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<br />000291 <br /> <br />TABLE OF CONTENTS (Continued) <br /> <br />Page <br /> <br />3.2 Colorado Pikeminnow . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. 3-14 <br />3.2.1 Distribution and Abundance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-14 <br />3.2.2 Habitat Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-21 <br />3.2.3 Reproduction ............................................. 3-23 <br /> <br />3.2.4 Growth .................................................. 3-31 <br /> <br />3.2.5 Summary of Seasonal Flow-Habitat Relationships for <br />Colorado Pikeminnow ...................................... 3-34 <br />3.3 Razorback Sucker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-38 <br />3.3.1 Distribution and Abundance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-38 <br />3.3.2 Habitat Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " 3-42 <br />3.3.3 Reproduction ............................................. 3-44 <br /> <br />3.3.4 Growth .................................................. 3-48 <br /> <br />3.3.5 Summary of Seasonal Flow-Habitat Relationships for <br />Razorback Sucker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-49 <br />3.4 Humpback Chub ............................................... 3-52 <br />3.4.1 Distribution and Abundance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-52 <br />3.4.2 Habitat Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-55 <br />3.4.3 Reproduction ............................................. 3-55 <br /> <br />3.4.4 Growth .................................................. 3-58 <br /> <br />3.4.5 Summary of Seasonal Flow-Habitat Relationships for <br />Humpback Chub. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ; . . . . . . . . . . .. 3-58 <br /> <br />3.5 Bonytail...................................................... 3-61 <br /> <br />4.0 FLOW RECOMMENDATIONS TO BENEFIT ENDANGERED FISHES. . . . . .. 4-1 <br />4.1 Summary of Endangered Fish, River Flow, and Habitat Relationships ...... 4-1 <br />4.1.1 Colorado Pikeminnow ....................................... 4-1 <br />4.1.2 Razorback Sucker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-3 <br />4.1.3 Humpback Chub. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-4 <br />4.2 Integration of Biological and Physical Processes ....................... 4-4 <br />4.2.1 Goal ~d Objectives of the Flow Recommendations. ............... 4-5 <br />4.2.2 Hydrologic Categories for Annual Recommendations. .............. 4-6 <br />4.2.3 Basis for Level and Duration of Annual Spring Target <br /> <br />Flows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-9 <br /> <br />4.3 Flow Recommendations for the Gunnison River ...................... 4-18 <br />4.3.1 Spring Peaks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-18 <br /> <br />4.3.2 Base Flows ....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-22 <br /> <br />4.4 Flow Recommendations for the Colorado River Downstream from the <br /> <br />Gunnison River. ............................................... 4-23 <br /> <br />4.4.1 Spring Peaks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-23 <br /> <br />4.4.2 Base Flows ......................................... . . . . .. 4-27 <br /> <br />Final Report <br /> <br />July 2003 <br /> <br />11 <br /> <br />