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Diving behavior in Anopheles gambiae (Diptera: Culicidae): avoidance of a predacious wolf spider (Araneae: Lycosidae) in relation to life stage and water depth.


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タイトル: Diving behavior in Anopheles gambiae (Diptera: Culicidae): avoidance of a predacious wolf spider (Araneae: Lycosidae) in relation to life stage and water depth.
著者: Futami, Kyoko / Sonye, George / Akweywa, Peter / Kaneko, Satoshi / Minakawa, Noboru
発行日: 2008年11月
出版者: Entomological Society of America
引用: Journal of medical entomology, 45(6), pp.1050-1056; 2008
抄録: It has been suggested that mosquito larvae and pupae dive to avoid predators. We tested this predator-avoidance hypothesis by using immature Anopheles gambiae Giles (Diptera: Culicidae) and the wolf spider Pardosa messingerae (Stand) (Araneae: Lycosidae). Because previous studies have suggested that wolf spiders are poor predators of immature mosquitoes, we first examined the predatory ability of the wolf spider and found that the spider was effective at capturing all stages of larvae and pupae. The mortality from experimental cups containing deep water increased with the age of mosquitoes, with the exception of pupae. In contrast, this trend was not observed in shallow water. In particular, mortality was significantly lower in deep water during the second instar. During the third instar, the opposite trend was observed. When the effect of cannibalism was excluded by subtracting the number of missing mosquitoes for the treatment without spiders from those with spiders, the cannibalism corrected mortality was significantly lower in deep water during the second instar. The duration of diving by larvae and pupae decreased with age. With the exception of first instar, diving frequency also decreased with age. We postulate that this diving behavior allows An. gambiae to escape predation by wolf spiders, which supports the predator-avoidance hypothesis. This study indicates some important implications for vector control.
キーワード: Anopheles gambiae / Diving / Malaria / Predator avoidance / Wolf spider
URI: http://hdl.handle.net/10069/24528
ISSN: 00222585
DOI: 10.1603/0022-2585(2008)45[1050:DBIAGD]2.0.CO;2
PubMed ID: 19058628
権利: © 2008 Entomological Society of America.
資料タイプ: Journal Article
原稿種類: none
出現コレクション:120 学術雑誌論文

引用URI : http://hdl.handle.net/10069/24528

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