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Final Report September 2000 3.14 Flows to maintain in-channel and floodplain processes relevant to the life- history needs of endangered fishes within three reaches of the Green River downstream of Flaming Gorge Dam. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-51 4.1 Native fishes in the Green River between Flaming Gorge Dam and the Colorado River confluence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 4.2 Nonnative fishes in the Green River between Flaming Gorge Dam and the Colorado River confluence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 4.3 Distribution and abundance of various life stages of Colorado pikeminnow in the Green River system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17 4.4 Summary of flow and temperature needs of Colorado pikeminnow in the Green River system, Utah and Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45 4.5 Examples of mean daily growth of age-O razorback suckers in fertilized hatchery ponds, in off-channel nursery habitats on the middle or lower Green River, or in the managed wetland, Old Charlie Wash, adjacent to the middle Green River . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-65 4.6 Summary of flow and temperature needs of razorback sucker in the Green River system, Utah and Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73 4.7 Estimated peak hatching and spawning dates for Gila in Desolation and Gray Canyons on the Green River, Utah, and associated instantaneous daily main- channel water temperatures measured at the USGS gage near Green River, Utah, 1992-1996 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84 4.8 Estimated peak hatching and spawning dates for humpback chubs in Westwater Canyon on the Colorado River, Utah, and associated maximum daily main-channel water temperatures measured at the USGS gage near the Colorado-Utah state line, 1992-1996 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-85 4.9 Relationships between water temperature and hatching success and survival of humpback chub larvae ................................................ 4-88 4.10 Summary of flow and temperature needs of humpback chub in the Green River system, Utah and Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-95 5.1 Current known occurrence or future potential occurrence with implementation of flow and temperature recommendations of life stages of endangered fishes in three Green River reaches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 xii