|Scientific Name:||Lethenteron camtschaticum (Tilesius, 1811)|
Lampetra camtschatica (Tilesius, 1811)
Petromyzon marinus ssp. camtschaticus Tilesius, 1811
|Taxonomic Notes:||Earlier known as Lethenteron japonicum.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Smith, K. & Darwall, W.R.T.|
|Contributor(s):||Freyhof, J. & Kottelat, M.|
|Facilitator/Compiler(s):||Hammerson, G.A. & Ormes, M.|
Listed as Least Concern because extent of occurrence, number of subpopulations, and population size are relatively large, and because the species probably is not declining fast enough to qualify for any of the threatened categories.
|Previously published Red List assessments:|
|Range Description:||The almost circumpolar range extends from Lapland eastward to Kamchatka, Russia, and south to Japan and Korea; also the Arctic and Pacific drainages of Alaska and northwestern Canada from the Anderson River and Mackenzie River drainage, Northwest Territories and northern Alberta (south to Great Slave and Artillery lakes), west and south to the Kenai Peninsula, Alaska (McPhail and Lindsey 1970, Page and Burr 2011).|
Native:Canada; China; Japan; Korea, Democratic People's Republic of; Korea, Republic of; Mongolia; Norway; Russian Federation; United States
|FAO Marine Fishing Areas:|
Arctic Sea; Atlantic – northeast; Pacific – northeast; Pacific – northwest
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is represented by a large number of occurrences (subpopulations).|
Total adult population size is unknown but apparently quite large (likely greater than 100,000). This species is considered the most commonly occurring lamprey in Alaska, it is often locally abundant.
Trend over the past 10 years or three generations is uncertain but probably relatively stable or slowly declining.
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Both anadromous and strictly freshwater forms exist. In the nonbreeding season, anadromous forms are at sea, freshwater forms in lakes or larger rivers. Ammocoetes burrow into soft stream margins and beds of silty mud in backwaters. Spawning occurs in clear streams of moderate flow, out of the main current, in depression or pit constructed by both sexes in gravel.|
|Movement patterns:||Full Migrant|
|Major Threat(s):||Threats to spawning habitat include pollution and water flow regulation or dams. Since little is known about local abundance and population trends, there is the potential for overharvest in subsistence and commercial fisheries. Lampreys appear to have habitat needs and life histories similar to anadromous salmon; therefore, in areas where salmon populations are declining, lampreys may also be at risk. The U.S.-Canadian lamprey control program focuses on eradication of the invasive sea lamprey (Petromyzon marinus) in the Great Lakes region and is not generally a threat to Arctic lamprey throughout the North American range. In Europe the species may be threatened by industrial pollution of spawning streams and capture of ammocoetes for use as bait (Lelek 1987, Renaud 1997).|
Taxonomic status needs clarification; genetic studies are needed to better define the relationship between L. alaskensis and L. appendix. Understanding of taxonomic status and evolutionary history of this and other lamprey species may be improved by study of permanent freshwater populations and their relationship to anadromous life-forms of the same species (although no permanent freshwater populations of the Arctic lamprey are known from North America), as well as satellite species.
Effects of parasitism on host species populations need further study.
It would be useful to compile existing data (e.g., commercial fish records, subsistence harvest documentation) from throughout the range to better assess population status (ADFG 2005). Surveys should be conducted at index locations to gauge population trend.
|Citation:||NatureServe. 2013. Lethenteron camtschaticum. The IUCN Red List of Threatened Species 2013: e.T135719A18232889.Downloaded on 21 October 2017.|
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