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suckers was successfully netted, reproductive condition was not discernable. Although trammel netting and seining efforts were limited, some interesting observations were noted. Although no northern pike were captured or observed by electrofishing crews above RM 5.0, three were captured in trammel nets set in mid-September (RM 6.3, 7.2, 7.5). The size of these three pike (380, 381, 403mm) suggest that they were only one to three years old. This could suggest that they were spawned in the vicinity rather than migrating from the Yampa River. Of 3599 fish identified from 13 seine hauls, only one specimen representing the native fish fauna was observed, a young-of-year bluehead sucker. The sampling area (RM 6.1-7.7) was very limited due to the aforementioned problems in securing access across tribal lands. As expected, exotic fish predominated in the YOY classes, juveniles, and adults with all sampling methods. The most evident predator fish in the Duchesne River is the introduced smallmouth bass. Populations appear to be self- sustaining with several year-classes represented in spring-runoff electrofishing (Appendix A). ISMP data from the nearby Green River suggests that the Duchesne River provides a significant recruitment source of smallmouth bass to the Green River. Thies data also suggests that the smallmouth bass population ir_ the Green River is• 33