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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.
Cutthroat trout naturally interbreed with the closely related rainbow trout, producing fertile hybrids commonly called "cutbows" although this is a much rarer occurrence with the coastal cutthroat trout because of reproductive isolation as the coastal cutthroat trout is the only cutthroat subspecies to coevolve through its entire range with the ...
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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 cutthroat trout is thought to have evolved over the past two million years from other Oncorhynchus species which migrated up the Columbia and Snake river basins to the Green and Yellowstone river basins. Within the past 20,000 years, a population which crossed the Continental Divide during the most recent ice age gave rise to the greenback ...
The Snake River fine-spotted cutthroat trout is a form of the cutthroat trout (Oncorhynchus clarkii) that is considered either as a separate subspecies O. c. behnkei, or as a variety of the Yellowstone cutthroat trout (O. c. bouvieri).
Noting, of course, that not all native trout are wild and not all wild trout are native species (i.e. in Montana, a wild brown trout can exist, as well as a hatchery-raised native cutthroat). begs the question, Yes, but so what. There are two sections “Life cycle” and “Habitat” that discuss the behavior of cutthroat trout—spawning, etc.