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000193 ~ approach to evaluate light traps as monitoring gear would be to release batches of marked larvae into the Green River during the sampling season. Subsequent sampling with light traps could document dispersal rates, identify important nursery habitats, and other insights into efficacy of light-trap sampling to assess annual reproductive output of razorback suckers. Data gathered may be useful to evaluate effects of implementation of Flaming Gorge flow and temperature recommendations and to evaluate whether stocked hatchery fish are reproducing. Ifpossible, measure individual PIT_tagged fish to be stocked. This will allow investigation of possible size-dependent effects on survival and may guide future fish culture and stocking practices. Implement more rigorous quality assurance and quality control of data gathered in monitoring and stocking programs. Integration of databases will facilitate efficient data analysis and maximize information gained. ~ Hawkins, J.A. 2003. Recapture and growth rates ofthree Colorado River endangered fish species: a comparison between electro fishing and non-electrofishing gear. Final Report of Larval Fish Laboratory, Colorado State University, Fort Collins, Colorado to Upper Colorado River Endangered Fish Recovery Program, Denver, Colorado. ~ Continue to use electro fishing when required and appropriate for endangered fish sampling. Ensure electrofishing equipment is configured and operating properly. Establish standard protocols and provide frequent training of field crews in netting, electrofishing, and fish handling techniques that reduce stress and injury to fish. Follow tagging and data reporting protocols to ensure accurate and reliable ~ ~ ~ data. McAda, C.W. 2002. Population size and structure of humpback in Black Rocks, 1998-2000. Final Report of US. fish and Wildlife Service, Grand Junction, Colorado to Upper Colorado River Endangered Fish Recovery Program, Denver, Colorado. ~ Continue sampling at Black Rocks to estimate population size according to Recovery Program time frame. Continue use of trammel nets, but evaluate alternate techniques that might be less stressful even though they are less effective. Sampling should occur during mid September to mid October when water temperatures range between 10 and 150C. Explore use of open population models to compare with results from closed population models. ~ ~ Snyder, D.E. 2003. Computer-interactive key to sucker larvae and early juveniles of the Upper Colorado River Basin with description of longnose sucker. Final Report of Larval Fish Laboratory, Colorado State University, Fort Collins, Colorado, to Upper Colorado River 2003 Report Recommendations,