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vii Results There were seasonal differences in distribution of fish. In the winter, fish were concentrated in the quiet water of pools. The juve~iles especially were found in this habitat. The primary activity in pool habitat was random swimming. Fish were distri- buted three dimensionally from each other. There was little in- dication of territorial behavior. During the summer fish were usually located in shallower and faster water. The primary ac- tivity in the summer was stationary swimming. Fish were distri- buted in a horizontal plane and established stations or territo- ries were evident. The average water velocity occupied by the fish ranged from .:: 12 to 41 cm/see for the activity of stationary swimming and from 7 to 21 cm/see for the activity of random swimming. Increased flow releases usually resulted in fish occupying higher velocity water during the activity of stationary swimming. For the activ- ity of random swimming, increased flow releases did not consis- .. tently result in increased fish velocities. For the activity of stationary swimming, fish occupied deeper water during the winter than in summer. Random swimming occurred primarily in pools, and seasonal differences in water depth used by the fish were not usually as great for this activi- ty. Fish depth (distance of the fish from the bottom) was usual- ly greater in winter than in summer. Fish were usually located in the lower one-third of the water column regardless of season "~~~,j~a,~;:~;...",,"1 .'~~.+-,;;",~,~~~~~~.~~~I_~ _ .J.Jl~ ~...," ~,,;;;;'^' ~.~ -. '. ."",;~,.,'<-<:.."~ "li-"""-"~p-,..", ,~~,c'gn,~ ~