Cockroaches breed and affect ecosystems Ogasawara Islands Nishinoshima January 11, 5:21
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It has been confirmed that cockroaches are breeding on Nishinoshima in the Ogasawara Islands, whose area has expanded due to eruption activities, and the Ministry of the Environment has decided to consider countermeasures.
On the uninhabited island, Nishinoshima, about 130 km west of Chichijima Island in the Ogasawara Islands, active eruption activity began in 2013, and according to the Japan Coast Guard, the area of the island has expanded about 10 times.
The Ministry of the Environment conducted a landing survey in September last year for the first time in three years to investigate changes in ecosystems, and found a large number of cockroaches.
The cockroach was on the island before the active eruptive activity began, and it was thought that it entered from a fisherman's boat etc., but it has survived after the eruption and may have increased to several hundred animals .
Adults are about four centimeters long and are larger than other insects found on the island, suggesting that they may have an impact on the ecosystem.
The reason why cockroaches bred is not yet well understood, and the Ministry of the Environment is working with experts to analyze and examine removal, but in the process of removing cockroaches with strong fertility, other Because there is a risk that some of the creatures will die or the ecosystem will lose its balance, he says, "I would like to consider the response while observing the situation."