7418

• UCREFRP Catalog Number: 7418
• Author: Tyus, H. M. and C. A. Karp.
• Title: Stream Flow Needs of Rare and Endangered Fishes, Yampa River, Colorado.
• USFW Year: 1988.
• USFW - Doc Type: Vernal, Utah.
• Copyright Material: NO

LIST OF FIGURES

Figure 1. Major water development projects and their impacts in the
Colorado River Basin (after Tyus 1984) ........................ 2
1 Figure 2. Average annual distribution hydrograph for the Green and Yampa
rivers, I951-1962 and 1964-1984 ............................... 3
Figure 3. Study area and sampling strata of the Yampa River, 1981....... 6
Figure 4. Habitat use by radiotagged Colorado squawfish,
1 Yampa River, 1981-1985, 1987 . ................................ 8
Figure 5. Spawning migrations of radiotagged Colorado squawfish,
Yampa River, 1981-1985, 1987 .................................. 10

Figure 6. Discharge-temperature relationships and initiation of
spawning migration for Colorado squawfish,
Yampa River, 1981-1983 ........................................ I4
r^igure 7. Discharge-spawning period relationship for Colorado squawfish,
Yampa River, 1981-1987 ........................................ 17
Figure 8. Migrations of radiotagged Colorado squawfish ( ),
collections of ripe Colorado squawfish ( ), and estimated
' spawning times from bac}ccalculation of larval Colorado
squawfish (- --) as estimators of optimum spawning periods
Yampa River, 1981-1987 ........................................ 18
r^igure 9. Sediment transport, total and optimal spawning periods,
Yampa River, 1981-1986 ...................... ................. 21
' Figure 10. Colorado squawfish spawning and primary nursery habitat
Green River Basin, Colorado and Utah .......................... 25
cFigure 11. Discharge-backwater.habitat availability relationships, upper.
Green River, 1987.. ...... ..... ... ... ..... 41
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