7957

• UCREFRP Catalog Number: 7957
• Author: Cranney, J. S.
• Title: Lower Duchesne River Fishery Investigations - 1993 - Draft Report.
• USFW Year: 1994.
• USFW - Doc Type: \
• Copyright Material: NO

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introduced into the Yampa River drainage by the Colorado Division
of Wildlife. Black crappie were apparently introduced illegally
into Kenney Reservoir on the White River in the late 1980's (Tom
Nesler, Colorado Divison of Wildlife, pers. comm.).
Spring Electrofishing
A total of 23.35 hours of electrofishing was completed during the
spring high flow season in the three sampling strata (stratum A --
4.59 hours, stratum B -- 7.10 hours, stratum C -- 11.66 hours).
2,116 fish comprising 17 different species were identified (Table
5). Seven of the 17 species were native fishes.
Seven Colorado squawfish, two razorback suckers, and one roundtail
chub were captured during spring surveys (table 6). Three Colorado
squawfish (0.65/hr) and two razorback suckers (0.44/hr) were
captured in stratum A. Four Colorado squawfish '(0.56/hr) were
captured in stratum B and two razorback suckers were positively
identified but not captured. No endangered fishes were captured in
stratum C. A single roundtail chub Gila robusta was captured in
stratum B. Sampling dates in stratum C were considerably later
than in strata A and B (June 17 and 18 vs. May 25,26 and June 1).
Flows dropped sharply in early June and then increased again about
June 16 allowing for sampling of stratum C. Research on the nearby
White River has uocumented a large-scale movement of_ Colorado
squawfish from the White River to Green River spawning areas in
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