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autumn period and 3) compare intensive sampling and the concept of habitat uti <br />standardized monitoring to assess ways of refining standardized monitoring and <br />greater use of available data. <br />Backwaters have been recognized as important habitats for YOY Colorado s <br />(Tyus and Haines 1991). Tyus and Karp (1991) considered availability of nurse <br />important to successful recruitment. The Interagency Standardized Monitoring <br />recognizes this by focusing fall sampling for YOY production in backwater habi <br />1987). Backwater habitats are created by sediment deposition or scouring proc <br />run-off flows. In a study of backwater availability and flow regulation, Purc <br />(1989) found that backwater availability increased through the summer as flows <br />gradually decreasing hydrograph was required to maximize availability, but hig <br />may be necessary to establish the proper sediment conditions. They also repor <br />backwaters were much more numerous and larger above Desolation canyon than bel <br />(unpubl. report) reported that river segments with high complexity at the time <br />Colorado squawfish populations. Restricted meanders have the highest numbers <br />Colorado squawfish. <br />Larval Colorado squawfish occupy backwater habitats as a result of passi <br />following swim-up (Tyus 1986). In the Green River, which is the primary produ <br />Colorado squawfish, these drift events concentrate YOY fish in flood plain mea <br />Horseshoe Bend (river kilometer {RK} 450) downstream to Tabyago Canyon (RK 335 <br />RK 160 to RK 50 south of Green River, Utah (Tyus and Haines 1991, Tyus and Kar <br />spite of their initial dependence on drift to encounter favorable habitats, Ty <br />