Invasion information |
Range in Japan |
Hokkaido, Akita, Tochigi, Kanagawa (Ashinoko Lake), Yamanashi, and Nagano, Toyama (Kurobe River) Prefs. |
|
Origin |
N America. In Nagano Pref., introduced from France. |
Date |
1877-1926 (Hitchhiking on imports of eggs of other salmoid fishes from USA). The first record of wild population was in 1980 at Niikappu Dam, Hokkaido. In 1973, imported from France to Nagano Pref. and from Canada to Ashinoko Lake, Kanagawa Pref. |
Route |
Accidental: Hitchhiking on introduction of other salmoid fishes (rainbow trout, brook trout, etc.). Deliberate: Transported within Japan for aquaculture and sports fishing. |
Impact |
Predation, competition against native species. Native organism(s) affected: Various native fishes. |
Regulation in Japan |
Introduction to Hokkaido is prohibited. Keeping this species is prohibited in Shiga Pref. |
Introduced range in other countries |
Bhutan, India, Pakistan, Turkey, Croatia, Ethiopia, Kenya, Zimbabwe, South Africa, Australia, New Zealand, Papua New Guinea, Canada, Panama, Bolivia, Peru, Argentine (including Falkland), Kerguelen Is., etc. |