Invasion information | ||
Range in Japan | Almost entire Japan, include several islands |
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Origin | Unknown. | |
Date | The first introduction was in 1925. Spread since middle 1960s. | |
Route | Deliberate: For sports fishing and for food. | |
Impact | Predation, competition against native species. | |
Regulation in Japan | Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act. | |
Introduced range in other countries |
Reference | Notes |
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100 of the World’s Worst Invasive Alien Species, 100 of the Japan’s Worst Invasive Alien Species |