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Juan rivers; Niland-Imperial Valley Hatchery, California; Page Springs SFH, Arizona; Buenos <br />Aires, Cibola, Imperial, Havasu National Wildlife Refuges; and the Colorado River Fisheries <br />Project (CRFP) at Vernal, Utah. <br />The second broodstock will be referred to as the Paired Matings (PM) broodstock. This <br />stock, comprised of approximately 90 unique family groups is the product of paired matings of <br />wild caught adults spawned at Willow Beach NFH from 1994 to 2003. Those efforts resulted in <br />1,200 fish currently held as PM future broodstock at Dexter NFHTC (Table 2). <br />A third broodstock has been developed at Dexter NFHTC, and consists of six year classes <br />of juvenile wild-caught fish from Lake Mohave. These fish were captured as fry from eight <br />locations throughout Lake Mohave and given the designation of Wild Caught (WC) future <br />broodstock <br />(Table 2). <br />The breeding program at Willow Beach NFH incorporates the rearing of wild caught <br />larvae from Lake Mohave, and paired mating of adults collected during the annual RBS roundup. <br />Offspring from paired matings are shipped to Dexter NFHTC for growout and incorporation into <br />the PM future broodstock. Wild caught larvae collected by the Lake Mohave Native Fishes <br />Cooperative Work Group are reared at Willow Beach NFH, Dexter NFHTC, and Bubbling Ponds <br />SFH to 300 mm, PIT tagged, and released back into Lake Mohave. Larval fish collections are <br />scheduled to continue for several years while repatriated fish survival and adult population <br />estimates are calculated. On an annual basis, Willow Beach NFH maintains five year classes of <br />wild caught fish (Table 2). These fish also serve as a potential broodstock source of Lake <br />Mohave origin. <br />14