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most shad. In geomorphically dendritic Lake Powell there is a vast distance between forage concentrations in the backs of coves and canyons. with close to 3000 km of shoreline some areas can harbor an unmolested shad population for a short time. Shad peaks in 1991 and 1995 created a lakewide open water shad population with dense numbers close to the tributaries. Striped bass moved to areas of greatest forage density near the tributaries and stayed at those locations rather than migrating downlake in fall. During spring 1992 virtually no striped bass moved to the dam in the spring prespawning period. Apparently forage availability in the upper lake overcame the urge to move downlake. However, by fall 1992, with forage depleted uplake, there was a major downlake migration evidenced by excellent fishing near the dam during winter 1992 and spring 1993. The same movement occurred in 1995-1996 with two years of high forage concentrations particularly in the upper lake near the tributaries. striped bass held in the upper lake with no fall movement and no corresponding spring striped bass fishery in the lower lake. But just as occurred in fall 1992, striped bass migrated downlake in fall 1997 after shad numbers declined. Lower lake shad that were not utilized during 1991, 1995 and 1996 were discovered by striped bass the next year and those population were then exploited. Shad are not able to elude striped bass who move constantly in search of food and stay in an area until shad are gone, except in warm turbid shallow water in the extreme backs of the canyons. SPORT FISHERY The original striped bass stocked in 1974 did not contribute to the sport fishery until 1979 when 3% of all fish caught in Lake Powell were striped bass. Between 1980 and 1988 striped bass accounted for a significant proportion of all fish caught, peaking at 64% of total harvest in 1985 (Table 7). In the 1991 33