|Scientific Name:||Ptychocheilus grandis (Ayers, 1854)|
Gila grandis Ayres, 1854
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Smith, K. & Darwall, W.R.T.|
|Facilitator/Compiler(s):||Hammerson, G.A. & Ormes, M.|
Listed as Least Concern in view of the large extent of occurrence, large number of subpopulations, large population size, and lack of major threats. Trend over the past 10 years or three generations is uncertain but likely relatively stable, or the species may be declining but not fast enough to qualify for any of the threatened categories under Criterion A (reduction in population size).
|Range Description:||Sacramento-San Joaquin, Pajaro-Salinas, Russian River, upper Pit River, and Clear Lake drainages, California (Lee et al. 1980, Page and Burr 1991). Recently introduced in Eel River, California (Carney and Page 1990).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is represented by a large number of subpopulations and locations.|
Total adult population size is unknown but relatively large.
Formerly more abundant than at present.
|Current Population Trend:||Stable|
|Habitat and Ecology:||Larger and clearer intermittent and permanent streams (with summer temperatures in excess of 15 C) (Lee et al. 1980). Rocky and sandy pools and runs of small to large rivers; common in clear, warm streams (Page and Burr 1991). Usually in undisturbed habitat; rare or absent where introduced predatory fishes plentiful. Usually spawns in streams in gravel riffles where water temperatures exceed 14 C. Populations in reservoirs may spawn near shore on gravel areas (Moyle 1976). Eggs adhere to rocks and gravel.|
|Movement patterns:||Not a Migrant|
|Major Threat(s):||Localized threats may exist, but on a range-wide scale no major threats are known.|
|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. Ptychocheilus grandis. The IUCN Red List of Threatened Species 2013: e.T202358A18231558.Downloaded on 26 September 2017.|
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