9439

• UCREFRP Catalog Number: 9439
• Author: Upper Colorado River Endangered Fish Recovery Program.
• Title: Nonnative Fish Control Workshop
• USFW Year: 2002.
• USFW - Doc Type: Summary, Conclusions, and Recommendations.
• Copyright Material: NO

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• Revise State regulations to reflect changes izi Nonnative Fish Stocking ,
Procedures.
Continue population estimates of fishes in the Upper Colorado River and, where

feasible, use those efforts and results to help assess effects of control measures. '
• Do not proceed with large-scale efforts to mechanically remove nonnative fishes
(especially centrarchids) from backwaters and other low-velocity habitats used as '
nurseries by native fishes.
• Continue management of select floodplain depressions to enhance survival of
early life stages of native fishes (especially razorback sucker). Include removal of '
nonnative fishes as a component of the management strategy for select floodplain
depressions.
• Continue to maintain and monitor the Highline Lake Fish Barrier Net. Based on '
the amount of deterioration in net strength since installation in 1999 (about 33%),
Recovery Program will need to consider replacement of the net over the next 2-3
years. '
• Continue removal and translocation of northern pike from critical habitat in the
Yampa River (i.e., downstream of Craig, Colorado, to Dinosaur National
Monument). '
• Continue removal and translocation of northern pike from the established upper
Yampa River sites (upstream of Craig, Colorado). Coordinate with northern pike
exclusion assessment (Project No. CAP-31) to prevent confounding effects on '
exclusion study.
• Explore the possibility of implementing a bounty on northern pike, and if feasible,
implement. '
• Plan and prepare for removal and translocation of smallmouth bass and channel
catfish in the Yampa River during northern pike translocation (potentially
implement smallmouth bass and channel catfish removal/translocation at some
'
level in 2002).
• Continue population estimates of fishes in the Yampa River and, where feasible,
use those efforts and results to help assess effects of removal/translocation.
'
• Remove northern pike as encountered from the Gunnison River as part of fish
population monitoring and research. No specific removal or translocation project
is required. ,
• Continue mechanical removal of northern pike from the middle Green River
(Island Park to confluence of White River). Target flooded areas and tributary

mouths (e.g., Cliff Creek, Ashley Creek, Duchesne River, White River) in early '
spring (April, May, June) to remove northern pike, as well as smallmouth bass,
channel catfish, carp, green sunfish, black crappie, bluegill, walleye.

• Do not proceed with large-scale efforts to mechanically remove young channel ,
catfish in the middle and lower Green River.
• Implement removal of channel catfish in Desolation/Gray canyons using fyke nets '
to target subadults, and electrofishing to target large adult spawners. Also
consider angling as a capture method.
• Continue removal of channel catfish in Yampa Canyon by angling and ,
electrofishing.
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