTaa/Ranking Factors: <br /> <br />This study _as started in 1990 and is pa.r1: Of the "Five-Year Flaming Gorge <br />FlovRec:cmmendations Investigations (FGPRI) " ; it specifically relates to <br />the reproduction element of the Core-Research studies. Core-Research. <br />which was outlined in detail in the FY-l"~ and 1993 FGpRI proposal, is <br />composed Of four interrelated elements and is intended to directly assess <br />effects Of seasonal operation of Plaming Gorge Dam on annual reproduction <br />and long-te%lll recruiea.nt Of fishes in the Green River system. The fOur <br />elements include 1) reproduction, ~) age-O recruitment (survival Of age-O <br />fish to fall), 3) age-l recruitment (factors affecting distribution and <br />abundance Of age 1 fish, particularly ovezvinter), and 4) adult <br />recruitment (linlt kletween recruitment of young fish and recruitment to <br />adult stoc:lts. ,Integrated studies under FGFRI will facilitate <br />detendnation of factors affecting annual reproduction, abundance, and <br />recruitment of COlorado squawfish (and other fishes) in the Green River <br />basin. <br /> <br />Annual assessment of Colorado squawfish reproduction and larVal abundance <br />(this study) is necessary to identify and assess factors affecting annual <br />recruiea.nt, and is directly linlted with the reproduction element of the <br />Core-Research Studi... Interpretation of resultB of this study will be <br />enhanced by information fran Hypotheses-Testing studies Ii <br />"Availability, habitat characteristics, and fish use of spring habitats <br />for Colorado squawfish and razorback sucker in the Green river) and <br />especially 8 , "Barly BiOlogy Studies"; see specific proposals. <br /> <br />Flaming Gorge Studies <br /> <br />A2 <br />