9473

• UCREFRP Catalog Number: 9473
• Author: Anderson, R. and G. Stewart.
• Title: Riverine Fish Flows Investigations.
• USFW Year: 2001.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

Table of Contents

APPROVAL PAGE.................................................................................. ...................................... iii

LIST OF TABLES................................................................ ........... .................................................v

LIST OF FIGlJRES ......................................................................................................................... vi

INTRODUCTION........................................................................................................ ................... 1

STUDY AREA................................................................................................................................ 3

METHODS......................................................................... ................................. '" ................. .......10

Fish samples........................................... .............................................................. ........... ....10

Habitat mapping................. ............................................................................................... ..13

Hydraulic simulation ................ .......... ......... ................................................ ....... ........... ....17
Habitat availability ............................................................................................................. .18

RESULTS and DISCUSSION............................... .................................................................... ......20

Species Composition............................................... ............... ......................................... ....20

Yampa River ............................................................................................................... ..20

Colorado River ............................................................................................................ .24

Dolores River....................... .............. .................... .............. .................................. ........27

Length Frequency (by species) .......................................................................................... ..27

Density Estimation.............................................................................................................. 3 3

Yampa River ................................................................................................................. 3 3

Colorado River ................................... .................. .......... ......................................... .....37

Dolores River ................................................................................................................ 3 9

Habitat Composition (Duffy and Colorado River)...............................................................40

Radio Telemetry ................................................................................................................ .45

SU11J\1AR Y .............................................................................................................................. .... .46

CONCLUSIONS AND RECOMMENDATIONS............... .......... ..... ............................ ............. ....48

ACKNOWLEDGEMENTS.............................................................................................................48

REFERENCES .................... ......... .... ..... ........ ...... ................. ....... ........ ......... '" .... ........ ....... ..... ...... .50

APPENDIX TABLES AND FIGlJRES.......................................... ....... .................... .................. ....52

IV