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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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A. Task: active pairing of genotyped fish based on interactive database to maintain <br />heterozygosity and all allelic variants present in broodstock. <br />Target date: April 2006 <br />B. Task: monitor production fish and stocked fish annually to ensure no loss of <br />allelic diversity, or no significant change in allelic frequency. <br />Target date: July 2004-July 2008 <br />3) Establish a marking system for all broodstocks to allow identification of each broodfish. <br />Management Action: All broodfish will be pit-tagged. A pedigree database will be <br />established for all broodfish, with a microsatellite genotype of each fish. This database <br />will represent the baseline for broodfish from all facilities. <br />A. Task: Genetic analysis will be performed on all broodfish, beginning with the <br />oldest stocks. <br />Target date: July 2005 <br />B. Task: Paired matings will provide a set of allele frequency expectations of the <br />progeny of each pair based on recorded genotypes. As fish are pooled into <br />populations (ponds for growout), each pond will have a known expected allelic <br />frequency. <br />Target date July 2004-July 2008 <br />C. Task: Fish in grow out ponds will be sampled annually and genetically <br />analyzed to determine if lineage sorting or allelic loss is occurring. If allelic loss is <br />occurring, management plans may be adjusted accordingly. <br />Target date: July 2004-July 2008 <br />33
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