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<br />------------------- <br /> <br /> <br />HUMPBACK CHUB <br />lower basin recovln unit <br /> <br />1. The Grand Canvon population is maintained as a core over a 5- <br />vear period, staning with the first point estimate acceptable to <br />the Senice, such that: <br /> <br />a. the trend in adult [age 4+] point estimates does not <br />decline significantlv, and <br /> <br />b. mean estimated recruitment of aue-3 naturallv <br />produced fish equals or exceeds adult monalilV, and <br /> <br />c. each core population point estimate exceeds 2,100 <br />adults <br />