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Show Colorado cutthroat trout Undetermined Utah cutthroat trout Undetermined June sucker •* ? Undetermined Sacramento perch Undetermined Humpback sucker Rare Bear Lake whitefish Rare Bonneville cisco Rare Bonneville whitefish Rare Least chub Rare Bear Lake sculpin Rare The Colorado cutthroat, June sucker and least chub are native to the area included in the Bonneville Unit. However, the consensus is that the Colorado cutthroat is threatened and the Utah cutthroat trout is nearly extinct already."" Specimens of June sucker have recently been found in Utah Lake, Mona Reservoir and the Jordan River near the proposed site of Lampton Reservoir. The least chub is reported to still inhabit the Jordan River. The utilization of waters by man, pollution, irrigation practices, overgrazing, cutting of forests and introduction of alien species have all contributed to the depletion and replacement of native stocks. Introduction of bait fishes as well as extensive intentional plantings of exotic game species, primarily the rainbow trout, and transbasin water diversions have resulted in mixing of once distinct populations such as those of the Bonneville and Colorado Basins. 68 Significant amounts of water have been diverted from the Colorado River Basin to the Bonneville basin since the early 1900' s. Currently there are 17 active inter- basin diversion operations that transport about 100,000 acre- feet of water annually. " There is also one diversion in which the flow of water is reversed. The Yellowstone cutthroat has probably replaced native stocks of Colorado River and Utah cutthroat through hybridization following widespread and repeated stocking. The most economically valuable species are the game fishes which have nearly all been introduced. Some of the most popular sports fish are the Yellowstone cutthroat, rainbow, brown and brook trout, the channel catfish, the white bass and the largemouth bass. The trouts are found in many of the lakes, reservoirs and streams within the limits of the Bonneville Unite The latter three species inhabit Utah Lake. The mountain whitefish, one of the few remaining native game fish, is not very abundant in the Unit area. Fishery management in Utah, as well as in the proposed Bonneville Unit area, depends heavily upon artificial propagation with hatchery stocks. The 39th Biennial Report of the Utah State Division of Fish and Game"' ( Now the Division of Wildlife Resources) reports that about 32 million 131 |
