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. 28 . caught, respectively. The fish were anal fin clipped during! the first four samples and one recapture was found in each of the last three sam- ples. Marked fish were not recovered in other areas near th~ test site although an extensive seining effort was made to locate them. Fry traps were not used because the young-of-the-year squawfish were large enough to be more efficiently sampled with seines. One bony tail chub adult and one juvenile were tagged bu~ not recaptured during the study. Fourteen adult and 9 juvenile chubs from Desolation and Gray canyons were also tagged but none were recaptured. . . . Fishes Associated with the Rare Species . Table 3 summarizes the fishes,by size class, found in !seine samples containing rare species. These data give a preliminary view of potential competition between species. Young introduced species were .found more often than native fishes in samples containing rare species. Red shiners, more than any other species, were found in the same samples ias rare fishes. The data i.n Table 3 indicate that young-of-the-year Col!orado squawfish were found most commonly with red shiners, fathea~ minnows, juvenile carp, and young-of-the-year channel catfish. Juvenile squawfish were found most often with red shiners, juvenile roundtail qhub, and young-of-the-year flannelmouuh and bluehead suckers. Young-of-the-year and juvenile humpback chubs were fourid most commonly with red shiners, fathead minnows, and young-of-the-year channel catfish. Adult humpback chubs were found most commonly with red shiners and juvenile humpback chubs. . . . . .