7090

• UCREFRP Catalog Number: 7090
• Author: Archer, D. L., L. R. Kaeding and H. M. Tyus.
• Title: Colorado River Fishes Monitoring Project Final Report.
• USFW Year: 1986.
• USFW - Doc Type: Lakewood, Colorado.
• Copyright Material: NO

TABLE OF CONTENTS

LIST OF
LIST OF

TABLES. .
FIGURES.

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INTRODUCTION. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. . .. . .. .. .. . .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. ..

METHODS.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. . . .. .. .. . .. .. .. . .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . . .. .. ..

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Population Monitoring......................................
Ra.d1oteleme try.. .. . .. . .. .. .. .. .. .. .. .. .. . .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. ..
YOY Colorado Squawfish Habitat vs Discharge................
Sensitive Reach Designations...............................
L1 fe--s tag e s. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. . .. .. .. .. . .. .. .. ..
Sensitive Reach Criteria................................

RESULTS AND DISCUSSIO-N..............................."..........

Colorado Squawfish Spawning................................
Prespawning Migrations..................................
Spa'Wl11ng Areas..........................................
Spa'WD.ing Periods................................................................................
Spawning Temperatures and discharges....................

Spawn.1ng 'Ha.b1 ta t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Annual Recruitment..

... ............. ........... ............

I..a.nal Sampling.........................................
Post-larval Sampling....................................
Discharge Affects on YOY Colorado.......................
Squawfish Production....................................
Influence of Flaming Gorge Dam..........................

Status of Juvenile and Adult Population ................... 33

SENSITIVE REACH DESIGNATIONS.................................. 37
Colorado squawflsh......................................... 37
Adult Colorado Squawfish................................ 37
Distribution......................................... 37
High Concentration Areas............................. 39
Concentration Areas .~............................... 41
Spawning Migration Routes............................ 41

Colorado squawfish spawning................. . . . . . . . . . . . . 43
Confirmed Spawning Areas............................. 43
SUapectedSpawn1ng Areas............................. 44

Larval Colorado squawfish .............................. 46

Larval Distribution.................................. 46

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YOY (Post larval) Colorado squawflsh ...................
Distribution.........................................
High Dens 1 ty Nursery Areas...........................
N\ars8ry Areas........................................

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