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<br />".. ... .,... , <br />OOu~~'t <br /> <br />6 <br /> <br />A.2 - Trout <br /> <br />MO 2: In the Colorado River downstream of Glen Canyon Dam to the confluence of the Paria <br />river, sufficient ecological conditions (such as habitat, foodbase and temperature) should be <br />maintained, which in conjunction with management by Arizona Game and Fish will produce a <br />healthy self-sustaining population of at least 100,000 Age 11+ rainbow trout that achieve 18 <br />inches in length by Age III with a mean annual relative weight (Wr) of at least 0.90. <br /> <br />IN 2.1 Determine ecosystem requirements, population character and structure to <br />maintain naturally reproducing populations of Age II plus fish at 100,000 <br />population levels in Glen Canyon. <br /> <br />IN 2.2 Determine trends in rainbow trout population size, character and structure in <br />Glen Canyon. <br /> <br />IN 2.3 Evaluate harvested and field sampled rainbow trout to determine the <br />contribution of naturally reproduced fish to the population in Glen Canyon. <br /> <br />IN 2.4 Determine the availability and quality of spawning substrates in the Glen <br />Canyon reach, necessary to sustain the rainbow trout fishery. <br /> <br />IN 2.5 Determine the growth and condition of rainbow trout in Glen Canyon. <br /> <br />IN 2.6 Define criteria (e.g., temperatures, flow regimes, contaminants, metals, <br />nutrients) for sustaining a healthy rainbow trout population in Glen Canyon. <br /> <br />IN 2.7 Determine the trophic relationship between trout and the aquatic food base <br />including the size of the aquatic food base required to sustain the desired trout <br />population in Glen Canyon. <br /> <br />A.3 - Native Fish: I <br /> <br />HUMPBACK CHUB lHBC) <br /> <br />MO 3: Enhance the Little Colorado River population ofHBC above 1987 levels determined by <br />ApriVMay hoop-net monitoring in the lower 1,200 meters of the Little Colorado River. (Focused <br /> <br />1 Note that Critical Habitat has been designated in GC for both razorback sucker and humpback chub. As <br />Critical Habitat for razorback sucker, GC may have a role in recovery as a reintroduction site. Such <br />actions would need to be guided by the recovery plan (now in prep) or regional implementation plans. <br /> <br />Revised 6-10-98 <br />