Notes on mosquitoes in Chichi-jima, Ogasawara Archipelago, Japan and biology of Culex (Sirivanakarnius) boninensis (Diptera : Culicidae)

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  • TOMA Takako
    Laboratory of Medical Zoology, School of Health Sciences, Faculty of Medicine, university of the Ryukyus:Center for Asia-Pacific Island Studies, University of the Ryukyus
  • MIYAGI Ichiro
    Laboratory of Medical Zoology, School of Health Sciences, Faculty of Medicine, university of the Ryukyus:Laboratory of Mosquito Systematics of Southeast Asia and South Pacific, c o Ocean Health Corporation

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  • 小笠原群島の父島で採集された蚊とCulex (Sirivanakarnius) boninensisの室内での生態について

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Abstract

Mosquito collections were made in Chichi-jima, Ogasawara Archipelago in May 1990 and 7 species were identified. Culex mimeticus is a new record for Chichi-jima. The larva of Cx. boninensis was found commonly in ground pools and artificial containers around the dwellings and it was easily colonized in the laboratory. Culex boninensis was stenogamous; copulation took place easily on the wall of a small plastic container (3cm diameter×5cm deep) and it fed easily on chicken, Mongolian gerbil and mouse in this order. Mating took place 8 hours after emergence of both sexes in the container. The insemination rate of the females in the container was about 90%, 2 days after emergence. A mature male copulated with 7-16 mature females in the container during a 24-hr period. The same experiments were carried out for Cx. quinquefasciatus collected in Chichi-jima for comparison.

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