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S <br />Included in this report as Appendix A are capture records of <br />402 endangered fish from 1979 to 1985. A total of 202 Colorado <br /> squawfish was collected on the Yampa River between 1979 and 1985. <br /> These 202 records were analyzed for habitat use patterns for depth, <br /> velocity, substrate, and habitat type. The predominant habitat <br /> used by Colorado squawfish during runoff was backwater and during <br /> baseflow was pool habitat on the Upper Yampa. Within Yampa Canyon <br /> the predominant habitat types used were runs and eddies. <br /> Habitat types were censused at runoff and baseflow on the upper <br /> Yampa River in 1985. The stratum with the highest quality baseflow <br /> habitat (pools and eddies) was Lilly Park to Cross Mountain Canyon <br /> (RMI 52-55). The highest quality runoff habitat (backwaters and <br /> eddies) was found in Juniper Springs (RMI 90-105). River segments <br /> with both good runoff and good baseflow habitats were Juniper <br /> Springs (RMI 88-94), Morgan Gulch to Horse Gulch (RMI 103-107), <br /> Upper Cross Mountain (RMI 60-65), Lilly Park to Cross Mountain (RMI <br />i 52-55), and Sunbeam to Maybell (RMI 73-81). <br /> A preliminary Habitat Suitability Index (HSI) model was <br /> developed from fish collections and radiotelemetry data collected <br /> by this project from 1979 to 1985 and the habitat census data of <br /> 1985 (Appendix B). The HSI is designed as a management tool for <br /> Colorado's western slope rivers. Based on model components, river <br /> segments can be ranked, shortcomings of river segments identified, <br /> and habitat improvements proposed. <br />11 <br />vii