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<br />") <br /> <br />Movements of individual fish varied greatly and will be addressed more <br />completely in a project final report. At the end of the study two transmitters <br />were still functioning, both fish were located upstream of the release site. <br /> <br />Table 3. Bonytail used in the 1998 telemetry study and a sununary of associated <br />radio tracking infonnation. Fish were implanted on March 9, 1998 and <br />stocked on March 18, 1998:' <br /> <br />Freq TL Wt No. Of No, Of Intens. Last Last contact <br />(40.=) (mm) (g) Contacts Tracks Contact Location <br /> Date <br />041 333 333 27 I 980706 94.1 <br />081 327 329 II 980421 94.1 <br />102 347 365 20 3 980514 94.8 <br />121 338 386 5 980325 94.4 <br />152 340 352 24 3 980529 79.6. <br />601 343 394 22 3 980806 1018 <br />661 337 340 10 1 980413 94.6 <br />702 338 389 12 I 980421 90.0 <br />742 337 380 17 3 980602 94.8 <br />?R'" '" ,., ?O , n.n.~ O^' <br /> <br />) <br /> <br />'this fish was found by NPS personnel at RM 18.6 on July 9, 1998 <br />., this fish was recaptured at RM 95 on June 29,1998 <br /> <br />Preliminary efforts in the fall of 1997 indicated the bonytails were photosensitive, <br />therefore we increased our efforts to track the 1998 fish during crepuscular and <br />nocturnal periods. This intensive tracking consisted of hourly triangulations, <br />typically commencing at 1600 hours and continuing through 0800 hours. These <br />intensive tracking efforts occurred on eight occasions between March 26, 1998 <br />and August 6, 1998. Due to the proximal location of bonytails, it was possible to <br />track more than one fish through a night on several occasions; Eight of the ten <br />bonytail were intensively tracked at least one time, several as many as three times <br />(refer to table 3). Habitat use, general movement and diel activity will be <br />analyzed and reported in a project final report. <br /> <br />VII. Recommendations: <br /> <br />Stock the balance of the 1998 cohort in the spring of 1999. Begin sampling for <br />stocked fish soon after this spring release. Place greater emphasize on <br />electrofishing as a sampling techniques to recapture bonytails. . <br /> <br />Continue radio telemetry efforts on the Colorado River. Obtain aerial imagery of <br />the Dewey bridge area on the Colorado River to serve as a base map for radio <br />telemetry efforts in the future. In the SOW there is mention ofradio telemetering <br />adult sized roundtail chubs to detennine resource overlap with the stocked <br />bonytails. To date collections of wild roundtail chubs large enough to implant <br /> <br />25-5 <br />