7106

• UCREFRP Catalog Number: 7106
• Author: Ferriole, S.
• Title: Wildlife Resource Information System
• USFW Year: 1987.
• USFW - Doc Type: Colorado Squawfish Mapping Criteria for the Colorado, Dolores, Gunnison, Green, White, and Yampa Rivers.
• Copyright Material: NO

Migration and Movement
~.t
Spawning migrations by Colorado squawfish have been reported
for many years (Jordan and Everman 1896, Dill 1944, Sigler and
Miller 1963), but were not proved until recently. Holden and
Stalnaker (1975a) reported increased. catch rates of the species
during summer and suggested that movement to certain areas was
occurring. Migrations were clearly revealed when radiotagged
Colorado squawfish were .t racked to spawning sites in the Yampa River
(Tyus et al. 1982c) and Green River (Miller et al. 1983b).
Some Colorado squawfish in the Green River .sub-basin undertake
long-distance, multi-river migrations to reach spawning sites (Tyus
et al. 1982c, Wick et al. 1983). Colorado squawfish at Yampa River
spawning sites had moved upstream from the White (Radant et al.
1983, Martinez ,1986) and Green rivers, and downstream from the upper
Yampa-River (Tyus et al. 1982c, Wick et al. 1986). Some individuals
that were found in the Yampa River eventually returned to other
rivers from which they came (Wick et al. 1983). One individual
apparently migrated from the White River to a spawning site in the
Green River, then returned to the White River, traveling 615 km (381
mi) (Miller et al. 1982a). Another fish in the White River in 1983
was recaptured at a Yampa River spawning site in 1984, and was
recaptured again at the original capture site in 1985, after
traveling 700 km (450 mi) (Martinez 1986).
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