WSP04979

• File Number: 8240.200.10.B
• Description: UCRBRIP - Riverine Fish Flow Investigations
• Basin: Colorado Mainstem
• Date: 6/1/1999
• Author: CDOW
• Title: Riverine Fish Flow Investigations 1999
• Water Supply Pro - Doc Type: Publication

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TABLE OF CONTENTS

LIST OF TABLES ........... ,......,.., ,............,.............,.", ,.,...,......,...,...,......." ...., ,....,...'..'......". v

LIST OF FIGURES...... .....,......", ......"..,.,...,............... ........."...".. .......,..,..,..."....,'.'..,..,..,.,.... VI

INTRODUCTION ............. ............ .......,....,....'......,....................',......,.......,...,........,.........,' ...... I
Study Objectives.......................,..........................................................,....,..................,... 2

STUDY AREA ... ............... ................... ........,.... ....,........................ ......' ........., ............ ...... ......2

MATERIALS AND METIIODS..... ......... ..... ....... ......... ......... .,. '.. ........ ..........,.............. ... ...........4
Fish samples .... ... ............ ...... .... ... ... ..... ...... ........ ....... .......... ......... .... ............. .......4
Invertebrate samples........ ..................... .... ........... ......... .........' .'.. ........ ........ ... ....... 5
Habitat mapping..................................................................,...,............................ 5
Hydraulic simulation....... ....................... .................... .......... .....................,.. ........6
Habitat availability.......... .......................... ................... .......... .... ...........' ....... ....... 8

RESULTS... .......... .......... .... .... .... .......... ....... ................. ...... ........ ..... ...... ..... ....,......... ..... ...... ......9
Fish Samples....................................................,...................,............................... 9
Species composition....................................................................................... 9
Density and biomass estimation.........,.......................................................... II
Size and length frequency.........,.,... ..... .... ........,... ............. '... '. ....... .... ... ....... .13

Invertebrates... ..... ........., ................... ........................... ......... '... '............ ............14
Habitat Composition ... .....,...... ...... ........... .............. ........................., .... .......... ....16

DISCUSSION... ........... ..... ...... ..... ........... .................. .............. ....... ............ ................... ........ .19
Fish Samples .....................................................................................................19

Invertebrates...................................................................................................... 20
Habitat Composition.......................................................................................... 21

SUMMARY AND CONCLUSIONS ................................ ..................... ....................... ............21

RECOMMENDATIONS .............. .......... ................................ ............................ ......................22

ACKNOWLEDGEMENTS.......................................................................................................22

REFERENCES ................... ........................................ ................ ............................... ... ......... ...23

APPENDIX 1, Fish Data... ............ .......... ........ ................. .............. .......................... ..... ............25

APPENDIX 2, Invertebrate Data..................................... ........ ........... ............ ..... .......... ........ .... 33

APPENDIX 3, Habitat Data...................................................................................................... 39