|Scientific Name:||Mustela itatsi|
|Species Authority:||Temminck, 1844|
|Taxonomic Notes:||Abramov (2000), Kuroseet al. (2000), and Graphodatsky et al. (1976) supported separation of itatsi from sibirica. It is sometimes considered a subspecies of the Siberian Weasel Mustela sibirica.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor/s:||Abramov, A. & Wozencraft, C.|
|Reviewer/s:||Duckworth, J.W. (Small Carnivore Red List Authority) & Schipper, J. (Global Mammal Assessment Team)|
This species is listed as Least Concern, although there is interspecific competition with introduced populations of Mustela sibirica this species is widespread geographically in Japan and is not thought to be declining at a rate to qualify for a threat category.
|Range Description:||This species is endemic to Japan on Honshu, Kyushu, Shikoku, Sado, Oki Islands, Izu-Oshima, Awaji, Shoudo, Iki, Goto Islands, Yaku and Tane, and introduced to Hokkaido in the 1880s (Inukai 1934). It was introduced for control of rats on about 50 islands, including Sakhlain, Rishiri, Rebun, Izu Islands (Miyake, Hachijo, Aogashima), Aoshima (Nagasaki Prefecture), Kuchino, Nakano, Suwanose, Hira, Akuseki, Kikai, Okinoerabu, Yoron (Kagoshima Prefecture), Zamami, Aka, Minami-Daito, Kita-Daito, Irabu, Iriomote, Hateruma (Okinawa Prefecture) (Shiraishi 1982). It is naturalized on some islands (Abe, 2005). It is found in most elevation zones, but mainly at lower elevations (Sasaki pers. comm. 2006).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is common.|
|Habitat and Ecology:||This species occurs in grasslands, forests, villages, and suburbs, but not in big cities (Sasaki pers. comm. 2006). Rodents, insects, amphibians and reptiles make up the main part of its diet (Sasaki pers. comm. 2006). It shows extreme sexual dimorphism (male:450 g, female:150 g ) (Sasaki pers. comm. 2006). It is found in most habitats across Japan.|
|Major Threat(s):||It does not tolerate urbanization (Sasaki pers. comm. 2006). In western Japan, the Japanese Weasel is being driven to marginal montane habitats by competition with the introduced Siberian Weasel (Mustela sibirica) (Abe, 2005).|
|Conservation Actions:||Females of this species are protected from hunting by law (Sasaki pers. comm. 2006). It is ranked as a near threatened species in the Red List of nine prefectures in the western Japan (Sasaki pers. comm. 2006).|
Abe, H., Ishii, N., Ito, T., Kaneko, Y., Maeda, K., Miura, S. and Yoneda, M. 2005. A Guide to the Mammals of Japan. Tokai University Press, Kanagawa, Japan.
Inukai, T. 1934. The invasion and use of weasels in Hokkaido, Shokubutu oyobi Doubutu. 2(3): 1309-1317.
Shiraishi, S. 1982. Rat control by weasels. Saisyu to Shiiku 44(9): 414-419.
Wozencraft, W. C. 2005. Order Carnivora. In: D. E. Wilson and D. M. Reeder (eds), Mammal Species of the World: A taxonomic and geographic reference. Third Edition, pp. 532-628. Smithsonian Institution Press, Washington, DC, USA.
|Citation:||Abramov, A. & Wozencraft, C. 2008. Mustela itatsi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 08 March 2014.|
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