9720

• 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

6) Establish a breeding program, using a genetic database, to maintain and ensure that the
effective population size of broodstock is adequate to offset the results of genetic drift in small
populations.
7) Establish a genetics monitoring program to assess the long-term genetic integrity of production
fish.
8) Address biological opinion requirements for captive propagation and augmentation.
9) Refine spawning, maintenance, and marking techniques of RBS to ensure genetic longevity of
the stocks.
10) Identify locations, augmentation needs, and current broodstock production capabilities.
Genetic Considerations in RBS Broodstock Management and
Captive Propagation Program
Maintenance of current levels of genetic variation
The overall goal of genetics management of native fishes is to protect natural variation
and patterns of genetic diversity, and to prevent extinction as a result of deleterious changes to the
genome by anthropogenic actions. This plan calls for specific genetics management objectives to
maintain existing levels of genetic diversity of RBS throughout the process of broodstock
maintenance and captive propagation.
Hatcheries, through captive breeding, have prevented the extinction of many species of
imperiled fish. Captive breeding and rearing have enhanced wild populations and prevented
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