7056

• UCREFRP Catalog Number: 7056
• Author: Archer, D. L. and H. M. Tyus.
• Title: Yampa River Colorado Squawfish Spawning Study.
• USFW Year: 1984.
• USFW - Doc Type: Salt Lake City, Utah.
• Copyright Material: NO

LIST OF FIGURES

Page

Figure 1. The hydrologic subregions of the upper Coloardo River
basin (after Iorns et al 1965).............. ........2

"

Figure 2. Migration of 8 radiotagged Colorado squawfish to
spawning grounds in the Yampa River, 1983........... 8

Figure 3. Migration of 9 radiotagged Colorado squawfish to
spawning ground& in the Yampa River, 1981 and 1982.. 9

Figure 4 Capture-recapture locations of Colorado squawfish
recaptured by FWS in the Yampa River 1978-83. .......13

Figure 5. Netted areas producing ripe Colorado squawfish during
spawning season, primary site (RK 26, RM 16.5) Yampa

R i ve r, 1 983. . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 1 5

Figure 6. Netted areas producing ripe Colorado squawfish during
spawning season, replicate site (RK29,
RM 18) Yampa River 1983. ............................16

Figure 7. Green River sub-basin Colorado squawfish spawning
and nursery areas identified by radiotelemetry
and fish collections..... ...... .................. ...18

Figure 8.
Figure 9.
Figure 10.
Figure ll.
Figure 12.
Figure 13.
Figure 14.

Locations of radiotagged Colorado squawfish, primary
site (RK26, RM 16.5), Yampa River, 1983. .......... .20

Locations of radiotagged Colorado squawfish, replicate
site (RK 29, RM 18.0) Yampa River, 1983............ .21

Yampa River Primary Site (after OIBrien, 1984).... .....24

Yampa River Replicate Site (after OIBrien, 1984)...... .25

Mean Catch-per-effortof YOY Colorado squawfish
with seines Green River, 1979-82................... .29

Mean Catch-per-effort of YOY Colorado squawfish, with
seines Green River, 1983.. ........... ....... ... .....30

Green River discharge temperatures at Flaming Gorge,

1979-1983. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .31

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