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Last modified
7/14/2009 5:02:36 PM
Creation date
5/18/2009 12:09:01 AM
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Template:
UCREFRP
UCREFRP Catalog Number
9552
Author
U.S. Fish and Wildlife Service.
Title
Management Plan for the Big-River Fishes of the Lower Colorado River Basin
USFW Year
2004.
USFW - Doc Type
amendment and supplement to the Bonytail, Humpback chub, Colorado pikeminnow, and Razorback sucker Recovery Plans.
Copyright Material
NO
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<br /> <br />' <br /> LIST OF APPENDICES <br />' <br /> APPENDIX I -SUMMARY OF RECOVERY GOALS FOR BONYTAIL, HUMPBACK <br /> CHUB, RAZORBACK SUCKER, AND COLORADO PIKEMINNOW IN THE LOWER <br />' BASIN <br />' Bon ail <br /> Overview: <br />' 1) Genetic variability is identified and a genetic refuge is maintained over a 5- <br /> yearperiod. <br />' 2) Two self-sustaining populations are maintained over a 5-year period. <br /> Downlisting Criteria: <br /> <br /> 1. Genetic variability of bonytail identified and a genetic refuge (e.g. in Lake <br /> Mohave, Lake Havasu, or other suitable locations) is maintained over a 5-year <br />t period. <br /> 2. Two self-sustaining populations (e.g., mainstem and/or tributaries) are <br />' maintained over 5-year period, starting with the first point estimate acceptable to <br /> the Service, such that for each population: <br />' a. The trend in adult {age 4+; >250 mm TL) point estimates does not <br /> decline significantly, and <br /> b. Mean estimated recruitment of age-3 (150-249 mm TL) naturally <br />' produced fish equals or exceeds mean annual adult mortality, and <br /> c. each point estimate exceeds 4,400 adults (MVP). <br />' Delisting Criteria <br /> <br />' 1. A genetic refuge (e.g., in Lake Mohave, Lake Havasu, or other suitable <br />locations) is maintained over a 3-year period beyond downlisting. <br /> <br /> _. <br /> ~ 46 <br />~ . <br />
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