7354

• UCREFRP Catalog Number: 7354
• Author: Wydoski, R. S.
• Title: Biological Review of Endangered or Imperiled Fish in the Upper Colorado River Basin.
• USFW Year: 1985.
• USFW - Doc Type: Washington, D. C.
• Copyright Material: NO

TABLE OF CONTENTS
Page
Executive Summary . . . . . . . . . . . . . . . . . . . . . . . . . i
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1
I Coordination of Biological Work . . . . . . . . . . . . . . . 2
II Synthesis of Existing Biological Data _ . . . . . . . . . . 3
III Biological Data base and Information Transfer. . . . . . . . . 5
IV Monitoring of Rare Fish . . . . . . . . . . . . . . . . . . . 5
V Recommendations for Future Biological Studies . . . . . . . . 6
Life History and Ecological Requirements of Rare Colorado
River Fish . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Augmentation or Recovery of Rare Colorado River Fish . . . . . 11
Protection and Enhancement of Rare Colorado River Fish . . . . 14
Table 1. Changes in the Upper Colorado River That Have and May Affect
the River and the Fish . . . . . . . . . . . . . . . . . 18
Table 2. Biological Summary of Rare Colorado River Fish. . . . . . 19
Colorado Squawfish . . . . . . . . . . . . . . . . . . . . 19
Humpback Chub . . . . . . . . . . . . . . . . . . . . . . 21
Bonytai 1 Chub . . . . . . . . . . . . . . . . . . . . . . 23
Razorback Sucker . . . . . . . . . . . . . . . . . . . . . 25
Figure I. Distribution of Colorado Squawfish. . . . . . . . . . . . 20
Figure 2. Distribution of Humpback Chub . . . . . . . . . . . . . . 22
Figure 3. Distribution of Bonytail Chub . . . . . . . . . . . . . . 24
Figure 4. Distribution of Razorback Sucker . . . . . . . . . . . . . 26