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<br /> <br />lJG2459 <br /> <br />PREFACE <br /> <br />In August of 1995, the Recovery Implementation Program for Endangered Fish <br />Species in the Upper Colorado River Basin, acting through the US Fish and Wildlife <br />Service contracting office in Denver, initiated a project with the Center for Limnology, <br />University of Colorado at Boulder (Center) to review and report on the impacts of <br />nonnative fishes on native Colorado River fishes, and to prepare a strategic plan for <br />guiding control of nonnative fish in the upper Colorado River basin, The Center was <br />responsible for obtaining information about fish control issues by reviewing pertinent <br />documents produced by the Program, searching the scientific literature, contacting <br />other experts, and by conducting and facilitating discussion at an interagency <br />workshop. The Center had the tasks of evaluating the impact of nonnative fishes on <br />aquatic ecosystems, identifying and discussing the positive and negative affects of <br />introductions of nonnative fishes on big river fishes of the mainstream Colorado River, <br />and proposing a strategy for mitigating the negative impacts of nonnative fishes. This <br />document constitutes a report of findings and a strategic plan for guiding control <br />measures in the Upper Colorado River Basin. The opinions and conclusions stated in <br />this document do not necessarily represent the official position of the upper Colorado <br />River recovery program or those of its cooperating agencies and groups. <br /> <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 /> <br />ii <br />