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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.
List of fishes of Yellowstone National Park
The westslope cutthroat trout (Oncorhynchus lewisi), also known as the black-spotted trout, common cutthroat trout and red-throated trout is a species of the cutthroat trout group and is a freshwater fish in the salmon family (family Salmonidae) of order Salmoniformes. [4] The cutthroat is the Montana state fish. [5]
Michael Wright, The Spokesman-Review, Spokane, Wash. August 16, 2024 at 11:59 PM. Aug. 16—The North Fork of the St. Joe River is the least prominent of North Idaho's north forks. Anglers are ...
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] These were tributaries of ancient and massive Lake Lahontan during the ice ages until the lake shrank to remnants such as Pyramid Lake and Walker ...
The coastal cutthroat trout (Oncorhynchus clarkii clarkii), also known as the sea-run cutthroat trout, blue-back trout or harvest trout, is one of the four species [3][4] of cutthroat trout found in Western North America. The coastal cutthroat trout occurs in four distinct forms. A semi- anadromous or sea-run form is the most well known.
However, the most serious current threats to the subspecies are interbreeding with introduced rainbow trout (resulting in cutbows) in the Greater Yellowstone ecosystem, the presence of lake trout in Yellowstone and Heart lakes in Yellowstone National Park which prey upon cutthroat trout to 15 inches in length, and several outbreaks of whirling ...