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

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Table 1. Initiation of Colorado squawfish spawning migration to Yampa River
spawning ground, 1981-1983.
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Year Type Water Discharge2 Migratio~ Water Temperature(C)2
Year Period
1981 Low Mean 3,643 5/12-6/5 Mean =12.6
Max. = 5,570 Max. =16.0
Min. = 1,570 Min. = 9.5
1932 Ave. Mean = 7,375 6/10-6/20 Mean =12.6
Max. = 8,310 Max. =15.0
Min. = 7,040 Min. =10.5
1983 High Mean = 8,891 6/10-7/10 Mean =13.4
Max. =11,400 Max. =18.0
Min. = 5,540 Min. = 8.5
1 Designation of low, average, and high water years after Butler (1988) (i.e.,
low:<1514cfs, average:1514-2760cfs, high:>2760cfs).
Z USGS records (Maybell Gauge).
3 Period of spawning migration represents the interval between first and
last contact with radiotagged fish moving to Yampa River spawning grounds.
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