9689

• UCREFRP Catalog Number: 9689
• Author: Recovery Implementation Program.
• Title: Recovery Implementation Program For Endangered Fish Species In The Upper Colorado And San Juan River Basins - 27th Annual Recovery Program Researchers Meeting Program.
• USFW Year: 2006.
• USFW - Doc Type: Moab, UT.
• Copyright Material: NO

continued to be monitored and estimates for this species was conducted as well. The
1998-2000 and 2003-2005 estimates indicated that the round tail population was stable.
Historical catch rates for roundtail chub were variable over the years but overall appeared
to be stable.

11. Evaluation of nonnative fish escapement from Starvation Reservoir, Utah

Author: R. BRUNSON, U.S. Forest Service

Abstract: The Recovery Program has determined that control of nonnative fishes is
necessary for recovery of the endangered fishes. Chronic escapement of nonnative fishes
from reservoirs or other impoundments and dispersal in to riverine habitats occupied by
the endangered fishes where they potentially pose a significant predatory or competitive
threat has been identified as a problem. Control of escapement through screening or
other types of fish barriers is costly, and the need for sucks nonnative fish control
measures needs to be evaluated on a case-by-case basis. Starvation Reservoir, located in
northeastern Utah and within the Duchesne River drainage, was identified for such an
evaluation beginning in 2002. It is a 3,310 surface area reservoir impounding water from
the Strawberry River and Duchesne River, which is diverted into the reservoir through
the Knight Diversion. Initial filling of Starvation Reservoir began in 1969 and is used
primarily for irrigation. The Utah Division of Wildlife Resources manages the reservoir
as a walleye, smal1mouth bass and brown trout fishery. Escapement rates of Sportfish
from Starvation Reservoir are evaluated by draining the stilling basins of the spillway and
outlet by pumping. Sampling results indicate that target species (smal1mouth bass and
walleye) are escaping, though in low numbers. These species are not found immediately
downstream of the reservoir in the Strawberry River; however, smal1mouth bass are
established in the Duchesne River and Green River and walleye are encountered, though
not often, in the Green River.

12. 2005 Middle Yampa River Northern Pike (Esox lucius) Removal and
Evaluation

Authors: LORI M. MARTINI and JOHN A. HA WKINS2. IColorado Division of
Wildlife, 711 Independent Ave., Grand Junction, CO 81505, Phone: [phone], FAX:
970-255-6111, Email: [e-mail]. 2Larval Fish Laboratory, Dept. of Fishery
and Wildlife Biology, Colorado State University, Fort Collins, CO 80523, Phone: 970-
491-2777, FAX: [phone], Email: [e-mail]

Abstract: A self-sustaining, nonnative population of northern pike (Esox lucius) is
established in the Yampa River of Colorado, coexisting with federal- and state-listed
Colorado pikeminnow (Ptychocheilus lucius), humpback chub (Gila cypha), bonytail
(Gila elegans), and razorback sucker (Xyrauchen texanus). Colorado Division of
Wildlife and Colorado State University crews used boat-mounted electrofishing gear and
trammel nets to capture northern pike in approximately 77 miles of critical habitat
downstream of Craig, Colorado. A total sampling effort of 415 hours was expended in
the middle Yampa River reach from April 22 through July 21,2005. Northern pike were

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