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29 <br />Field identification of Gila was difficult. During the past season, <br />dorsal and anal ray counts (Holden et-al. 1974) were relied on to distinguish <br />between G. robusta, G. cypha and G. elegans. In the future, classification <br />of the Gila group will utilize the technique of Smith, Miller and Sable <br />(1979) to hopefully further differentiate the species in this group. <br />Special Investigations <br />To expand upon these rare fishes' life histories requires some very <br />intensive study of specific fish populations and/or 1 ndividual fishes. <br />Only a small beginning was made during the past year to be expanded upon <br />next year. - <br />3 _ <br />During 1979, a broad survey of young-of-year (YOY) squawfish distribution <br />was carried out on the Green River to determine extent of recruitment <br />and general distribution. Also, a limited amount of work was done to <br />examine YOY utilization of backwater areas. <br />One team of workers is concentrating on such studies as young squawfish <br />distribution, diurnal movement patterns, radio tracking to determine <br />behavior and spawning sites, and intensive habitat work on humpback chub <br />populations. <br />Data Analysis <br />Due to the need to initiate field studies immediately, the first year's <br />data were entered on forms developed for field convenience. These data <br />were then transposed to a format suited to computer processing. Since