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eddy pool about 1 km upstream of Jones Hole Creek (RK 546.4), and at Compromise Camp (RK <br />544). Trammel nets were usually fished during crepuscular and nighttime hours, and lesser <br />amounts in day time, and were set in low velocity habitats and in the separation zone of the main <br />channel current and eddy pools (eddy lines). The number of nets set (up to six) was contingent <br />on habitat availability and accessibility. Nets were cleared offish every 2 h. Fish captured by <br />electrofishing and trammel nets were measured (total length [TL]) and sex and reproductive <br />condition was noted, if discernable. Large samples of small-bodied fish captured by <br />electrofishing were counted. In addition, endangered fishes and roundtail chubs were <br />individually weighed and scanned for a passive integrated transponder (PIT) tag. If none was <br />detected, a PIT tag was implanted and the fish was released. Special care was taken to identify <br />potential catostomid hybrids. We identified these based on morphological characteristics of the <br />mouth and body that were intermediate between putative parental types and on intermediate <br />squamation patterns and scale counts in the lateral series (Hubbs and Miller 1953). Vouchers of <br />some specimens; including catostomid hybrids, were preserved in 10% formalin and are housed <br />at the Larval Fish Laboratory, Colorado State University. <br />Browns Park habitat reconnaissance and fish sampling.-In response to finding the first <br />age-0 northern pike in upstream portions of the Green River in Browns Park in 2005 (2005 <br />annual report, RIP project 115), we made additional observations of habitat and conducted <br />additional fish sampling in Browns Park in 2006, to better understand habitat availability and <br />the distribution and abundance of northern pike. Maps and communications with area wetlands <br />managers were used to identify locations of potential wetlands and the extent of connections of <br />off-channel areas with the Green River. In late May, during the period when high releases (up to <br />193 m3/s) were made from Flaming Gorge Dam, one of us (CTW) surveyed the Green River <br />from just upstream of the Utah/Colorado state line downstream to Lodore Canyon to assess <br />whether connections existed between the river and potential flood plain wetlands that may <br />support spawning populations of northern pike and other non-native fishes. The type of <br />connection and the method of wetland filling (pumped, gravity canal, direct connections, etc.) at <br />each site was noted, with special attention given to accessibility (up or downstream) of riverine <br />11 <br />