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<br />collect because of the rarity of the species. This lack of knowledge - <br />precludes intensive management of river flows and habitat as an im- -~_ <br />mediately applicable measure to ensure survival of razorback sucker in <br />the wild. Introduction of additional razorback sucker in the San Juan ~ <br />River, Utah may have merit as a measure towards ensuring the species <br />survival in the wild. Reintroduced fish should be propogated from any <br />mature adults that can be collected from the river. Also, the BOR <br />collected ripe razorback sucker in the San Juan Arm of Lake Powell at <br />Piute Farms in spring 1987. Fish from that area could also serve as <br />parental stock. Reintroduction efforts would best be conducted in the ~ <br />braided channel area of the San Juan River where backwater habitats <br />form and abundance of predators is low, relative to more downstream <br />reaches and the San Juan Arm of Lake Powell. <br />Based on observations of habitats where Gila spp. are known to <br />occur in the Green and Colorado rivers, no comparable habitats were ~ <br />observed in the San Juan River in 1987, and therefore, no gill or <br />trammel netting was attempted by UDWR. Sampling with entanglement <br />gear in the San Juan Canyon is, however, recommended for 1988. Some <br />areas of the canyon, particularly RMI 74-69 and RMI 52-44, resemble <br />other canyon areas in the Upper Colorado River Basin where Gila spp. <br />have been collected. Gill and trammel netting in 1988 should focus ~ <br />around these areas. <br /> <br /> <br /> <br /> <br /> <br />- 46 - <br />