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• Sampling, although not rigorous in 1994, was likely timed correctly based on similar <br />sampling conducted in Desolation Canyon. <br />• Sampling was more rigorous in 1995, but may have been premature -again, as <br />determined by results of sampling in Desolation Canyon. <br />• If pikeminnow spawn near the Millard Canyon baz it is likely a very small group offish <br />in comparison to the Yampa and Gray Canyon congregations. <br />Objecitve 6: determine presence /absence of larval pikeminnow in the lower SO km of the Green <br />River. <br />• Sampling for larval pikeminnow only occurred in 1995. <br />• No larval pikeminnow were collected below the suspected spawning site at RK 53.9. <br />• See obj 5. for reference to potential problems with time of sampling. <br />• Specific collection data (time and location) of 8 eazly larval pikeminnow in 1996 <br />(subsequent to these investigations) continues to suggest that spawning maybe occurring <br />in the lower Green River. <br />RECOMIVIENDATIONS <br />Razorback sucker <br />1) The number of adults in the lower Green River appears extremely low. The Recovery <br />Implementation Program for the UCRB should consider increasing recovery actions by: <br />a) genetically comparing razorbacks collected in the lower Green River with those from <br />other Upper Basin locations, b) initiate either brood stock development or enhancing <br />existing Green River hatchery stocks with lower Green River razorbacks based on the <br />outcome of the genetic analysis, c) fully investigate the potential for habitat development <br />in the lower Green and San Rafael Rivers. <br />2) Larval razorback sucker monitoring should be expanded temporally as well as spatially <br />(to include a site(s) upstream of the mouth of the San Rafael) to determine duration of the <br />spawn, peak spawning times, lower Green River spawning location, and immigration <br />rates of middle Green River spawned fish (as outlined in the Basinwide Monitoring Plan <br />(Muth 1995)). <br />3) Increased effort should be made to collect adult razorback suckers in the lower Green <br />River in the vicinity of the San Rafael confluence and in the San Rafael proper for the <br />purposes of radio telemetry (to locate spawning azeas /more adults) and / or to <br />supplement hatchery stocks (see Rec #1). <br />11 <br />