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<br />3. Detennine movement and the potential for habitat overlaps between <br />bonytail and roundtail. Will these Gila species utilize similar micro- <br />and meso-habitats. <br /> <br />To date, a total of 13,381 have been stocked most around 120 mm TL. In 1997, <br />18 were recaptured and 50 were recaptured in the Spring of 1998. The <br />.-.overwhelming majori ty-(95.4%) of-recaptures- werefound-ina4-mi le.stretch. of <br />river immediately downstream of the release site. However, one ofthe large sized <br />bonytails released on March J 8, J 998 was recaptured by FWS personnel on May <br />28, 1998 at Colorado River mile 63.9, which constitutes the greatest movement <br />of a recaptured fish. Ten bonytail were implanted with radio transmitters and <br />released in the Colorado River on March 18, 1998. Contact was maintained with <br />9 of the IO for at least three weeks, and two fish were tracked into August <br />(beyond the projected transmitter battery life). <br /> <br />IV. Study Schedule: <br /> <br />a. Initial year: 1996 <br />b. Final year: 2000 <br /> <br />V. Relationship to the RlPRAP: <br /> <br />General Recovery Program Support <br />IV. Manage genetic integrity and augment or restore populations <br />IV.A.5. Implement basinwide bonytail restoration plan <br /> <br />VI. Accomplishments ofFY 98 Tasks and Deliverables, Discussion ofInitial Findings and <br />Shortcomings: <br /> <br />Obiective I <br /> <br />To date, a project total of 13,381 bonytail have been stocked: 10,381 in the <br />Colorado River and 3,000 in the Green River (Table 1). All bonytails were <br />hatched at Dexter National fish Hatchery then transferred immediately to <br />UDWR's Wahweap Ponds for growout. Hatchery growth rates varied depending <br />on fish density in the ponds. Bonytails typically achieved '120 mm total length <br />after their first summer at which time most fish were stocked. After two . <br />summers in the Wahweap ponds the 1996 cohort was averaging ~ 16 mm and <br />weighed in excess of300 g. A smaller group of these larger sized fish (N=124) <br />were released in the Colorado River in the fall of 1997 (n= 1 0 radio implants) and <br />early spring of 1 998(n=1 14; ten radio implants). <br /> <br />25-2 <br />