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TABLE OF CONTENTS <br />TABLE OF CONTENTS ..................................................... A-ii <br />LIST OF TABLES .......................................................... A-iv <br />LIST OF FIGURES ......................................................... A-v <br />APPENDICES ............................................................. A-vi <br />ACKNOWLEDGMENTS ................................................... A-vii <br />EXECUTIVE SUMMARY .................................................. A-viii <br />INTRODUCTION .......................................................... A-1 <br />STUDY AREA ............................................................ A-4 <br />METHODS ............................................................... A-5 <br />Capture and Marking of YOY Colorado Pikeminnow ........................ A-5 <br />Parameter Estimates ................................................... A-6 <br />Overwinter Size-Selective Mortality ...................................... A-7 <br />Movement .......................................................... A-9 <br />Winter Sampling Under Ice ............................................. A-9 <br />Winter Habitat Descriptions ........................................... A-11 <br />Winter Flow Fluctuations ............................................. A-11 <br />RESULTS ............................................................... A-12 <br />Field Catch Summary ................................................ A-12 <br />Catch Per Unit Effort and Abundance Estimates ............................ A-13 <br />Overwinter Survival and Size-Selective Mortality .......................... A-14 <br />Age-0 Colorado Pikeminnow Movement ................................. A-17 <br />Individual Fish Movement ....................................... A-17 <br />Longitudinal Fish Distribution .................................... A-18 <br />Winter Fish Sampling ................................................ A-18 <br />Winter Habitat Descriptions ........................................... A-20 <br />Winter Flow Fluctuations and Temperatures .............................. A-23 <br />DISCUSSION ............................................................ A-25 <br />Population and Overwinter Survival Estimates ............................. A-25 <br />Winter movement .................................................... A-29 <br />Effects of Fluctuating Discharge from Flaming Gorge Dam on Overwinter Survival A-31 <br />Winter sampling for age-0 Colorado pikeminnow .......................... A-34 <br />A-ii