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1 <br /> <br />PREFACE <br />~~ ~~~ <br />In August of 1995, the Recovery Implementation Program for Endangered Fish <br />Speaes in the Upper Colorado River Basin (Program), acting through the US Fish and <br />Wildlife Service contracting office in Denver, initiated a project with the Center for <br />Limnology, University of Colorado at Boulder (Center) to review and report on the <br />impacts of nonnative fishes on native Colorado River fishes, and to prepare a strategic <br />plan for guiding control of nonnative fish in the upper Colorado River basin (above <br />Lake Powell and excluding the San Juan River basin). The Center was responsible for <br />obtaining information about fish control issues by reviewing pertinent documents <br />produced by the Program, searching the scientific literature, contacting other experts, <br />and by conducting and facilitating discussion at an interagency workshop. The Center <br />had the tasks of evaluating the impact of nonnative fishes on aquatic ecosystems, <br />identifying and discussing the effects of introductions of nonnative fishes on big river <br />fishes of the mainstream Colorado River, and proposing strategies for mitigating the <br />~~ negative impacts of nonnative fishes. This document constitutes a report of findings <br />and a strategic plan for guiding control measures in the Upper Colorado River Basin. <br />The opinions and conclusions stated in this document do not necessarily represent the <br />,~; official position of the Program or those of its cooperating agencies and groups. <br />Additional information about the upper basin recovery program can be obtained <br />by contacting Ms. Connie Young, Public Information Coordinator, or Mr. John Hamill, <br />Program Director, U.S. Fish and Wildlife Service, P.O. Box 25486 Denver Federal <br />Center, Denver Colorado 80225 or at telephone 303-236-2985. <br />i <br />1 <br />1 <br />1 <br />1 <br /> <br />1 <br />