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logger located on the south bank of the Colorado River at Island Acres State Park. According to telemetry records, the fish spent about 3 days immediately downstream from the number 1 siphon before returning back through this siphon, continuing back upstream in the canal, and returning to the Colorado River. It was contacted 20 July at RM 195, 1.3 miles upstream from the Government Highline Diversion Dam. This same fish along with one of its wild counterparts, Code 133, passed over the diversion dam and passed the Island Acres tracking station in mid- August. These two fish were never contacted again. Three other wild Colorado p>7ceminnow remained upstream of the Government Highline Dam Code 61 fish was last detected immediately upstream from the diversion dam in mid- November 2000. Code 141 had moved downstream as far as the Government Highline Dam in early-August 2000 but later moved upstream. It was last detected at RM 207.5 in mid-March 2001, which is about 1.3 miles downstream from the Debeque Bridge. It appeared that this fish was moving upstream at the time of this contact (Figure 3). One other fish (Code 62) was contacted in the same location on six different dates between 26 June 2000 and 14 September 2001. The apparent lack of movement from this signal leads us to suspect that this fish was dead. Domestic Fish Contact was maintained with this group ofradio-tagged fish from 2 through 446 days (Table 1). No upstream movements from any of these five fish were detected. Code 70 moved downstream 31 miles following release and passed the Island Acres telemetry station in 37 hours. Telemetry data indicated that the signal remained there for only 2 minutes. This fish was never contacted again. The short time that it took for this fish to trave131 miles (almost 1 mile/hour) downstream leads us to believe that this fish was dead. Code 69 immediately moved downstream about 15 miles and remained there for 47 days. The signal was then contacted at RM 203.7 on seven different occasions from 12 March 2001 to 7 August 2001. Despite never recovering the radio transmitter, it was triangulated to be above the water line on a gravel bar at the head end of Debeque Canyon. It was believed that this fish was dead. Code 65 was contacted seven different times from 26 July 2000 to 12 September 2001 at RM 193.7, immediately upstream of the Government Highline Diversion Dam The signal of Code 66 was not detected unti113 March 2001, 263 days following its release. This fish was detected on six different occasions frommid- March to mid-July only 1.1 miles downstream from its release point. Code 68 was contacted 12 times at the same location, RM 225.6, frommid-July 2000 to mid-September 2001, which was 2 miles downstream from its release point. The apparent lack of movement from these signals leads 16