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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Table 2. Species composition for fish Over and Under 15 cm caught in the Yampa River in <br />September, October 2000. <br /> <br /> LILY SEVENS DUFFY LILY SEVENS DUFFY <br /> PARK PARK <br /> 2000 2000 2000 2000 2000 2000 <br />Species >lScm > 15cm >15cm <15cm <lScm <15cm <br />Flannelmouth Sucker 47.8% 49.8% 5.0% 0.22% <br />B\uehead Sucker %.5% 22.2% 3.5% 1.7% <br />Roundtail Chub 002% 3.8% 3.6% <br />Colo. Pikeminnow 0.07% 0.2% 0.8% <br />White sucker 0.15% 10.6% 23.0% <br />White X Flannclmouth 0.12% 6.0% 40.5% <br />White X Bluchead 0% 0.4% 9.0% <br />White S. + Crosses 0.27% 17.0% 72.5% 0.6% 25.9% 5.8% <br />Channel Catfish 40.2% 1.9% 3.2% <br />Carp 2.1% 3.8% 0.8% 0.6% 0.6% <br />Smallmouth Bass 0.8% 0.5% 9.6% 79.9% 14.3% 83.5% <br />Northern Pike 0.2% 0.2% 0.9% <br />White Crappie 0% 0.1% 0% <br />Mottled Scuplin 10.3% 4.7% <br />Speckled Dace 1.7% 2.4% 1.2% <br />Sand Shiner 5.2% 56.9% 1.3% <br />Fathead Minnow 0.22% <br />Creek Chub 2.7% <br />Green Sunfish 0.3% <br />Sample size 4058 1110 1294 174 455 937 <br />Recaptures 324 93 250 <br /> <br />Table 3. Species composition for fish> 15 cm by electro-fishing pass at Lily Park, 2000. <br /> <br /> First Second Third Fourth <br />Flannelmouth sucker 74% 32% 50% 44% <br />Bluehead sucker 2% 9% 11% 9% <br />Channel catfish 21% 55% 36% 43% <br />Sample size (n) 706 1057 1121 1174 <br /> <br />The very low base flows in the Yampa River in 2000 (Figure 2) appear to be the main <br /> <br />factor explaining the variable species composition at Lily Park. At 70 cfs fish occupancy was <br /> <br />restricted mostly to deep pool habitats, but with increased flow there was also increased <br /> <br />23 <br />