Invasion information |
Range in Japan |
Established in Tone-Edo River System and Yodogawa River System. However, constantly released in many lakes. |
|
Origin |
Continental China |
Date |
Grass carp was imported since 1878. In 1943 and 1945, released in Tonegawa River. |
Route |
Accidental: Hitchhiking on grass carp seedling. However, deliberately released in many lakes and rivers. |
Impact |
Impact on native fishes seems little. There is a report that Japanese crucian carp in Teganuma pond, Chiba Pref (introduced population) have been reduced with increase of this species. Native organism(s) affected: |
Regulation in Japan |
Capture of this species is regulated by several local governments. |
Introduced range in other countries |
Wide area of Asia and Europe, a part of Africa, USA, etc. |