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11 <br /> <br />1 <br /> <br /> <br />f <br /> <br /> <br />1 <br /> <br /> <br />1 <br />t <br /> <br />I <br /> <br /> <br /> <br />Abstract <br />Bonytail captures in the Upper Colorado River Basin (UCRB) are <br />infrequent. The numbers of bonytail in the UCRB are too low for recovery <br />without reintroduction. Reintroduction appears to be the only option for <br />recovery of a wild bonytail population (Valdez and Clemmer 1982). If <br />reintroduction does not occur, bonytail should be considered extirpated from <br />the UCRB. This plan is an interactive guideline and process of evaluation <br />that outlines the reintroduction and eventual recovery of hatchery reared <br />bonytail into their native environment of the Green and Colorado rivers of the <br />UCRB. Because so little is known about life history requirements and <br />evolutionary history of bonytail, laboratory experiments will be conducted to <br />help in the design of the reintroduction stocking program. Reintroduction <br />will be implemented through field experimentation to determine ecological <br />factors important to stocked fish and to different life stages of bonytail. <br />This plan is formatted to incorporate current and proposed experimentation <br />into the implementation and management of bonytail reintroduction in the UCRB. <br />The plan is intentionally designed to adapt laboratory and field experimental <br />results into outyear objectives. <br />Rey Words: bonytail, Gila elegans, Upper Colorado River Basin, endangered <br />fishes, reintroduction <br />2 <br />