9384

• UCREFRP Catalog Number: 9384
• Author: Valdez, R. A. and R. J. Ryel.
• Title: Summary of Recovery Goals for the Four Endangered Fishes of the Colorado River Basin.
• USFW Year: 2000.
• USFW - Doc Type: Logan.
• Copyright Material: NO

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Razorback Sucker - 1

RAZORBACK SUCKER

A. Site-Specific Management Actions To Achieve Recovery
The following are site-specific management actions necessary to achieve recovery.
Additional actions that contribute to recovery are identified in the Recovery Implementation
Program Recovery Action Plan (RIPRAP).

Lake Mohave
1. Regulate elevation of Lake Mohave to maximize access to spawning shoals,
stabilize shoreline spawning and nursery habitats, and protect isolated coves used
as rearmg areas.

Green River Subbasin
1. Provide and legally protect flows necessary to recover the razorback sucker,
including tributaries necessary to life history; i.e., Yampa, White, Duchesne
flvers.
2. Maintain unimpeded fish passage within occupied habitats.
3. Regulate nonnative fish releases in the main river, flood plain, and tributaries
through agreements.
4. Implement nonnative fish control, as needed, to recover the razorback sucker.
5. Investigate and determine if selenium has a significant negative effect on
reproductive success and survival of razorback sucker, and take reasonable actions
to reduce effect.

Upper Colorado River Subbasin
I. Provide and legally protect flows necessary to recover the razorback sucker,
including tributaries necessary to life history; i.e., Gunnison River.
2. Maintain unimpeded fish passage within occupied habitats; insure passage over
Price-Stub Dam and Government Highline Dam, and continued passage over
Redlands Diversion.
3. Regulate nonnative releases in the main river, flood plain, and tributaries through
agreements.
4. Implement nonnative fish control, as needed, to recover the razorback sucker.
5. Investigate and determine if selenium has a significant negative effect on
reproductive success and survival of razorback sucker, and take reasonable actions
to reduce effect.
6. Investigate modification of Aspinal Units for warmed releases to allow for
upstream range expansion in the Gunnison River.

San Juan River Subbasin
I. Provide and legally protect flows necessary to recover the razorback sucker.
2. Investigate passage over six most downstream diversions structures.
3. Regulate nonnative releases in the main river, flood plain, and tributaries through
agreements.