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War on Invasive Species Continues in Japan
Local residents in many areas of Japan are attempting to eradicate aquatic invasive species by means of “kaibori,” a traditional agricultural practice of draining ponds.

Japanese farmers used to conduct kaibori during agricultural off-seasons to prevent irrigation ponds from being silted up by mud. In recent years, kaibori has often been used for the purpose of environmental conservation as it is considered a practical way to catch foreign species.

Kaibori was conducted at a pond in Inokashira Park, in Kichijoji, western Tokyo. Of some 20,000 creatures that were captured through kaibori, two-thirds of them were foreign species such as black bass and bluegill. There was even a grass carp and 230 illegally dumped items – such as bicyles and home electronics.

 
 


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Water Chestnut Cleanup a Success - While water chestnut would literally take over the river from shore to shore, the Mystic River Watershed Association and many partners battled the invasive plant with the help of mechanical harvesters and by organizing volunteer hand-pulling events.


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