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<br />002797 <br /> <br />7.2 Bony tail Chub <br /> <br />The designated critical habitat for the bonytail chub includes portions of the Yampa, Green, and <br />Colorado Rivers and covers the same river reaches as the humpback chub. As shown in Table 1 in <br />Appendix C, the total required pond area varies from a low of 0.5 acres for an adult population <br />density of 10 fish per mile to 2.0 acres for a density of 40 fish per mile. <br /> <br />7.3 Humpback Chub <br /> <br />The designated critical habitat for the bonytail chub includes portions of the Yampa, Green, and <br />Colorado Rivers and covers the same river reaches as the bonytail chub. As shown in Table 2 in <br />Appendix C, the total required pond area varies from a low of 0.7 acres for an adult population <br />density of 10 fish per mile to 2.7 acres for a density of 40 fish per mile. <br /> <br />7.4 Razorback Sucker <br /> <br />The designated critical habitat for the razorback sucker includes portions of the Yampa, Green, <br />White, Duchesne, Gunnison and Colorado Rivers and covers the largest amount of river miles of all <br />the Upper Colorado River endangered fish species. As a result, the estimated pond space for rearing <br />of razorback sucker was much greater than the space estimated for the other species. As shown in <br />Table 3 in Appendix C, the total required pond area varies from a low of 3.7 acres for an adult <br />population density of 10 fish per mile to 14.9 acres for a density of40 fish per mile. <br /> <br />7.5 Summary and Discussion <br /> <br />The previous estimates indicate that large-scale, restoration stocking efforts will require between 6 <br />and 22 acres of pond space over and above that needed for brood stock development. Table 7.5-1 <br />summarizes the pond space estimates for the various adult fish densities. <br /> <br />Table 7.5-1 Summary of Pond Space Requirements for Varying Adult Fish Densities <br />(Acres) <br /> <br />Adult Fish per Colorado BonytaiJ Humphack Razorback <br />River Mile Squawfish Chub Chub Sucker TOTAL <br />10 0.6 0.5 0.7 3.7 5.5 <br />20 1.4 1.0 L3 7.4 11,1 <br />30 L7 I.5 2.0 IL2 16,4 <br />40 2.2 2.0 2.7 14.9 22.0 <br /> <br />37 <br />