7125 ‎(2)‎

• UCREFRP Catalog Number: 7125
• Author: McAda, C. W.
• Title: Aspects of the Life History of Three Catostomids Native to the Upper Colorado River Basin.
• USFW Year: 1977.
• USFW - Doc Type: Utah State University,
• Copyright Material: YES

iii
TABLE OF CONTENTS
Page
ACKNOWLEDGMENTS ii
LIST OF TABLES v
LIST OF FIGURES vi i
ABSTRACT x
INTRODUCTION 1
DESCRIPTION OF STUDY AREA • 6
MATERIALS AND METHODS 10
Physical Parameters 10
Collection of Fish 10
Movement 10
Fecundity 11
Age and Growth 13
RAZORBACK SUCKER, Xzyrauchen texanus. (ABBOTT) 16
Distribution and Abundance 16
Age and Growth 28
Length-weight relationship . 28
Back-calculation of growth . , 28
Reproduction 33
Spawning period , 33
Fecundity 37
Movement 39
Yampa River 39
Walter Walker Wildlife Area 44
Summary of movement , 45
Food Habits 46