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<br />, <br /> <br />. <br /> <br />y}1 i r1 ckl ~v <br />I <br /> <br /><?J55 <br /> <br />\~~S <br /> <br />8<ECUTI'-JE SUt.1t1ARY <br /> <br />- <br /> <br />Natural aquatic habitats are becoming scarce in the arid American <br />Southwest due to man's expanding needs for water. Native fishes are in <br />direct competition for this resource, and are rapidly losing in their <br />struggle for existance. <br /> <br />Judicious husbandry of existing habitats, reclamation of those which <br />remain relatively natural, and an intensive program of management of native <br />fishes can stop and reverse current trends toward faunal extinction. <br />Recommendations are to treat these fishes as faunal complexes, and define, <br />delineate, and acquire for management those habitats with attributes <br />suitable to support groups of species in perpetuity. Already-protected and <br />geographically remote habitats are of top priority, those used by man but <br />sti 11 in a natural or semi-natural state are second, and others requiring <br />increasing levels of reclamation are decreasingly emphasized. Big rivers <br />and their fishes are most critically endangered, streams and fish species <br />of intermediate and high elevations are least so, and special habitats and <br />fishes are manageable through site acquisition and reintroduction programs. <br /> <br />There is not sufficient time for in-depth research prior to actions to <br />recover many of the imperiled species and populations. Collection of basic <br />information on reproduction, species interactions, and population <br />dispersion and dispersal, must occur concurrently with habitat and species <br />recovery and management operations. Production and dissemination of <br />carefully prepared reports will be necessary during the same time period so <br />that appl ication of new information can maximize successes of the program. <br /> <br />Recommended Citation: <br /> <br />NINCKLEY, W. L. 1985. Native fishes and natural aauatic habitats in U. S. <br />Fish and Wildl ife Service Recion II west of the Continental Divide. Report <br />to the U. S. Fish and Wildl ife Service, Albuquerque, New Mexico. Deparment <br />of Zoology, Arizona State University, Tempe, Arizona. Pp. ix + 158, <br />processed. <br />