Invasion information |
Range in Japan |
Miyagi and Niigata Prefs., Kanto District, and Biwako Lake (Shiga Pref.) |
|
Origin |
Biwako Lake, Japan. |
Date |
Unknown. The first record in Kasumigaura Lake (Ibaraki Pref.) was in 1960. |
Route |
Unknown. Possibly accidental: Hitchhiking with 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 |
Laos, Thailand, Turkmenistan, Kyrgyzstan, etc. |