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<br />~~ <br />Preface <br />The initial set of criteria and list of sensitive areas was provided to <br />the Upper Colorado River Biological Sub-committee (UCRBS) by Fish and <br />Wildlife biologists. It was subsequently amended by the UCRBS, and other <br />data were applied to make the present list mare c~rehensive. The current <br />list is considered a product of the Sub-cc~mittee. Our goal was to accurately <br />and fairly represent the state of current knowledge and understanding of <br />habitat use by Colorado squawfish, humpback chub and razorback sucker. The <br />focal point of our assessment was the Colorado squawfish. The bonytail was <br />not extensively treated, for lack of data. <br />Based upon the assessment of Fish and Wildlife Service, Colorado <br />Division of Wildlife, and Utah Division of Wildlife Resources data, the <br />sensitive areas represent geographic habitat usage by rare and endangered <br />Colorado River fishes. "Confirmed-use" means that recurring and observable <br />activities have been documented for a particular life state. On the other <br />hand, "suspected-use" only infers that adequate replication or in-depth <br />documentation has not occurred to date. Many "suspected-use" areas could be <br />"confirmed" after additional research. For Endangered Species Act ca~liance <br />under Section 7, suspected-and confirmed-use areas could be considered <br />synonymous. <br />It is hoped that the following sensitive areas will be adopted by <br />management agencies, that the list will remain open to amendment, and that <br />it will form the basis for various basin wide management decisions and plans. <br />The identification and listing of additional sensitive areas should be <br />accomplished whenever enough data is amassed to support their inclusion. The <br />UCRBS recommends additional research to verify suspected areas as soon as <br />possible. <br />Upper Colorado River Biological Sub-ccmmittee <br />November 1984 <br />