Invasion information |
Range in Japan |
Tokyo, Chiba, Saitama Prefs. |
|
Origin |
N America |
Date |
Imported before W.W.II. The first record of naturalization in Japan is in 1947. |
Route |
Deliberate: Bred for fur before the W. W. II, and released after the War. |
Impact |
Actually: Predation on aquatic plants such as lotus. In Europe, destruction of bank and dam by nest building. |
Regulation in Japan |
Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act. |
Introduced range in other countries |
C & N Europe, Ukraine, Russia, Mongolia, China, and NE Korea. |