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<br />MATERIALS AND METHODS <br />Historic Information <br />Reports and data files of UDWR, U.S. Fish and Wildlife Service <br />(USFWS), U.S Bureau of Reclamation (BOR), Ute Indian Tribe, and <br />Utah State University (USU) were searched for historic information <br />on the fishery of the lower Duchesne River. Particular emphasis <br />was- given to records of occurrence of rare native fishes. <br />Introduction information on exotic predator fishes was also noted. <br />This information was synthesized and is presented in Results. <br />Spring Electrofishina <br />1b <br />An 18-ft outboard powered hard-bottom boat equipped with two <br />fiberglass booms was used to electrofish the three river strata, <br />with the' exception of one day in stratum C when a raft with a <br />single boom was used due to anticipated low water conditions. <br />Power was supplied by an electric generator with a minimum rated <br />output of 4-kilowatts. A Coffelt Model 15 variable voltage. <br />pulsator equipped with a lapsed time clock was used to produce a <br />pulsating direct current. Electrode arrays consisted of 12-inch <br />diameter spheres suspended from each boom. <br />Sampling methods followed protocol established far the Interagency <br />Standardized Monitoring- Program (ISMP), of the Recovery <br />7 <br />