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<br />. <br /> <br />_USGS <br /> <br />scioncB for a changing world <br /> <br />Highlights of 2003 Mechanical <br />Removal of Non-Native Fishes <br />From the Colorado River <br /> <br />Southwest Biological Science Center <br />Grand Canyon Monitoring and Research Center <br /> <br />Lew Coggins and Mike Yard <br /> <br />U.S.Oepartffi(lntolthelnferlQr <br />U.S. Goologfcal 5urvey <br /> <br />Study Objectives <br /> <br />· Effect of Adult RBT and BNT on the Population <br />Dynamics of the LCR HBC Population. <br />. Will humpback chub recruitment increase as a result of <br />non-native removal? <br />· Efficacy of Mechanical Removal of Adult RBT and <br />BNT from the LCR Inflow Reach. <br />. To what extent can we remove non-native fishes from a <br />large reach of the Colorado River? <br />· Rainbow and Brown Trout Diet Analysis and <br />Predation. <br />. What are non-native fish eating? <br /> <br />III USGS <br />