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<br />2007 (Table 1). <br /> <br />Our capture efficiency, measured by removal rate, was 40 to 64% of the point estimate <br />at Little Yampa Canyon. Our highest removal rate was in 2007 when we had many <br />removal occasions (n = 7) and removed fish from the entire 24-mile reach (Table 4). <br />Capture probability was moderately good at 8% that year (Table 3). Removal rates of <br />40% and 41 %, in 2004 and 2005, respectively, for the 24-mile reach were low but <br />actually very good considering that fish were only removed from 50% of the reach from <br />which we determined abundance. We removed 48% of the estimated abundance of <br />smallmouth bass in 2005. Removal rate was low in 2006 due to few removal <br />occasions. Recapture rate, the percent of tagged fish recaptured, ranged 31-47% and <br />in most years was lower than removal rate (Table 4). <br /> <br />At Little Yampa Canyon, small mouth bass ranged from 22 to 495 mm, average length <br />of adult bass was 272 mm (SO = 77) and their average weight was 463 grams. Large <br />adults (~250 mm) comprised from 32 to 50% of the size structure of the smallmouth <br />bass community at Little Yampa Canyon each year (Figure 4). <br /> <br />Of the 8,883 smallmouth bass removed from Little Yampa Canyon 3,848 (1,558 kg) <br />were translocated. More smallmouth bass (n =1,480) were translocated in 2004 than in <br />any other year because bass of all sizes were translocated in that year; in other years, <br />only bass ~250 mm TL were translocated and their numbers ranged from 240 to 792 <br />fish per year (Table 5). We removed seven other nonnative species besides <br />smallmouth bass from Little Yampa Canyon, including 250 black crappie, 172 bluegill, <br />111 black bullhead, 66 green sunfish, four pumpkinseed, and one largemouth bass <br />(Table 6). We also removed and northern pike which were reported in Martin and <br />Wright (2008). Many of the centrarchid species were most abundant in 2005 and 2006 <br />after the temporary construction screen at Elkhead Reservoir failed during runoff. <br /> <br />At Lily Park, 6,307 smallmouth bass (518 kg) were removed from the river with boat <br /> <br />13 <br />