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identification of sp~wning requirements, habitat requirements of young and adults, migratory behavior, interspecific competition, predation and food habits, effects of temperature, salinity, and chemicals, devel~pment of cultural techniques,- disease and pa~asite diagnostics, ar:ld taxonomy (Miller et ~. 1982a). Field work from 1979 to 1981 emphasized sampling the upper Colorado River from lake Powell to Rifle, Colorado (Valdez et ~. 1982a), and Green River from its confluence with the Colorado upstream to Split Mountain Gorge (Tyus et ~. 1982b), to determine distribution, relative abundance, -- mnvements, and habitats of various life stages. The 1979 MOU was amended in 1981 to include an investigation of the humpback chub in the little Colorado River, Arizona (Kaeding and Zimmerman 1983), and to expand field studies in the upper basin to include the Dolores and Gunnison rivers, Colorado-Utah (Valdez et ~. 1982b). Additional funds provided by the U.S. Bureau of land Management incluaing studies of trre fishes in the White River, Colorado-Utah (Miller et ~. 1982b). In addition, Congress and the U.S. National Park Service (USNPS) supported field research on the Yampa and Green rivers in DNM (Miller et ~. 1982c). Funding provided through the Windy Gap Process (see previous discussion) was used for a three- year habitat use and radiotelemetry study of Colorado squawfish and humpback chub on the upper Colorado River, and to investigate use of "nonflow, alternatives" (habitat development, fish passage, and stocking} as means of maintaining and ensuring recovery of the endangered fishes (Archer et ~. 1985). laboratory research for Colorado squawfish outlined in the MOU included swimming stamina, bioassays of potentially toxic trace elements, tolerances and preferences to temperature and total dissolved solids. In addition, various contracted studies examined physico-chemical habitat conditions in