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<br />Colorado squawfish in Echo Park of Dinosaur National Monument where juvenile <br />squawfish were abundant in 1968, few in 1969, and none in 1970. However, <br />Holden reported young-of-the-year squawfish in Desolation Canyon in 1971 and in <br />the Green River at Canyonlands National Park in 1970 and 1971. During 1974-76, <br />studies were focused on obtaining further life history information on the <br />Colorado squawfish, humpback chub, bony tail chub, and razorback sucker (McAda <br />1977; Seethaler 1978). McAda (1977) provided new biological information and <br />synthesized all known life history information on the razorback sucker. <br />Seethaler (1978) provided a comprehensive summary of the life history of the <br />Colorado squawfish including the first information on reproduction, fecundity, <br />maturity, and early life development. An annotated bibliography was assembled <br />as a result of these studies that listed all biological studies of the native <br />fishes and macroinvertebrates and provided ample selected references on the <br />economical, political, and sociological factors to provide insight into the <br />complexity of managing this river system (Wydoski et ale 1976, 1980). <br /> <br />Colorado River Fisheries Project <br /> <br />The 1978 amendments of the Endangered Species Act provided that the <br />Service could initiate Section 7 consultation on Federal projects that may <br />jeopardize the continued existence of endangered species or adversely affect <br />their critical habitat. Water development projects in the Colorado River <br />drainage usually have some Federal involvement and, therefore, require Section <br />7 consultation. During the late 1970s, the lack of adequate biological data <br />on the rare fish was recognized by staffs of the Service and the Bureau of <br />Reclamation. This paucity of data inhibited Section 7 consultations to be <br /> <br />11 <br />