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Although endemic species were not found in bass stomachs, adult Colorado <br />squawfish and razorback sucker were captured along with striped bass near <br />Gypsum Canyon. A small (163-mm total length) squawfish was captured during <br />June with an electrofishing boat near Gypsum Canyon (Mike Ottenbacher, Utah <br />Fishery Biologist, personal communication, 1980). Four other small squawfish <br />(72, 106, 67 and 106 mm) were captured July 17-18 near Imperial Canyon (river <br />mile 200) and during this time 5 adult striped bass were captured near Gypsum <br />Canyon (river mile 197.5) (Mike Ottenbacher, Utah Fishery Biologist, personal <br />communication, 1980). <br />No striped bass spawners were captured above the rapids in Cataract <br />Canyon although sampling effort there lasted only two weeks. Cool water <br />temperatures from snow melt in the watershed appeared to be a more logical <br />explanation for lack of upriver movement rather than presence of the rapids. <br />Striped bass are known to spawn in the rapid sections of certain rivers such <br />as the Roanoke River in North Carolina (Jones et al. 1978). Netting was not <br />conducted above Cataract Canyon in June when water temperature entered the <br />range where spawning occurs.