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I I I I I I I I I I I I I I I I I I I portion of the Colorado River. Adult squawfish utilize a variety of habitat, especially deeper runs along shorel ines year-round and large backwaters during runoff (Holden and Wick 1982). They are often con- centrated in flooded gravel pits near Grand Junction during runoff. Small er juvenil es and young-of-the-year prefer backwater habitat with a silt or sand bottom. A suspected spawning site was located in 1982 near Cl if ton , just upstream from Grand Junction (Miller et al 1983) This site was found through tracking of radio-tagged adults and coll ection of adults in spawning condition. A larval squawfish was also found in the area. Radio tagged squawfish in 1983 did not home into the 1982 suspected spawning site, but showed behavior that may have indicated spawning in several sites (Miller et al 1984). The most probable site of spawning, based on collection of larval squawfish, was near Black Rocks, a deep canyon area dO\-mstream from Grand Junction (Figure 2) (Miller et al 1984), although 1 arval squawfi sh were again found in the upstream areas near the confluence of the Gunnison River (Archer et al 1984). There- fore, several spawning sites between Black Rocks and Clifton may exist, as well as others below Black Rocks. In the Green River system, two well defined spawning areas have been identified (Archer et al 1984). One is on the lower Yampa River, the other is on the middl e Green River where Desol ation Canyon and Grey Canyon join. Both areas are cobbl e bottomed areas with areas of swift current and deep, slower pools. The Grey Canyon site is in a major rapid. Although not noted in the FWS reports (Miller et al 1984, and Archer et al 1984)~ larvel squawfish have been collected above the Yampa River spawning site by Colorado Division of Wildlife (CDOW) biologists - 21 -