9363

• UCREFRP Catalog Number: 9363
• Author: Muth, R. T., L. W. Crist, K. E. LaGory, J. W. Hayse, K. R. Bestgen, J. K. Lyons, T. P. Ryan and R. A. Valdez.
• Title: Flow Recommendations for Endangered Fishes in the Green River Downstream of Flaming Gorge Dam.
• USFW Year: 1999.
• USFW - Doc Type: Lakewood.
• Copyright Material: NO

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Draft - Do Not Cite

May 1999

Page

3.14 Flows to Maintain In-Channel and Floodplain Processes. . . . . . . . . . . . . . . . . . . . . . . . 3-60

4.1 Native Fishes in the Green River Between Flaming Gorge Dam and the
Colorado River Confluence .......................................,....... 4-3

4.2 Nonnative Fishes in the Green River Between Flaming Gorge Dam and the
Colorado River Confluence ............................................... 4-8

4.3 Distribution and Abundance of Various Life Stages of Colorado Pikeminnow
in the Green River System ............,.................................. 4-19

4.4 Summary of Flow Needs for Colorado Pikeminnow in the Green River System,
Utah and Colorado ..................................................... 4-57

4.5 Comparison of Mean Daily Growth of Age-O Razorback Suckers in Fertilized
Hatchery Ponds, in Off-Channel Nursery Habitats on the Middle or Lower
Green River, or in the Old Charlie Wash Managed Wetland, . . . . . . . . . . . . . . . . . . . . 4-82

4.6 Summary of Flow Needs for Razorback Sucker in the Green River System,
Utah and Colorado ..................................................... 4-90

4.7 Estimated Hatching and Spawning Dates for Humpback Chubs in Westwater
Canyon on the Colorado River, Utah, and Associated Maximum Daily
Main-Channel Water Temperatures. . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . 4-104

4.8 Relationship Between Water Temperature and Hatching Success and Survival
of Humpback Chub Larvae. . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108

4.9 Summary of Flow Needs for Humpback Chub in the Green River System,

Utah and Colorado .................................................... 4-116

5.1 Goal and Objectives of Flow Recommendations for Endangered Fishes in the
Green River Downstream of Flaming Gorge Dam . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-6

5.2 Recommended Spring Peak and Summer Through Winter Base Flows by River
Reach and Hydrologic Condition for Endangered Fishes in the Green River
Downstream of Flaming Gorge Dam ...........,............................ 5-7

A.1 Summary of Water Volumes During April-July for Each Year of the

Research Period ....................................................... A-2

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