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in the Green River basin (Tyus and Karp, In Press) suggests that imprinting and home site -selection may be also be important considerations in the recovery of this fish. STUDY METHODS AND APPROACH: "~ Because of the time re aired to do this work and the critics] need to demonstrate progress towards recovery of endangered Colorado River fishes, we plan to conduct basic ecological studies concurrently with developing recovery and management options. This would best serve the needs of the Recovery Implementation Program with respect to efficiency, time]iness, and cost. It is presumed that studies be designed and implemented with the combined efforts of Federal and State agencies, university researchers, and others. We propose that the authors constitute a steering group for implementing the program. An advisory work group would consist of the following: (1) a representative from each of the non-game divisions of state wildlife conservation agencies from Arizona, Colorado, Utah, and New Mexico; (2) one representative from the Bureau of Reclamation; (3) one representative from the Western Area Power Administration; (4) an expert on artificial imprinting (A.T. Scholz); (5) an expert on chemosensory cues from reproductive by- products (N.R. Foster); and (6) a representative from the Technical Group, Recovery Implementation Program. In addition, administrative and c]erical support would be necessary, and this would presumably be available from the Fish and Wildlife Service. Study initiatives and priorities would be developed jointly by the steering and advisory groups. It would then be incumbent on the steering group to implement annual work agendas by the most prudent and feasible means. Studies would presumably consist of laboratory and field activities, of which laboratory work would be solicited from competent researchers at large. Field studies would be conducted primarily by state and federal agencies. Colorado squawfish Work on Colorado squawfish would be primarily field-oriented, and directed toward evaluation and protection of some stocks, and augmentation of others. Recovery of Colorado squawfish may re uire rovision of new spawning.~habitats in someareas and reestablishmen of populations in areas where it_is ~ os~or greatly diminished. Population augmentation or reintroduction may fail unless the reproductive behavior associated with the location of suitable spawning and nursery sites is understood. --- - - --- Information about reproductive ecology of Colorado squawfish in the Green and Yampa rivers was used to outline studies evaluating olfaction and imprinting as a means for recovering or re-establishing populations of the fish. Further development of such studies would be accomplished jointly with. assistance from knowledgeable researchers. A principal investigator has been identified to guide each major study section, and field personnel suggested naucting the work. Locations selected for performing the work were 5