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there for one week, then moved up to the Dewey Bridge eddy complex. The two fish released on October 20 moved little from the release site. River temperatures dropped from 120 C on October 18, to 50 C by November 14 (Figure 5). Flows remained stable during the 1997 tracking period, fluctuating between 7,400 and 5,400 cfs. The rapid decline in temperature and acclimation to a new environment likely reduced activity and overall longitudinal movement. 1998 - All ten of the radio tagged fish were contacted between five and twenty-nine times (Table 12). The last date of contact occurred 140 days after release on August 5, 1998 (Table 12). Initial dispersal was primarily upstream (0.3 RM) to a slow run section just above the eddy/pool complex selected by most bonytail in the fall/winter of 1997 (Figure 15). Longitudinal movements increased in early to mid Mayas flows moved toward their peak (Figure 15). The majority (8) of bonytail remained within eight river miles of the release site throughout the 1998 tracking. The other two bonytail displayed movements of over 50 river miles downstream between mid-May and mid- July. Maximum movements were 7.2 river miles upstream and 75.7 river miles downstream. The average daily river temperatures were 90 C at release, 12-140 C during May, and 15-23 0 C during June through August (Figure 5). 1999 - All 15 of the radio-tagged fish were contacted between three and sixteen times. The last date of contact occurred 153 days after release on August 24, 1999 (Table 13). Initial dispersal was, again, primarily upstream (0.2 RM) to the deep pooVeddy complex utilized in 199~ (Figure 16). All fish remained in this area until at least April 12. As in1998, longitudinal movdnents increased in late April through mid Mayas flows increased toward their peak (Figure 16). Thirteen of the 15 bonytail moved downstream 1.8 to 54.4 RM during the spring flows. From June through August six of the bonytail which moved downstream began moving back upstream (Figure 16). Maximum movements were 54.4 miles downstream, and 2.2 miles upstream. The mean daily river temperature was 10.70 C at release, and ranged from 12-15.80 C during May, and 13-23.70 C during June through August (Figure 6). Of the two roundtail that were collected and implanted with radio transmitters on May 4, only one (#631) was contacted after implantation (Figure 16). This fish was released above Dewey Bridge (RM 95) after it's initial capture at the confluence of the Dolores River RM (96.5). Two contacts were made upstream at RM 109.0 and 109.2 in June and August, respectively. 2000 - This release occurred in the Green River at river mile 122. The 14 radio-tagged fish were contacted between nine and twenty-three times (Table 14). The last date of contact occurred 127 days after release on July 26, 2000 (Table 14). Initially there was no longitudinal dispersal, the bonytail were remaining in the eddylbackwater habitat in which they were released (Figure 16). All fish remained in this area until early to mid May. As in 1998 and 1999, longitudinal movements increased in mid-Mayas flows increased toward their peak (Figure 16). Half of the bonytail released moved downstream more than 10 RM during the spring flows. Three of those fish moved back upstream in June and July (Figure 16). Maximum movements were 113 river miles downstream, and 5.8 miles upstream. The mean daily river temperature was 8.5 0 C at release, 19-210 C during May, and 20-290 C during June through August (Figure 7). 16