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Last modified
8/11/2009 11:32:58 AM
Creation date
8/10/2009 5:17:14 PM
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UCREFRP
UCREFRP Catalog Number
9720
Author
U.S. Fish and Wildlife Service.
Title
Razorback sucker (Xyrauchen texanus) genetics management and captive propagation plan, Dexter National Fish Hatchery and Technology Center.
USFW Year
2004.
USFW - Doc Type
Dexter National Fish Hatchery and Technology Center
Copyright Material
NO
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8) Address biological opinion (R2/ES-SE 2-21-95-F-216, 1997) requirements for captive <br />propagation and augmentation. <br />Management Action: Reasonable and Prudent Alternatives provisions require 50,000 <br />RBS over a five-year period to augment populations below Parker Dam. pg 159. <br />A. Task: Continue to produce genetically appropriate progeny for growout at <br />Dexter and other rearing facilities for stocking below Parker Dam. <br />Management Action: "put 50,000 razorback suckers into Lake Mohave by 2000" pg 135. <br />B. Task: Continue to produce genetically appropriate progeny for growout at <br />Dexter and other rearing facilities for stocking in Lake Mohave. <br />Management Action: "proposed action will put 25,000 young fish in Lake Havasu and <br />50,000 into Lake Mohave." pg 154. <br />C. Task: Continue to produce genetically appropriate progeny for growout at <br />Dexter and other rearing facilities for stocking in Lake Mohave and Lake Havasu. <br />Management Action: Objective for Lake Havasu Biological Opinion (1993) is to "release <br />30,000 razorback sucker by 2003" in up to ten native fish rearing coves. pg 3. <br />D. Task: Continue to produce genetically appropriate progeny for growout at <br />Dexter and other rearing facilities for stocking in Lake Havasu. <br />9) Refine spawning, maintenance and marking techniques of the captive stocks to ensure genetic <br />integrity of production fish is maintained. <br />Management Action: Continue to develop, refine and initiate spawning, and marking <br />protocols, and proceed with proceeding research initiatives outlined in previous actions. <br />A. Task: Initiate research project to assess outbreeding and inbreeding depression. <br />Target date: February 2005 <br />37
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