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DFC PROCEEDINGS - ALPHABETICAL LISTING OF ABSTRACTS BYERS, S.*; WERDON, S. J.; WITHERS, D. L. (Nevada Smote Office. U.S. Fish nd Wildlife Servloe. Reno. NV) Fish species of special concern in northern Nevada KEYWORDS: Special concern; native fish; status; Nevada ABSTRACT Of the 34 native fish species of special concern in Nevada, 15 occur in the unique habitats of northern regions of the state. Included are one sucker, two chub, six tui chub, 1 cutthroat trout, two redband trout, bull trout, relict dace, and one speckled dace. Ten of these fishes are each restricted to only one valley. Unlike many of the species of special concern in southern Nevada, these fish species occur in non-thermal waters. Little is known about the current status of these fishes. RESUMEN De las 34 especies de peces nativos de interes especial en Nevada, 15 ocurren en habitats 6nicos de las regiones nortenas del Estado. Se induyen: un sucker, dos chub, seis tiu chub, un cutthroat trout, dos redband trouts, bull trout, relict dace, y un speckled dace. Diez de estos peces estan restringidos 6nicamente a un valle. A diferencia de muchas de las especies de interes especial que ocurren en el Sur de Nevada, estas especies de peces ocurren en aguas no termales. Poco se conoce acerca del estatus actual de esters especies. CARMICHAEL, G. J.*; JENSEN, B. L.; WILLIAMSON, J. H. (GJC.South ...Fbhee.T-h-d-uc--MmNFH&Tc U. S. Fish and Wftdlife Service. Mm. NM; BLJ a`d JHW - Soudh taa Fiahain Tedmdogy Centa - Dear NFH&TC. U. S. Fish and Wildlife Serv=e. Dana. NM) Production and translocation of fishes: hazards and risks assessed and addressed? KEYWORDS: Translocation; production; hazards; risks; hatcheries ABSTRACT "Translocation" is yet another way to communicate the idea of moving fish from one place to another. Generally, translocation implies direct location to location transfer, although transfer from location to hatchery to location is sometimes included. Hazards and risks, real and theorized, have been identified in production and translocation of fishes, especially when hatcheries and threatened or endangered fishes are involved. Potential genetic hazards associated with traditional hatchery production methods include population extinction, loss of genetic variation within and among populations, and domestication selection. Identification of these potential hazards on hatcheries and their perceived risks has caused concern within the conservation community. Consequently, hatchery propagation and reintroduction using hatchery fish has become less popular as a management tool for recovery purposes. Skepticism remains in spite of successful efforts to remove hazards and minimize risks through systematic implementation of modern fish culture practices. The response of some conservation managers has been to discard hatcheries as a tool and focus on direct location to location transfers. Weak on supporting evolutionary theory and concepts, these "alternative" management efforts may actually increase the risk of genetic hazards to the target populations beyond that of more controlled management methods. On the other hand, fish spawned and reared under controlled conditions can provide, in some instances, product quality superior to that provided by alternative methodologies. New production methods are also being investigated to address concerns regarding environmental effects on fish physiology and behavior. Examples will be presented to encourage a more systematic approach to hazard evaluation and risk reduction in management plans and activities. RESUMEN "Traslocaci6n" es tambien otra manera de comunicar la idea de mover un pez de un lugar a otro. Generalmente, traslocaci6n implica moviemient de una locaci6n directs a otra, sin embargo transferir de 26 V