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Salmo trutta

Basic information
Scientific name Salmo trutta (No picture)
Common names Brown trout
Higher taxon Salmonidae, Salmoniformes, Actinopterygii
Natural range Europe to Aral Sea
Habitat Cold and well oxygenated freshwater. Fast streams, lakes, ponds, etc. Deeper layer than hatibat of rainbow trout.
Invasion information
Range in Japan Hokkaido, Akita, Tochigi, Kanagawa (Ashinoko Lake), Yamanashi, and Nagano, Toyama (Kurobe River) Prefs. Range in Japan
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.
Affected organism: 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.
Reference Notes
  • DECO (ed) (2006) Dictionary of Alien Species. Tokyo-Shoseki, Tokyo (in Jpn)
  • Ecol Soc Japan (ed) (2002) Handbook of Alien Species in Japan. Chijin-Shokan. (in Jpn)
  • Froese & Pauly (eds) (2009) FishBase (Accessed on 2010-12-09)
  • JWRC (ed) (2008) A Photographic Guide to the Invasive Alien Species in Japan. Heibonsha, Tokyo (in Jpn)
  • Kawanabe et al. (eds) (2002) Freshwater Fishes of Japan, 3rd ed.. Yama-kei Publishers, Tokyo (in Jpn)
  • Matsuzawa & Senou (2008) Alien fishes of Japan. Bun-ichi Sogo Shuppan, Tokyo (in Jpn)
100 of the World’s Worst Invasive Alien Species, 100 of the Japan’s Worst Invasive Alien Species