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FWS/OBS-82/38 July 1982 FISH RADIOTELEMETRY: THEORY AND APPLICATION FOR HIGH CONDUCTIVITY RIVERS By Haroid M. Tyus U.S. Fish and Wildlife Service 447 E. Main Street Vernal, UT 84078 Project Officer Carl L. Armour Western Energy and Land Use Team U.S. Fish and Wildlife Service Drake Creekside Building One 2625 Redwing Road Fort Collins, CO 80526 Prepared for Western Energy and Land Use Team Office of Biological Services Fish and Wildlife Service U.S. Department of the Interior Washington, DC. 20240 CONTENTS Page EXECUTIVE SUMMARY ........................................................ iii FIGURES .................................................................. v TABLES.. ........................................................ vi ACKNOWLEDGEMENTS ......................................................... vii INTRODUCTION.. .............................................. .............. THEORETICAL CONSIDERATIONS ............................................... Types of Telemetry ... .......................................... U]trasonics Telemetry ................................. ...... Radiotelemetry .............................................. Radio Transmitting Antennas ....................................... Radio Receiving Systems ........................................... RADIOTELEMETRY FIELD STUDIES ............................................. Background.. ... .................................... ............ .... Prior Research in the Green River .................................. U.S. Fish and Wildlife Service Field Studies ....................... Introduction .................................................. Methods.. ... ......................................... Results and Discussion ........................................ Conclusions ................................................... REFERENCES .............................................................. iv 1 2 2 2 3 5 8 12 12 15 16 16 16 21 23 25