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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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It’s an Aquatic Weed Harvester - According to Don Richardson, Bakersfield Water superintendent, the big advantage of using an aquatic weed harvester is that they don’t have to use a lot of chemicals. “Using chemicals to kill weeds in lakes can be dangerous because the chemicals could seep into the groundwater. Also, one chemical treatment for a lake can cost about $16,000.


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