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<br />populations were prioritized as follows (the Grand Canyon population was not considered in the <br />plan): <br /> <br />Priority Population - Reason <br />I Desolation-Gray Canyon - because of small numbers offish, morphological <br /> variation, and remoteness in the upper basin. <br />2 Yampa Canyon - because it is located in the relatively unaltered Yampa River. <br /> Concern of nonnative fish predation impacting this population is currently under <br /> investigation. <br />3 Cataract Canyon - because the phenotypes indicate the population is not as variable <br /> as the Yampa River and Desolation-Gray Canyon population and is less likely to be <br /> impacted from human activities. <br />4 Black Rocks - because the phenotypes indicate a pure humpback chub population. <br /> Westwater Canyon - because the phenotypes appear to be pure humpback chubs like <br /> the Black Rocks Canyon population. Black Rocks and Westwater Canyon <br /> populations were considered relatively large and stable and assigned the lowest <br /> priori !y. <br /> <br />SERVICE POLlCY ON CAPTIVE PROPAGATION <br /> <br />A joint policy with U.S Fisha and Wildlife Service and National Maine Fisheries Service <br />regarding controlled propagation of species (U. S Oftice of Federal Register 65: 183 [2000]: <br />56916-56922) "addresses the role of controlled propagation in the conservation and recovery of <br />species listed as endangered or threatened under the Endangered Species Act of 1973 (as <br />amended) (Act). The policy provides guidance and establishes consistency for use of controlled <br />propagation as a component ofa listed species recovery strategy. This policy will help to ensure <br />smooth transitions between various phases of conservation efforts such as propagation, <br />reintroduction and monitoring, and foster efficient use of available fimds. The policy supports <br />the controlled propagation of listed species when recommended in an approved recovery plan or <br />when necessary to prevent extinction of a species. Appropriate uses of controlled propagation <br />include supporting recovery related research, maintaining refuge populations, providing plants or <br />animals for reintroduction or augmentation of existing populations, and conserving species or <br />populations at risk of imminent extinction or extirpation." <br /> <br />DRAFT HBC Genetics Management Plan - 4 <br /> <br />OOG50 <br />