Expanded rodent distribution in the tsunami affected areas in the following year of the catastrophic disaster in Eastern Japan

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  • 東日本大震災の津波被災地で被災1年後に拡大したネズミの分布
  • ヒガシニホン ダイシンサイ ノ ツナミ ヒサイチ デ ヒサイ 1ネンゴ ニ カクダイ シタ ネズミ ノ ブンプ

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<p>In 2012, the following year of the Great East Japan Tsunami, rat traps were set on the skirts of rubble heaps and in an abandoned school. In May 2012, adhesive rat traps caught no rat specimen, but recorded evidence of rat infestation, such as feces, fur and foot prints on the surface. At the beginning of July 2012, sixteen Norway rats (Rattus norveigicus) and three roof rats (Rattus rattus) were captured by rat cages or bounce traps in the heaps in the Tsunami affected areas of Iwate and Miyagi Prefectures, showing that nine heaps out of 13 were positive with rats. In the survey in September 2012, rat infestation was higher than that in July. This survey further revealed that 15 out of 16 rubble heaps were positive with rats where 23 Norway rats and 8 roof rats were captured in 31 trap cages. The rats have tendency to break loose from the rubble heaps at the time of removing or selecting the refuse. We recommend control of the rats using rodenticides under the local government administration and with pest control operators of Iwate and Miyagi Prefectures.</p>

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