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I I I I I I I I I I I I I I I I I I I Table 8. Number and percent offish collected by seining in the Yampa River, 1999. All Seine Hauls Seine Hauls without Isolated Pools SEVENS DUFFY SEVENS DUFFY SEVENS DUFFY SEVENS DUFFY Number Number % % Number Number % % No. of seine hauls 32 72 28 57 Total 2165 2272 - - 1866 1353 Native Species 6.5% 59% 5.9% 43% Sand Shiner 1241 315 57% 14% 1239 315 66% 23% White Sucker 588 497 27% 22% 491 366 26% 27% Fathead minnow 77 10 3.6% 0.4% 13 2 0.7% 01% Small mouth Bass 9 57 0.4% 2.5% 9 48 05% 3.5% Carp 93 35 4.3% 1.5% I 23 0.1% 1.7% Northern Pike I 14 0.0% 0.6% I 14 01% 1.0% Brook Stickleback 16 9 0.7% 0.4% 0 4 0.0% 0.3% Redside Shiner I I O.O%~ 0.0% I I 0.1% 0.1% Plains Killifish I 0 0.0% 0.0% 0 0 0.0% 0.0% Roundtail Chub 34 773 1.6% 34% 26 243 1.4% 18% Flannelmouth S. 23 23 1. I ~/o 1.0% 12 22 06% 1.6% Speckled Dace 83 538 3.8% 24% 73 315 3.9% 23% Unk (small suckers) 239 113 In order not to conflict with a seining study in progress funded by the recovery program, no fish were seined in backwaters by this study in the 15-mile reach. All backwaters in the IS-Mile reach were seined during the spring (Valdez 1999). HABIT AT COMPOSTION Preliminary analysis of habitat composition were based on habitat typing made subjectively during field surveying, and on partially completed hydraulic modeling that quantified surface area of habitat type possessing combinations of depth and velocity attributes. The quantification of habitat types is still in process but some preliminary results are available and suggest that final results will validate the assumption that fish respond to physical habitat availability. The results given in last years' report indicated riffles and runs were more common at DuffY than at Sevens. At the time of this writing no 2-D results are available for the Sevens stations. 39