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<br />~ <br />1 <br />] <br />I <br />I <br />J <br /> <br />Seven species were represented by all the fish recaptured during the study (Table 8). Overall <br />direction of movement by tagged fISh included 39% in a downstream direction, 44% moving upstream <br />and 17% exhibiting no movement. Total movements of all species of recaptured fish ranged from <br />zero to 2.3 miles with a pooled mean of approximately 0.3 miles. Net movements ranged from 1.2 <br />miles downstream (negative) to 2.3 miles upstream (positive) with a pooled mean of +0.09 miles for <br />all recaptures. Surrogate species including northern pike and flannelmouth sucker were recaptured <br />48 times. Movements exhibited by these two species were generally equally distributed in an up and <br />downstream direction including 48% (23) in a downstream direction, 42% (20) in an upstream <br />direction and 10% (5) exhibiting no movement. This pattern was reflected in numbers of these <br />species passing over the diversion structure, four downstream and four upstream. <br /> <br />Other native species recaptured included bluehead suckers and mountain whitefish. <br />Approximately 46% of the bluehead suckers recaptured had moved upstream while 23% moved <br />downstream and 31% did not move. This pattern of upstream movement is consistent with <br />observations of three bluehead suckers moving upstream over the diversion structure while none were <br />observed moving downstream. Only two mountain whitefish were recaptured, one downstream and <br />one upstream of their respective release locations. <br /> <br />An~ler Recaptures. A total of eight northern pike, tagged by BIO/WEST were recaptured by <br />anglers during the study (Table 9). Based on descriptions of recapture locations provided by the <br />angler, it was determined that one of the recaptured fish moved over the structure in a downstream <br />direction between April 26 and June 22 at flows in the range of 1440 to 5020 cfs. Of the remaining <br />fish that could be located, based on angler information, two exhibited upstream movements of 0.2 to <br />7.4 m.iles and three moved downstream from 0.1 to 5.8 miles. One angler recapture exhibited no <br />movement. <br /> <br />Table 2. Summary of sampling effort for the City of Craig, Colorado, Yampa River Diversion Fish <br />Passage Study conducted by BIO/WEST in 1992. <br /> <br />No, of Samples (total time) <br /> <br />Trip <br />1 <br /> <br /> Above Below <br />Gear Type' Diversion Diversion Totals <br />EL 14 (3.6 hrs) 22 (3.4 hrs) 36 (7.0 hrs) <br />1R 0 3 (6.6 hrs) 3 (6.6 hrs) <br />EL 14 (4.2 hrs) 18 (4.5 hrs) 32 (8.7 hrs) <br />EL 17 (2.5 hrs) 15 (2.9 hrs) 32 (5.4 hrs) <br />1R 0 4 (6.5 hrs) 4 (6.5 hrs) <br />EL 26 (5.2 hrs) 0 26 (5.2 hrs) <br />1R 0 4 (4.7 hrs) 4 (4.7 hrs) <br /> <br />2 <br />4 <br /> <br />5 <br /> <br />'EL = Electrofishing Jon.boat <br />1R = trammel net 1" interior mesh; 12" exterior mesh, 30, 50 or 75 feet long <br /> <br />9 <br />