ABSTRACT-Theef fect of Taylor Draw Dam on the movementsa nd distributiono f flannelmouth suckers( Catostomulsa tipinnis)i n the White River, Colorado,w as investigatedd uring 1983 to 1985. During this period, 198 fish of 3,391 fish tagged were recaptured. Recapture data collected during the summers of 1983 and 1984 were used to determine movement while the river was still free-flowing and then compared to the recapture information gathered in 1985, after impoundment. Before completion of the dam, in most areas, the local population of flannelmouth suckers was mobile rather than sedentary, and movements were random (non-directed). Fish 300 to 400 mm in total length moved more than larger fish. Larger sexually mature fish appeared to [...]