東日本大震災による津波被災市街地における蚊幼虫の発生状況（2011年）
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The Great East Japan Earthquake was a magnitude 9.0 (Mw) that occurred on March 11, 2011. The earthquake triggered extremely destructive Tsunami waves of up to 38.9 meters (128 ft) in height that struck almost all architecture and fields in the disaster areas, in some cases traveling up to 10 km (6 mi) inland.Areas affected by the Tsunami were estimated approximately 400 km2 in Tohoku District, located from latitude 35° to 43°. Almost all architecture in the affected area was carried away to the inland or also into the sea. A lot of debris was scattered in the harbor, inland resident area, and field areas.In this summer we focused on occurrence of mosquitoes, such as Aedes togoi, Ae. albopictus,Culex pipiens group,Cx. tritaeniorhynchus, and Cx. inatomii in the disaster areas hit by Tsunami. After cleaning up the big debris from residential area, a lot of septic chambers and tanks related to sewage disposal system remained open. Almost all tanks contained water with salt concentration 0–3.0%. We mainly found and collected Cx. pipiens group, Cx. inatomii, Ae. togoi, Ae. japonicus, Ae. albopictus, Ae. vexans nipponii, Ar. subalbatus from the artificial water containers such as septic chamber and different type of artificial containers. Unfortunately local governmental offices practically did not have any time to concentrate to control mosquitoes, so mass production of several mosquito species occurred in the area. Local governments should be concerned about the big outbreak of mosquitoes in the next spring or early summer and have to plan and construct the mosquito control strategy until next spring.
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