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winter ice~on period from November through March, pike tended to remain in a specific RM location in a specific habitat type, often in the same pool in which they were initially captured (Table 5). Nineteen of the radio-tagged pike demonstrated this characteristic during the baseflow and winter ice-on seasons. In 76% of all observations, tagged pike had moved an average of only 0.15 miles from their previous location (range 0.0-0.7 mi). During winter observations of these fish, though, they were often quite active, moving around within the pool or backwater. Observations of changes in RM location occurred primarily in the spring following ice-off, or sometime between the fall base flow period and ice-on. Spring movement ranged from 0.9-26.1 miles and averaged 4.4 miles. In the Maybell reach (RM 58-90), one pike moved downstream almost 5 miles from a backwater/pool at RM 81.1 to another major pool at RM 76.2 between March 4 and September 23, 1987, returned to the original upstream backwater/pool by November 17, 1987, and then moved 7.1 miles further upstream to the Lay Cr. confluence by April 8, 1988. Another pike remained at RM 80.8-81.1 throughout the October 1986 to March 1987 period, then was recaptured by an angler 7 miles upstream at the Lay Creek. confluence in May 1987. A third pike remained at a pool under the Maybe11 bridge at RM 79.3 from August 1987 through March 1987, then was relocated 26 miles downstream in May 1987 in the Lilly Park reach. Two other pike radio tagged in the Lilly Park reach at the Wheeler Bend pool (RM 53.4) remained in this area from September 1987 to April 1988. On April 24 both fish were located 2 miles downstream at two backwaters above the old confluence site of the Little Snake River. One of these fish, a large female, was recaptured during block and shock sampling. Upon its subsequent release, this fish moved . downstream and was relocated in a mainchannel eddy 2 miles downstream one hour later. 27