9555

• UCREFRP Catalog Number: 9555
• Author: Bestgen, K. R., C. D. Walford, A. A. Hill and J. A. Hawkins.
• Title: Native Fish Response to Removal of Non-native Predator Fish in the Yampa River, Colorado.
• USFW Year: 2007.
• USFW - Doc Type: 140,
• Copyright Material: NO

TABLE OF CONTENTS
EXECUTIVE SUMMARY
.............................
LIST OF TABLES ...............................................................v
LIST OF FIGURES .............................................................. vi
KEY WORDS ................................................................ vii
INTRODUCTION ................................................................1
STUDY AREA .................................................................2
METHODS ....................................................................3
Fish removal studies background ........................................... 3
Stream flow and water temperature data collection and presen[ation ............... 6
Age-0 smallmouth bass age and growth ...................................... 6
Native fish evaluation data analysis ......................................... 7
RESULTS AND DISCUSSION .......................................................7
Yampa River stream flow and water temperatures .............................. 7
Yampa River habitat sampled .............................................. 8
Yampa River fishes, species composition ..................................... 9
Yampa River fishes, relative abundance ..................................... ] 0
Yampa River fishes, control-treatment reach comparisons ....................... 11
Yampa River fishes, isolated pool and main stem river comparisons ............... 15
Yampa River fishes, statistical comparisons .................................. 16
Yampa River age-0 smallmouth bass age and growth . .......................... 18
Yampa River fishes, hypotheses regarding native fish response ................... 19
CONCLUSIONS ...............................................................22
RECOMMENDATIONS ..........................................................22
ACKNOWLEDGMENTS ..........................................................23
REFERENCES .................................................................24
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