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地上水域におけるチカイエカの産卵活動の季節的変化


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Title: 地上水域におけるチカイエカの産卵活動の季節的変化
Other Titles: Seasonal Changes in the Oviposition Activity of Culex pipiens molestus Forskal in the Above-Ground Water
Authors: 小田, 力 / 上田, 正勝
Authors (alternative): Oda, Tsutomu / Ueda, Masakatu
Issue Date: 30-Nov-1979
Publisher: 長崎大学熱帯医学研究所 / Institute of Tropical Medicine, Nagasaki University
Citation: 熱帯医学 Tropical medicine 21(3). p139-144, 1979
Abstract: 地上水域におけるチカイエカの産卵活動の季節的消長を調べるために,ワラの煮汁を入れた水ガメを屋外に設置し,これに生みつけられた卵塊を採集して,それぞれの卵塊を成虫になるまで飼育した.卵塊から無吸血産卵性の雌が生じた場合,その由来の卵塊をチカイエカの卵塊と見倣した.チカイエカの多くの雌が地上水域に産卵に来ており,その産卵活動は春と秋に活発で,夏に低下することがわかった.この産卵活動の季節的変化には,気温が関係しているように思われる.チカイエカは一般には,気温の比較的温暖な長崎地方でも地上で越冬することはむつかしいようである.したがって,当地方においても汚水槽のような地下水域が本種の主要発生場所であると考えられる. / The oviposition activity of Culex pipiens molestus was investigated in the aboveground water. Egg rafts were collected in earthen jars which contained rice-straw infusion. Each of egg rafts was reared to adult mosquitoes. When egg rafts produced autogenous females, they were regarded as the egg rafts of Culex pipiens molestus. It was found that many females of Cx. pipiens molestus deposit egg rafts in the above-ground water. The oviposition activity was low in summer, but high in spring and autumn. This seasonal change is supposed to have some relations with air temperature. It seems to be difficult that this mosquito overwinters above the ground even in the Nagasaki area where winter is comparatively warm. Therefore, it is considered that such underground water collections as cesspools are the main breeding place of this mosquito in this area.
URI: http://hdl.handle.net/10069/4260
ISSN: 03855643
Type: Departmental Bulletin Paper
Appears in Collections:Volume 21, No. 3

Citable URI : http://hdl.handle.net/10069/4260

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