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The following list of known freshwater fish species, subspecies, and hybrids occurring in the U.S. state of Idaho is taken from Wydoski and Whitney (2003). Some scientific names have been updated or corrected. Asterisks denote introduced fishes. The list includes several anadromous species.
Bear River cutthroat trout O. v. ssp. Native to the Bear River watershed at the Idaho, Utah, and Wyoming border. The Bear River cutthroat were lumped with the Bonneville cutthroat as a single subspecies until recently. [13] [5] Genetic studies show they are actually more closely related to the Yellowstone cutthroat than to the Bonneville cutthroat.
This is an incomplete list of the species of mammals, reptiles, amphibians, and fish found in the Sawtooth National Recreation Area in central Idaho. [1] Gray wolves were reintroduced to central Idaho in the 1990s while grizzly bears have been extirpated from the area, and plans to reintroduce them have been abandoned.
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 species is also found in Idaho, Utah and Nevada. [3] It is believed that it got into Yellowstone River (which drains into Atlantic) from Snake River (which drains into Pacific) drainages through a small creek known as Parting of the Waters. It is one of the few aquatic species that has crossed a continental divide. [4] [5]
The two species of dace were cumulatively the largest individual fish population in the watershed, while steelhead accounted for 58.4% of the biomass. Of all the streams sampled during the study, the West Fork Potlatch River had the highest diversity because of its relatively pristine condition.
The McCloud River redband trout is found in small tributaries of the McCloud River and Pit River which are tributaries of California's Sacramento River. The Great Basin redband trout is found in seven distinct basins in southeastern Oregon, and parts of California and Nevada on the periphery of the Great Basin. [1] Redband trout have often been ...
Analysis by Robert Benhke, Eric Wagner, and Steve Culver proved the species to be a presumably introduced population of Sunapee trout. Later research found reports of a trout egg trade between the Idaho and the New Hampshire Fish and Game departments. [4] They are reportedly found in two Idaho bodies of water, Alice and Sawtooth Lakes.