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The cutthroat trout (Oncorhynchus sp.) is a group of four fish species [4] [5] of the family Salmonidae native to cold-water tributaries of the Pacific Ocean, Rocky Mountains, and Great Basin in North America. These four species are the Coastal (O. clarkii), Westslope (O. lewisi), Lahontan (O. henshawi), and the Rocky Mountain (O. virginalis
Historically, cutthroat trout was considered one species (Oncorhynchus clarkii).[2] [9] However, recent genetic, taxonomic, and geologic [10] evidence has determined that cutthroat trout should be divided into four species, with each (except for the coastal cutthroat) having multiple subspecies corresponding to the evolutionary lineages [11] found within major river basins.
Lahontan cutthroat trout, lake form, from Pyramid Lake, Nevada. 1938 remarks by FDR on the taste of Nevada trout.. The Lahontan cutthroat is native to the drainages of the Truckee River, Humboldt River, Carson River, Walker River, Quinn River, and several smaller rivers in the Great Basin of North America. [6]
Bonneville cutthroats are descended from cutthroat trout that once inhabited the Late Pleistocene-aged Lake Bonneville of Utah, eastern Nevada, and southern Idaho.Since the desiccation of Lake Bonneville into the Great Salt Lake, which is too salty for any life other than brine shrimp, Bonneville cutthroats have been isolated in smaller populations such as the headwaters of mountain creeks ...
The nominate subspecies, also known as the westslope cutthroat trout, is Oncorhynchus lewisi lewisi. The westslope cutthroat trout is the Montana state fish. [5] The westslope cutthroat trout is a species of concern in Montana [6] and British Columbia [7] ranges and is considered threatened in its native range in Alberta. [8]
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The Rio Grande cutthroat trout (Oncorhynchus virginalis virginalis), [2] a member of the family Salmonidae, is found in northern New Mexico and southern Colorado in tributaries of the Rio Grande. [3] [4] It is one of 9 subspecies [2] of the Rocky Mountain cutthroat trout [2] [5] [6] [7] native to the western United States, and is the state fish ...
The greenback cutthroat trout (Oncorhynchus clarkii stomias) is the easternmost subspecies of cutthroat trout. The greenback cutthroat, once widespread in the Arkansas and South Platte River drainages of Eastern Colorado and Southeast Wyoming , today occupies less than 1% of its historical range.