Invasion information | ||
Range in Japan | Kanto and Hokuriku Districts, Nara, Okayama, Shimane, Yamaguchi, and Fukuoka Prefs. | |
Origin | Biwako Lake, Japan. | |
Date | Unknown. | |
Route | Accidental: Hitchhiking on seed release of ayu (Plecoglossus altivelis altivelis). | |
Impact | Unknown impact. | |
Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
Introduced range in other countries | None. |
Reference | Notes |
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