The Oregon Chub is a species of ray-finned fish in the Cyprinidae family.
It is endemic to Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

 in the United States. It is a federally listed threatened species.

This chub

Chub

The European chub , sometimes called the round chub, fat chub, chevin, pollard or simply "the" chub, is a freshwater fish of the family Cyprinidae...

 is native to the drainage of the Willamette River

Willamette River

The Willamette River is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is long, lying entirely in northwestern Oregon in the United States...

 in Oregon. It was once distributed throughout the drainage in shallow water habitat, but changes in the hydrology

Hydrology

Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability...

 of the region have eliminated much of this habitat and restricted the chub to several streams and rivers. Dam

Dam

A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

s and channels were constructed and non-native species

Introduced species

An introduced species — or neozoon, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its indigenous or native distributional range, and has arrived in an ecosystem or plant community by human activity, either deliberate or accidental...

of fish were introduced to the area. The chub was listed as endangered in 1993 and downlisted to threatened in 2010.

External links

• Gimenez Dixon, M. 1996. Oregonichthys crameri. 2011 IUCN Red List of Threatened Species. Downloaded on 29 August 2011.