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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. It is currently listed as threatened under the ...
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.
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).
Colorado Parks and Wildlife. Biologists are on a quest to find a “zombie fish” in Colorado. The Yellowfin cutthroat trout was a fish that once grew up to 12 pounds and fed on other fish. But ...
The Colorado River cutthroat trout ( Oncorhynchus clarkii pleuriticus) is a subspecies of cutthroat trout native only to the Green and Colorado River basins, which are west of the Continental Divide. Cutthroat trout found in other river basins belong to other subspecies.
These trout are found in high-country lakes and stream in the cool mountains. The native subspecies that feed on aquatic and terrestrial insects can grow up to 12 inches. [91] NE Found in the upper Colorado River basin. Greenback cutthroat trout: Oncorhynchus clarki stomias: An endangered species that is in the process of recovery of its ...
During his career he authored more than 100 articles and papers regarding fish and fisheries. He is credited with helping re-discover two native trout subspecies previously believed extinct—the Pyramid Lake strain of the Lahontan cutthroat trout and the Greenback cutthroat trout, the state fish of Colorado. [10]
Both lakes held small greenback cutthroat trout from the early days of the Wild West, but in the mid-1880s reports circulated of much larger trout, up to 10 pounds (5 kg) in weight, with bright yellow fins. Recent research has speculated that the yellowfin cutthroat may have been native to the entire Arkansas River basin, not just Twin Lakes. [2]