8158

• UCREFRP Catalog Number: 8158
• Author: Osmundson, D. B.
• Title: Longitudinal Variation in Fish Community Structure and Water Temperature in the Upper Colorado River; Final Report.
• USFW Year: 1999.
• USFW - Doc Type: Grand Junction, Colorado.
• Copyright Material: NO

TABLE OF CONTENTS
LIST OF TABLES ..................................................... iii
LIST OF FIGURES ......................................................v
ACKNOWLEDGMENTS ............................................... viii
EXECUTIVE SUMMARY ............................................... ix
INTRODUCTION .......................................................1
r"Tnnn.Q ........................3
Study Area .......................................................3
Relative Abundance .................................................3
Body Condition ....................................................6
Food Habits .......................................................7
Temperature ......................................................8
RESULTS ...... ...................................... .................8
Fish Abundance . .................................. .................8
Spatial Variation ........................... ................. 8
All fish ............................... .................8
Prey-size fish .......................... ................ 11
Gunnison River ........................ ................12
Temporal Variation .......................... ................ 13
All fish ............................... ................13
Prey-size fish .......................... ................13
Habitat Variation ........................... ................ 18
Body Condition of Native Fishes ...................... ................ 18
Spatial Variation ............................ ................18
Temporal Variation .......................... ................22
Diet of Native Fishes ............................... ................ 24
Among-species Variation ..................... ................ 24
Spatial and Temporal Variation ................. ................ 28
Bluehead suckers ...................... ................28
Flannelmouth suckers ................... ................ 28
Roundtail chubs ....................... ................28
Diet of Colorado Pikeminnow ........................ ................ 28
Temperature Suitability for Colorado Pikeminnow ......... ................ 32
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