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21 n9 the summer. The only habitat where adults consistently en- laged in random swimming during the summer was in the largest '001 s and back eddies. Adul ts were found random swimming in many !ools- and back e"ddies during winter. Thus, random swimmi n9 ;- dul ts occupied a greater mean water depth during summer than ur; ng wi nter. ish velocity Stationary swimming. Increased flows produced increases in ish velocity for all life stages during the activity of station- ry swimming in winter (Table 2). Flow increases from medium to igh during summer usually produced increases in fish velocity. he average fish velocity for juvenile rainbow trout decreased lightly from medium to high flows during summer, but the change as not significant (P > 0.05). Fish velocity increased only lightly from low to high flows for juvenile cutthroat trout in he summer. This can be explained by the fact that the juvenile Jtthroat trout occupied relatively quiet areas near shore ., hroughout the summer ,resul ti n9 from their small size. Adults of both species generally were observed in higher 21 oci ties than juvenil es. This was most obvious during the Jmmer when the si ze differences between the 1 i fe stages were "ea te st. For all flows combined, adults of both species were Jund in significantly (P < 0.05) higher velocities than juven- les during the summer and during the winter for rainbow trout. nere_ was no si 9nifi cant (P > U. 05) differences in vel oc i ti es , " :tween adult and juvenile cutthroat trout during the winter.