8087

• UCREFRP Catalog Number: 8087
• Author: Valdez, R. A. and B. R. Cowdell.
• Title: Lake Powell Inflow Study. Annual Summary Report - 1994.
• USFW Year: 1994.
• USFW - Doc Type: 453-1,
• Copyright Material: NO

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TABLE OF CONTENTS

EXECUTIVE SUJ\1l\.1AR Y ......................................................... ill

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 1

1.1 PURPOSE AND OBJECfIVES ............................................ 1

1.2 BACKGROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .' 1

2.0 S11JDY AREA ............................................................... 2

3.0 lVIETHODOLOGY ............................................................ 3

3.1 BASIC STUDY DESIGN ................................................. 3

3.2 SAl\1PLING GEAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

3.2.1 Electrofishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

3.2.2 Seining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 3

3.2.3 Trapping. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 4

3.3 STOMACH CONTENT ANALYSIS ......................................... 4
3.4 DATA COLLECflON AND STORAGE ..................................... 5

4.0 RIVER FLOWS AND WATER TEMPERATURES................................... 5

5.0 RESULTS ................................................................... 5

5.1 SUMMARY OF FISH COLLECflONS ...................................... 5
5.2 FISH COLLECflONS BY GEAR TYPE wrrn: CPE STATISTICS ................. 7

5.2.1 Electrofishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 7

5.2.2 Seines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 8

5.2.3 Larval Light Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8

5.3 STOMACH CONTENT ANALYSIS ......................................... 8
5.4 SUMMARY OF ENDANGERED FISH CAPTURED ........................... 9

5.4.1 Colorado Squawfish .............................................. 9

5.4.2 Gila sp. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 9

Ll1'ERA TURE Cl1'ED ........................................................... 10

UST OF APPENDICES

APPENDIX A - SUMMARY OF TIiREATENED AND ENDANGERED FISH HANDLED

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