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characterized by location when environmental cues trigger spawning. Spawning can virtually occur anywhere in Lake Powell. The only constant is that relative abundance of yoy is greatest near the inflow and near the dam with fewer yoy found in the mid portions of the lake indicating that striped bass move towards current in the spring. Prespawning aggregations of striped bass were not detected at Glen Canyon Dam during spring 1996 probably in response to high forage availability in the upper lake during the preceding 18 months. An abundant year-class was produced despite spawning activity being noticeably absent from historically important spawning areas near the dam. Tagging Study Striped bass tagged in the early 1980's provided evidence of the nomadic tendencies of the Lake Powell population. From 1981- 1987 some 641 striped bass were tagged with Floy anchor (N=394) or cinch-up (N=247) type tags. Tag return was completely voluntary with no reward or other means to entice anglers to submit tags. Some 32 tags (5%) have been returned with the last return in May 1987. Average duration between tagging and return was 10.75 months. The quickest return was 6 days while the longest known tag retention time was 42 months (Table 6). Average distance traveled between tagging and recapture was 29.4 miles. FiSh tagged from the same school or cohort often exhibited quite different behavior. Fish tagged in the fall, on the same day in Padre Bay (#34,121,123,193), returned the next spring near the prespawning staging area near the dam. One fish (#121) from the group moved uplake indicating that while most fish were drawn to the dam in the spring, some individuals moved to different locations. Of two fish tagged in Red Canyon in November 1982 (#1289, #1296), one moved to Cedar Canyon. The other fish was recaptured one year later at the same tagging location, but probably after 30