3102

• UCREFRP Catalog Number: 3102
• Author: Wick, E. J., J. A. Hawkins and C. A. Carlson.
• Title: Colorado Squawfish and Humpback Chub Population and Habitat Monitoring 1983-1984.
• USFW Year: 1985.
• USFW - Doc Type: Ft. Collins, CO.
• Copyright Material: NO

spawning (200C), and base flow (120C). However, due to extremely
high flows in the spring of 1984, sampling was conducted only
during the spawning and base flow periods. In 1983, one squawfish
(a triple recapture) was collected on the Yampa River. In 1984, 19
squawfish, were collected, four of which were recaptures.
Collection of seven ripe or tuberculated squawfish in Yampa Canyon
(RMI 17.7-18.6) indicated that this area was used for spawning in
1984. This area was a suspected spawning site from 1981 to 1983.
During the period 1979-1984, 37 Colorado squawfish (12 from
the Colorado River and 25 from the Yampa River) were recaptured in
CDOW studies or in CROW cooperative studies involving the USFWS or
NPS. Analysis of recapture data tends to support radiotelemetry
data from past studies and indicates:
1. Squawfish tended to have a preference for certain river
reaches; they return to the same river segments after
spawning migrations and are found in the same area over a
period of years (we define this as fidelity to a river
reach).
2. Squawfish returned to the same spawning area (lower 20 miles
of Yampa Canyon) either in successive or alternate years (we
define this as fidelity to a spawning area).
3. Squawfish migrated long distances both up- and downstream to
spawning sites.
4. Squawfish moved into or recruited into the Yampa River from
other rivers.
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