8204

• UCREFRP Catalog Number: 8204
• Author: Tyus, H. M.
• Title: Razorback Sucker ‎(Xyrauchen texanus)‎ Recovery Plan.
• USFW Year: 1998.
• USFW - Doc Type: Boulder, Colorado.
• Copyright Material: NO

Stepdown Outline
1. Prevent extinction of major extant razorback sucker populations and permanent loss
of genetic diversity of existing~opulations.
1.1. Protect fish in refugia and maintain genetic diversitX .
1.1.1. Maintain adequate refugia.
1.1.2. Collect razorback suckers for refugia.
1.1.3. Manage genetic composition of razorback sucker refugia
populations.
1.1.3.1. Maintain diversity found in wild populations.
1.1.3.2. Identify and maintain separate stocks if necessary and
determine significance to recovery.
1.1.3.3. Determine degree of hybrid introgression and potential for
affecting recovery effort.
1.2. Restore physical habitats and provide fish access.
1.2.1. Restore water flows.
1.2.2. Restore fish passage.
1.2.3. Reduce contaminants.
1.3. Reduce adverse biological impacts.
1.3.1. Control nonnative fishes.
1.3.1.1. Control nonnative fish in razorback habitat.
1.3.1.2. Stop movement of nonnative fish into razorback habitat.
1.3.1.3. Prevent new introduction of nonnative aquatic species.
1.4. Augment wild.~opulations.
1.4.1. Introduce and protect wild larvae life stages.
1.4.2. Introduce and protect juvenile or adults.
1.5. Monitor populations and habitat status.
1.5.1. Develop standardized population monitoring procedures.
1.5.2. Implement population monitoring programs.
1.5.3. Compile and analyze population data.
1.5.4. Monitor habitat.
1.5.5. Compile and analyze habitat data.
2. Establish and protect additional wild populations.
2.1. Develop criteria for selecting additional recovery areas.
2.2. Assess restoration and access needs.
2.2.1. Determine flow, water level requirements.
2.2.2. Determine effects of contaminants.
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