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PREFACE The upper Colorado River system has become the focus of much concern. The presence of threatened and endangered species and their endemic status coupled with a manifest pressure to reduce the already over-allocated water resources for additional agricultural, domestic, mining, industrial uses, and for the development of .some of the largest fuel deposits (coal, oil, oil shale, uranium) in the United States has produced a situation of potential conflict between develop- ment and environmental maintenance. There exists today a significant amount of information concerning many aspects of the upper Colorado River ecosystem. This large basin encompasses more than 109,000 square miles and has a unique resident fish population, for more than two thirds of the native fish are endemic. This bibliography represents Part 1 of a more comprehensive three-part study of the status, life history, and habitat require- ments of endangered and threatened fishes of the upper Colorado River system. The complete report consists of the following: Part 1 - An Indexed, Annotated Bibliography of the Endangered and Threatened Fishes of the Upper Colorado River System. Part 2 - An evaluation of the Status, Life History, and Habitat Requirements of the Endangered and Threatened Fishes of the Upper Colorado River System Part 3 - Detailed Distribution Maps, keyed to the literature, of the Endangered and Threatened Fishes of the Upper Colorado River System Major emphasis of this bibliography lies with the threatened and endangered fishes of the upper Colorado River system: their limiting factors, habitat alteration, and the numerous environmental factors associated with them. Subjects such as archaeology, economics, and sociology of the upper basin are not included for they represent an indirect relationship with the fishes. The bibliography is fully annotated, indexed, and alphabetically listed by author. Each entry is cross referenced by species, river or 2