WSP06287

• File Number: 8240.300.20
• Description: San Juan River Recovery Implementation Program
• State: CO
• Basin: San Juan/Dolores
• Date: 11/1/1994
• Author: Biology Committee
• Title: San Juan River Recovery Implementation Program Annual Research Report Fiscal Year 1993
• Water Supply Pro - Doc Type: Publication

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TABLE OF CONTENTS

EXECUTIVE SUMMARY. i

TABLE OF CONTENTS. iii

LIST OF TABLES . iv

LIST OF FIGURES. viii

INTROUCTION 1

STUDY AREA Z

METHODS . . . . . 5
Electrofishing 5
Tramel Netting. .. . . . 5
Rare Fish Species. . . . . . . . . . . . . . . . . 7
Compilation of Data. . . . 7

RESULTS AND DISCUSSION . . . . . . . . . . . . . . . . . 8
Distribution and Abundance . . . . . . . . . . .. .. 8
Size Structure . . . . . . . . . . . . . . . . . . . . . . .. 12
Rare Fish . . . . . . . . . . . 21
Distribution . . . . . . 21
Colorado Squawfish ZI
Roundtail Chub . . 24'
Sightings . . . . . . . . 24
Radio Telemetry . . . . . 24
Movement and Habitat Use 28
Spawning Areas . . . . . 28
Movement Barriers . . . . . 32
Radio Tracking Difficulties 32
1994 Schedule . . . . . . . . 34

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APPENDIX I (Electrofishing CPUE data)

APPENDIX II (1991-1992 Flow data) . .

APPENDIX III (Length and weight data and YOY-Juvenile-Adult breakdowns
for fish sampled on adult monitoring trips 1991-1993) . .

APPENDIX IV (Contacts with five radio-tagged Colorado squawfish tagged
between April 13, 1993 and October 8, 1993) . . . . . . .

APPENDIX V (Colorado squawfish original capture locations)

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