Tadpoles as dengue mosquito (Aedes aegypti) egg predators
Tadpoles as dengue mosquito (Aedes aegypti) egg predators
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DOI：
10.1016/j.biocontrol.2013.10.005
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发表时间：
2013-12-01
影响因子：
4.2
通讯作者：
Meegaskumbura, Madhava
中科院分区：
文献类型：
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作者：
Bowatte, Gayan;Perera, Piyumali;Meegaskumbura, Madhava
蚕卵在干旱条件下存活，同时携带病原体，使疾病在季节中延续。利用脊椎动物对蚊子进行生物控制主要强调食幼虫鱼类的作用。在这里，我们表明，不同的生活史特征的蝌蚪提前对埃及伊蚊（登革热病毒的媒介蚊子）的鸡蛋。我们做了四个实验，涉及Polypedates cruiger的蝌蚪，以确定：（i）产卵偏好的雌蚊，在正常的水，水，其中蝌蚪先前存在，并在实验时，水，其中蝌蚪存在;（ii）生存的蚊子卵在坦克中存在与不存在的蝌蚪;（iii）通过直接观察卵捕食（iv）如果卵捕食在随机选择的属的四个物种的不同物种的蝌蚪中普遍存在，则蟾蜍、Ramanella、Euphlyctis和Hoplobatrachus仅进行实验（iii）。我们表明，蚊子有一个偏好产卵在蝌蚪水和蝌蚪破坏这些鸡蛋奠定。直接观察证实，所有的蝌蚪物种测试蚊子卵捕食者。全世界约有7000种青蛙，生活在鱼类无法到达的水生栖息地的多样性中，蝌蚪在蚊子生物控制中的作用可能比目前所知的要重要。(C)2013 Elsevier Inc. All rights reserved.
Mosquito eggs survive drought conditions while harboring pathogens, perpetuating diseases through seasons. Biological control of mosquitoes using vertebrates mostly highlights the role of larvivorous fish. Here we show that tadpoles with different life-history characteristics predate on Aedes aegypti (vector mosquito of dengue virus) eggs. We did four experiments involving tadpoles of Polypedates cruciger to determine: (i) egg laying preference of female mosquitoes, in normal water, water in which tadpoles were previously present, and water in which tadpoles were present at the time of experiment; (ii) survivability of mosquito eggs in tanks in presence vs. absence of tadpoles; (iii) egg predation through direct observation (video-recording) and gut content analysis; (iv) if egg predation is prevalent among different species of tadpoles of four species of randomly selected genera, Bufo, Ramanella, Euphlyctis and Hoplobatrachus were subjected to experiment (iii) only. We show that mosquitoes have a preference to lay eggs in tadpole water and that tadpoles destroy such eggs laid. Direct observations substantiate that all tadpole species tested are mosquito egg predators. With about seven thousand frog species worldwide, living in a diversity of aquatic habitats where fish cannot reach, the role of tadpoles in biological control of mosquitoes can be significant than currently understood. (C) 2013 Elsevier Inc. All rights reserved.