Cottus pitensis


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Cottus pitensis
Species Authority: Bailey & Bond, 1963
Common Name(s):
English Pit Sculpin

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2013
Date Assessed: 2011-11-10
Assessor(s): NatureServe
Reviewer(s): Smith, K. & Darwall, W.R.T.
Facilitator/Compiler(s): Hammerson, G.A. & Ormes, M.
Listed as Least Concern in view of the fairly large extent of occurrence, large number of subpopulations, and large population size, and because the species probably is not declining fast enough to qualify for any of the threatened categories.
2010 Least Concern

Geographic Range [top]

Range Description: Range encompasses the Pit River system (Modoc and Shasta counties, California), including the north and south forks, mainstem, and accessible tributaries down to Squaw Valley Creek (Shasta County); it also includes tributaries to Goose Lake in Oregon and California, including Lassen and Willow creeks (Modoc County, California) and Drews, Cottonwood, and Thomas creeks (Lake County, Oregon) (Moyle 2002).
United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is known from at least a few dozen collection sites that are well distributed throughout the historical range (see map in Lee et al. 1980).

Adult population size is unknown but likely exceeds 10,000; this fish is still common throughout the Pit River drainage in California (Moyle 2002).

Extent of occurrence, area of occupancy, number of subpopulations, and population size probably are relatively stable or declining at a rate of less than 10% over 10 years or three generations.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: This species occupies fast-flowing rocky riffles of cool, well-shaded, small streams, spring-fed creeks, and small boulder-strewn rivers (Moyle 2002).
Systems: Freshwater

Threats [top]

Major Threat(s): No major threats are known. In the Pit River watershed, Pit sculpins have adjusted to degraded habitats in some cases (Moyle 2002).

Conservation Actions [top]

Conservation Actions: Currently, this species is of relatively low conservation concern and does not require significant additional protection or major management, monitoring, or research action.

Citation: NatureServe 2013. Cottus pitensis. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 31 August 2015.
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