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<br />FY 1997 SCOPE OF WORK <br /> <br />Study to determine habitat use of endangered fishes in the Yampa River during <br />baseflow periods. <br /> <br />Introduction <br /> <br />This study relates to the Green River Action Plan Yampa River elements 1.A.2., <br />I.A.4.a.(3).(a)., and I.B.2. of identifYing baseflow discharge needs of endangered fishes <br />in the Yampa River. The goal will be to determine habitat use patterns of endangered <br />fishes in the Yampa River during the lowest flow period of the year (i.e. August through <br />October). The specific objectives of this study include: <br /> <br />. Monitor movements of Colorado squawfish, northern pike, and channel catfish in the <br />Yampa River during the low flow periods (August through October) to determine the <br />range of movement and habitats occupied during the baseflow periods. <br /> <br />Study Area <br /> <br />The study area includes the Yampa River from its confluence with the Green River to <br />river mile 105, in Colorado. <br /> <br />Study Methods/Approach: Lowflow habitat use by endangered fishes <br /> <br />Movements of Colorado squawfish will be monitored using radio telemetry to determine <br />1) the range of movement during the low flow period, and 2) summer low habitat use, and <br />3) the distance Colorado squawfish move from late summer into winter. Northern pike <br />and channel catfish will also be monitored to determine the range of movement during the <br />baseflow period. Colorado squawfish, northern pike, and channel catfish from above <br />Yampa Canyon that were implanted with 24 month radio transmitters in 1996 will be <br />monitored in 1997. In addition, five more Colorado squawfish above Juniper canyon will <br />be implanted with transmitters by CDOW and USFWS in spring of 1997. Colorado <br />squawfish movement will be monitored following spawning to determine when fish <br />return to the spawning reach. Fish will be located every week to determine the range of <br />movement from summer home range positions. Individual Colorado squawfish that are <br />on areas with landowner access will be monitored every two hours over a 24 hour period <br />once monthly to determine habitats used during low flows and the range of daily <br />movements. The desired number of contacts is ten 24 hour contacts during the low flow <br />period. The final contacts will be determined by field locations and landowner access <br />during the 1997 summer season. <br /> <br />Yampa River Radio Telemetry Report <br />Miller Ecological Consultants, Inc. <br /> <br />Page 50 <br />January 23, 1997 <br />