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4) A fisheries survey should be initiated on the San Rafael River to examine the importance <br />of this tributary to both resident and nearby Green River populations of endangered <br />species. Of immediate concern is whether razorback sucker spawn in the San Rafael <br />River. This question maybe beyond the scope of the recently expanded ISMP / <br />Basinwide Monitoring Program; if so, specific efforts should be initiated. In addition, the <br />following objectives should be considered: 1) determine the importance of the San Rafael <br />River to the Colorado pikeminnow; 2) determine distribution and abundance of the <br />resident Gila spp. population and document presence /absence of Gila cypha; 3) <br />characterize the habitats used currently by endangered fish species and evaluate potential <br />use throughout the warm water portions of this drainage; and 4) collect flow and <br />temperature data to support habitat characterization. <br />Colorado pikeminnow <br />1) Greater emphasis was placed on collecting both adult and larval razorback sucker during <br />this study, i.e., sampling in this study was not rigorous enough to say conclusively that <br />pikeminnow do not spawn near Millard Canyon. The data collected does indicate that if <br />spawning does occur in the lower Green River, it presently accounts for a very small <br />portion of overall Green River production. However, if pikeminnow populations are <br />indeed on the rise as ISMP data strongly suggest, locations like Millard Canyon maybe <br />used more in the future. We recommend a more comprehensive search of this area for <br />both adults and larvae within the next five years. <br />12 <br />