7834

• UCREFRP Catalog Number: 7834
• Author: Burdick, B. D. a. R. B. B.
• Title: Experimental Stocking Of Adult Razorback Sucker In The Upper Colorado And Gunnison Rivers.
• USFW Year: 1997.
• USFW - Doc Type: \
• Copyright Material: NO

TABLE OF CONTENTS
LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
LIST OF APPENDICES . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
ACKNOWLEDGMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
General .............................. 1
Background . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Purpose and Objectives . . . . . . . , . . . . . . . . . . . . . . . 2
STUDY AREA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
METHODS ................................. 3
RESULTS AND DISCUSSION . . . . 5
Movement, Dispersal Patterns, and Survivorship . . . . . . . . . . 5
Upper Colorado River . . . . . . . . . . . . . . . . . . . . 5
Gunnison River . . . . . . . . . . . . . . . . . . . . . . . 8
San Juan River . . . . . . . . . . . . . . . . . . . . . 14
Reasons for Low Survival . . . . . . . . . . . . . . . . . . . . . 16
Habitat Use . . . . . . . . . . . . . . . . . . . . . . . . . 18
Upper Colorado River . . . . . . . . . . . . . . . . . . . . 18
Gunnison River . . . . . . . . . . . . . . . . . . . 19
Spawning Surveys (Objective No. 3) . . . . . . . . . . . . . . 21
Provide Recommendations for the Number and Size
for Stocking Razorback Sucker (Objective No. 6) . . . . . . . . . 22
CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FUTURE STOCKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
LITERATURE CITED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
APPENDICES
Appendix A--List of PIT-tagged Razorback Sucker Stocked in the Upper
Colorado and Gunnison rivers, Spring 1994 and Fall 1995
Appendix B--Individual Habitat Use for Radiotagged Fish in the Upper
Colorado and Gunnison rivers, 1994 and 1995
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