Survival and development of larvae of three tropical malaria vectors (Diptera : Culicidae) under a seasonally changing temperature condition in Nagasaki, Japan

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  • HU Xi-Min
    Hainan Provincial Institute of Tropical Diseases:Department of Vector Ecology & Environment, Institute of Tropical Medicine, Nagasaki University
  • TSUDA Yoshio
    Department of Medical Entomology, National Institute of Infectious Diseases
  • TAKAGI Masahiro
    Department of Vector Ecology & Environment, Institute of Tropical Medicine, Nagasaki University

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  • 長崎市の季節的気温条件における3種の熱帯産マラリア媒介蚊幼虫の生存と発育について(英文)

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Abstract

Survival and development of larvae of Anopheles dirus Peyton et Harrison, An. minimus Theobald and An. stephensi Liston were examined under natural temperature in a temperate area, Nagasaki (32゜45' N, 129°52' E), Japan. Experiments with hatched larvae were conducted 7 times at 1-month intervals from April to October 2002. The larvae could develop to adults and a seasonal change was observed in the developmental period of all three species. The relationships between the average air temperature and the developmental rate observed from April to October 2002 were analyzed by a linear regression method to estimate the threshold air temperature of larval development. The estimated threshold air temperatures of larval development for females of An. dirus, An. minimimus and An. stephensi were 9.4℃, 5.7℃ and 9.3℃, respectively. A seasonal change was also observed in the body sizes of pupae.

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