9551

• UCREFRP Catalog Number: 9551
• Author: Brunson, R. E., K. D. Christopherson and T. N. Hedrick.
• Title: Evaluation of Nonnative Fish Escapement from Starvation Reservoir.
• USFW Year: 2007.
• USFW - Doc Type: 119,
• Copyright Material: NO

with the exception of the green sunfish (of which, abundant YOY were collected) likely escaped
from the reservoir during the spill. Length frequencies for smallmouth bass, walleye, and yellow
perch throughout the study effort are given in Figures 6, 7, and 8.
Reservoir sampling
Sampling near the spillway resulted in the capture of six smallmouth bass, 20 walleye,
and 52 yellow perch (Table 4). Other species captured during this effort were brown trout and
Utah chub. The brown trout, smallmouth bass, and Utah chub were large adults. The walleye and
yellow perch were primarily age-1 and age-2 juveniles (Figure 9).
Other Duchesne River sampling
The U.S. Fish and Wildlife Service's Vernal Colorado River Fishery Project (CRFP)
sampled the Duchesne River to remove smallmouth bass and channel catfish (Ictalurus
punctatus). Results of the effort in 2005 resulted in the capture and removal of 100 smallmouth
bass and 61 channel catfish. smallmouth bass were predominantly encountered in the upper
sampling reaches (RM 17 - RM 41). Length frequencies for smallmouth bass over all four
removal passes are given in Figure 10 (figure reproduced with permission from CRFP). The
species assemblage during removal efforts was similar to that found during the 2004 Duchesne
River effort: carp, white sucker, channel catfish, smallmouth bass, and brown trout. No walleye
or yellow perch were captured during 2005.
13