7136

• UCREFRP Catalog Number: 7136
• Author: Johnson, J. E., et al.
• Title: Flaming Gorge Tailwater Fisheries Investigations
• USFW Year: 1987.
• USFW - Doc Type: Trout Growth, Harvest, Survival, and Microhabitat Selection in the Green River, Utah, 1978-82
• Copyright Material: NO

TABLE OF CONTENTS
Page
LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
LIST OF APPENDIX TABLES , , , , , , , , , , , , , , , , , , , , , , , xi
LIST OF APPENDIX FIGURES . . . . . . . . . . . . . . . . . . . . . . . xiii
ACKNOWLEDGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
OBJECTIVE #1 -- ASSESS TROUT GROWTH RESPONSE TO ELEVATED
HYDROELECTRIC WATER RELEASE TEMPERATURES . . . . . . . . . . . . . . 15
METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
OBJECTIVE #2 -- DESCRIBE ANGLER USE AND HARVEST TRENDS,
SEASONAL MORTALITY, AND MIGRATION OF STOCKED FINGERLINGS. . . . . . 37
METHODS - OBJECTIVE #2 . . . . . . . . . . . . . . . . . . . . . . 37
Trout stockings and marking . . . . . . . . . . . . . . . . . . 37
Creel survey and sportfishery trends . . . . . . . . . . . . . 38
Electrofishing catch trends, , . . . . . . . 41
Site specific dye marks -- movement between stocking
sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Movement and harvest of tagged trout . . . . . . . . . . . . . 42
RESULTS -- OBJECTIVE #2 . . . . . . . . . . . . . . . . . . . . . 43
SPORTFISHERY TRENDS . . . . . . . . . . . . . . . . . . . . . . 43
Angler use and harvest . . . . . . . . . . . . . . . . . . . 43
Return to creel of stocked fingerlings. . . . . . . . . . . 45
Yield . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Cohort longevity. . . . . . . . . . . . . . 50
Fish release rates, terminal tackle, and hooking mortality. 59
Characterization of raft use. . . . . . . . . . . . . . . 69
Summary-sportsfishery trends. . . . . . . . . . . . . . . . 69
SEASONAL MORTALITY AND MIGRATION OF STOCKED FINGERLINGS. . . . 71
Electrofishing catch trends . . . . . . . . . . . . . . . . 71
(continued)
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