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each method and second, the "relative catch rate" (RCR) for each method. Relative catch rate is the expected catch per unit effort for every 1,000 fish stocked or: ((C/E)/S)*CS Where C is the catch for a given cohort, E is the effort expended on particular method, S is the number of a given cohort stocked, and CS is a constant of 1000. The utility of this expression can be seen when comparing CPUE for two cohorts with very unequal stocking levels, in addition the values can be statistically compared for a given method. For electrofishing, fyke/hoop netting, and trammel netting, conventional measure of catch rates such as, number of fish caught per hour, were used for analysis. However, for seining, an unconventional measure of catch rate, "number caught per habitat seined", was used for two reasons. First, depletion seining with block nets and multiple seine samples with fish returned after each haul were both used during several years of sampling. If the number captured per area seined was used as a catch rate, depletion sampling would produce lower catch rates compared to returning fish after each haul, as is done during ISMP sampling. The second reason is simply that the area seined was not recorded during several sampling sessions, and a number ofbonytail captures would have been excluded from analyses. We believe that reporting the number of bonytail captured in each habitat seined provides the least biased assessment of seining returns. Telemetry In 1997, 10 bonytail from the 1996 cohort held overwinter at Wahweap (average TL 330.3 mm) were implanted with radio transmitters at the hatchery and held for 10 days. Eight of these fish were released into the Colorado River on October 18, 1997. The remaining two fish were released two days later due to complications with the transmitters. Transmitters were configured to the following specifications: 5 g, external antenna, 60 day battery life. The radio-tagged bonytail were tracked daily for the first two weeks after release and then at least twice weekly. In total, 36 days of general daily tracking occurred between October 21 and December 23, 1997. Tracking was conducted from RM 110 to the confluence with the Green River. On March 9, 1998, another 10 bonytail from the 1996 cohort (average TL 337.3 nun) were implanted with radio transmitters at Wahweap (ATSII> Model 10-18; 80-day transmitter life), returned to the growout pond for a week of recuperation, and then stocked into the Colorado River on March 18, 1998. Bonytail were tracked daily for the first two weeks after release and then at least twice weekly. In total, 36 days of general daily tracking occurred between March 18 and August 6, 1998. Intensive 24-hour tracking sessions, in which hourly triangulations were calculated, were added in 1998 following the previous years observation that bonytails appeared photosensitive. During the intensive sessions, more than one bonytail was often tracked on a given night if the fish were in close enough proximity. Eight intensive tracking efforts were conducted between March 26 and August 6. 6