|Scientific Name:||Cottus princeps|
|Species Authority:||Gilbert, 1898|
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Reviewer(s):||Smith, K. & Darwall, W.R.T.|
|Facilitator/Compiler(s):||Hammerson, G.A. & Ormes, M.|
This species is listed as Data Deficient because its trend is unknown. Extent of occurrence and area of occupancy are less than 500 sq km and the species occurs in only two locations, but population size is very large. If the species is declining, it qualifies for Endangered status.
|Previously published Red List assessments:|
|Range Description:||Range includes Upper Klamath and Agency lakes, Oregon, and adjacent irrigation canals (Lee et al. 1980, Page and Burr 2011). The species has been recorded (as Cottus evermanni) from Lost River, Oregon, but that occurrence is extirpated (Page and Burr 2011).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is represented by occurrences in two adjacent lakes that are connected.|
This species is abundant in Upper Klamath Lake, with an estimated 5 million individuals in 1995 (D. Markle pers. comm. 1997).
Trend over the past three generations is unknown. Very little historical information is available and no current information with which to determine trends (A. Bentivoglio and D. Markle pers. comm. 1997).
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Habitat includes rocky and sandy shores of lakes (Page and Burr 2011).|
|Movement patterns:||Not a Migrant|
|Use and Trade:||This species is not utilized.|
|Major Threat(s):||Greatest threat is agricultural run-off resulting in degraded water quality in the Upper Klamath Lake (A. Bentivoglio pers. comm. 1997). Habitat has been severely degraded (C. Allen pers. comm. 1997). However, the Upper Klamath Lake was historically a eutrophic lake (D. Markle pers. comm. 1997).|
|Conservation Actions:||Population trend should be monitored.|
|Citation:||NatureServe. 2013. Cottus princeps. The IUCN Red List of Threatened Species 2013: e.T5442A15361464.Downloaded on 28 May 2017.|
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