Selective predation by larval Agabus (Coleoptera: Dytiscidae) on mosquitoes: support for conservation-based mosquito suppression in constructed wetlands
Selective predation by larval Agabus (Coleoptera: Dytiscidae) on mosquitoes: support for conservation-based mosquito suppression in constructed wetlands
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DOI：
10.1111/j.1365-2427.2009.02230.x
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发表时间：
2009-09-01
影响因子：
2.7
通讯作者：
Lamp, William O.
中科院分区：
文献类型：
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作者：
Culler, Lauren E.;Lamp, William O.
P>1。湿地昆虫捕食者可以通过选择性捕食来构建水生猎物群落，但受到的关注远低于脊椎动物捕食者。我们进行了实验室实验来测试两种幼虫龙虱科（Agabus；鞘翅目：龙虱科）的选择性捕食以及这些甲虫对抑制人工湿地中蚊子种群的潜在贡献。2．在无选择测试中，阿加布斯食用桡足类、介形类和蚊子幼虫。当提供选择时，76% 的猎物是蚊子幼虫，这表明选择性捕食。随后的实验表明，这种偏好是由于蚊子幼虫比其他猎物更容易捕获。3。同类相食和群体内捕食在阿加布斯物种内部和物种之间很常见，这可能会减少观察到的选择性捕食的总体影响。4．琼脂幼虫选择性地捕食蚊子幼虫而不是其他猎物，这并不是某些用作蚊子生物防治剂的鱼类的特征。捕食者排除或类似的实地实验可以记录这些结果如何转化为自然环境。5。这项研究的结果表明，制定以保护本地湿地捕食者为重点的蚊子抑制策略。这些策略比引入非本地多面性掠食者或使用杀虫剂更可取。
P>1. Wetland insect predators can structure aquatic prey communities via selective predation, but receive considerably less attention than vertebrate predators. We conducted laboratory experiments to test selective predation by two species of larval dytiscid beetles (Agabus; Coleoptera: Dytiscidae) and the potential contribution of these beetles to suppression of mosquito populations in constructed wetlands.2. Agabus consumed copepods, ostracods and mosquito larvae in no-choice tests. When offered a choice, 76% of all prey consumed were mosquito larvae, indicating selective predation. Subsequent experiments revealed this preference was due to ease of capture of mosquito larvae over alternative prey.3. Cannibalism and intraguild predation were common within and between species of Agabus, which may reduce the overall impact of the observed selective predation.4. Agabus larvae selectively preyed on mosquito larvae over alternative prey, which is not characteristic of some fish used as biological control agents for mosquitoes. Predator exclusion or similar experiments in the field could document how these results translate into a natural setting.5. The findings of this study suggest developing mosquito suppression strategies focused on conservation of native wetland predators. These strategies are preferable to introducing non-native generalist predators, or applying pesticides.