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205. Kobetich, G. C., and P. B. Holden. 1976. The ENDANG. FISH <br />rare fishes of the Colorado River basin. HISTORY <br />Paper presented Western Division Meeting, COLORADO R. <br />American Fisheries Society, July 1976, Sun 1, 2, 3, 4 <br />Valley, Idaho. <br />Paper summarizes present knowledge on the rare <br />fishes of the Colorado River basin. It includes <br />reasons for decline and the recovery efforts <br />underway. Consideration was given to 20 species <br />of the fish, including the Colorado squawfish, <br />bonytail chub, humpback chub and razorback <br />sucker. Paper presents a hypothesis concerning <br />the events leading to the hybridization of Gila <br />cypha with other chubs, indicating the hybridi- <br />zation occured before man-made alterations. <br />206. Koster, W. J. 1957. Guide to the fishes of SPECIES LIST <br />New Mexico. University of New Mexico LIFE HISTORY <br />Press, Albuquerque. 116 pp. DESCRIPTION <br />DISTRIBUTION <br />Eighty-five species representing 16 families <br />both native and introduced are discussed in the <br />book. The book is designed for the fisherman <br />and gives basic descriptions, distributions, <br />habits, notes on edibility and relationships to <br />other fish. Line drawings aid in identification. <br />A brief glossary is included. <br />207. Koster, W. J. 1960. Ptychocheilus lucius ENDANG. FISH <br />(Cyprinidae) in the San Juan River, New DISTRIBUTION <br />Mexico. Southwest Naturalist 5(3):174- DESCRIPTION <br />175. SAN JUAN R. <br />3 <br />The presence of Ptychocheilus lucius (Girard) <br />in northwestern New Mexico has been confirmed. <br />Two specimens were captured from the San Juan <br />portion of the Colorado River basin. This <br />paper gives an account of where they were <br />captured and a description of the specimens. <br />208. LaRue, C. E. 1916. Colorado River and its <br />tributaries. U. S. Geological Survey <br />Water Supply Papers No. 395. 231 pp. <br />This is one of the best historic accounts of <br />flow and water quality on the Colorado River. <br />A historic sketch of exploration and use of the <br />river is provided with specific information of <br />HISTORY <br />FLOW <br />WATER QUAL. <br />HYDROLOGY <br />GREEN R. <br />YAMPA R. <br />GUNNISON R. <br />SAN JUAN R. <br />u~ <br />