|Scientific Name:||Pylodictis olivaris (Rafinesque, 1818)|
Silurus olivaris Rafinesque, 1818
|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.|
This species is 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 to be 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:||Native to lower Great Lakes basin and Mississippi, Missouri, and Ohio river basins, from western Pennsylvania to the White-Little Missouri river system, North Dakota, and south to Louisiana; Gulf Slope from Mobile Bay drainage, Georgia and Alabama, to Mexico; introduced in Florida, South Carolina, Idaho, Oregon, Washington, Arizona, California (Lee and Terrell 1987), Canada, and elsewhere.|
Native:Mexico; United States
|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.
Trend over the past 10 years or three generations is uncertain but likely to be relatively stable or slowly declining.
|Current Population Trend:||Stable|
|Habitat and Ecology:||Most abundant in large and medium-sized, low- to moderate-gradient rivers and reservoirs. Highest growth rates generally occur in turbid, relatively shallow areas and in lower portions of streams (Lee and Terrell 1987). Adults occur in deep holes created by swirling currents, often among or near piles of drift, tangled timber, or other cover. Young often found in rocky and sandy runs and riffles (Becker 1983). See Lee and Terrell (1987) for a habitat suitability index model. |
Spawns in secluded shelters and dark places such as hollow logs, riverbank holes, rock crevices, and among submerged timber, at depths of 2-5 m.
|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. 2014. Pylodictis olivaris. The IUCN Red List of Threatened Species 2014: e.T202701A18234613.Downloaded on 15 August 2018.|
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