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<br /> <br />' INTRODUCTION <br /> The Lower Colorado River Basin Management Plan (LCRMP) identifies <br />' strategies necessary to achieve the Recovery-Goals (USFWS 2002a, b, d) for <br /> the federally endangered bonytail (Gila elegans), humpback chub (G. cypha), <br /> and razorback sucker (Xyrauchen texanus) in the lower basin. There are <br /> <br />' currently no Recovery Goals outlined for Colorado pikeminnow (Ptychocheilus <br /> lucius) in the lower basin; however, we do address the provisional recovery goals <br /> for this species for the lower basin (2002c). These species are collectively known <br />' as the "big-river fishes." The pertinent Recovery Goals are listed in Appendix I. <br />The LCRMP identifies management strategies at the programmatic level. It is not <br />' intended to provide the level of detail needed to implement specific actions under <br /> the management strategies. Implementation of the LCRMP will be guided <br /> through the voluntary efforts of Federal and State agencies and interested <br />' Tribes, local groups and private cooperators. When a specific action is proposed <br /> for implementation, a comprehensive planning process will involve cooperating <br /> agencies, interested stakeholders and resource groups to design the proposed <br />' action to meet the needs of the LCRMP and avoid effects to significant <br /> environmental resources. <br />' This document was prepared by the Recovery Implementation <br /> Planning/Scientific Work Group, a team appointed in 1999 by the Regional <br /> Director of the U.S. Fish and Wildlife Service (Service), Region 2. It is currently <br />' comprised of personnel from Arizona Game and Fish Department (AGFD), <br /> California Department of Fish and Game (CDFG), Nevada Department of <br /> Wildlife (NDOW), U.S. Bureau of Reclamation (USBR), Arizona State University <br />' (ASU), U.S. Geological Survey (USGS), the Service, and the University of <br /> Nevada, Las Vegas (UNLV). <br /> COLORADO RIVER BASIN <br />The entire Colorado River basin drains -x650,000 km2 of western North America <br />(Carlson and Carlson 1982; Carlson and Muth 1989). The basin is divided for <br />administrative purposes into the upper and lower basins at Lees Ferry, Arizona. <br />' The lower basin consists of portions of Arizona, California, and Nevada and <br />includes the mainstem Colorado River and its tributaries, from Lees Ferry to the <br /> <br /> <br />