Flight behaviour of malaria mosquitoes around odour-baited traps: capture and escape dynamics
Flight behaviour of malaria mosquitoes around odour-baited traps: capture and escape dynamics
复制标题
DOI：
10.1098/rsos.180246
复制
发表时间：
2018-08-01
影响因子：
3.5
通讯作者：
Muijres, Florian T.
中科院分区：
文献类型：
--
作者：
Cribellier, Antoine;van Erp, Jens A.;Muijres, Florian T.
寻找宿主的蚊子依靠一系列的感官线索来寻找和接近血液宿主，以及避免宿主检测。通过使用气味混合物和吸引嗜蚊的视觉线索，已经开发了气味诱饵诱捕器来监测和控制人类病原体传播媒介。虽然这种诱捕器的远距离吸引力已经被彻底研究，但蚊子对这些诱捕器的近距离反应在很大程度上被忽视了。在这里，我们研究了飞行行为的女性疟疾蚊子（Anopheles coluzzii）在附近的市售气味诱饵陷阱，定位在悬挂和站立的方向。通过分析2500多个三维飞行轨迹，我们阐明了蚊子对陷阱的反应，以及这如何导致捕获。测量的飞行动力学揭示了两种不同的刻板行为：（i）接近陷阱的蚊子倾向于同时向下飞向地面;（ii）靠近陷阱的蚊子通过快速加速向上改变飞行方向。这些行为的结合导致了惊人的不同的飞行模式和捕获动力学，从而形成对比的短程吸引力和捕获机制的相反方向的陷阱。这些新发现可能有助于改进气味诱捕器，从而有助于全球病媒控制战略。
Host-seeking mosquitoes rely on a range of sensory cues to find and approach blood hosts, as well as to avoid host detection. By using odour blends and visual cues that attract anthropophilic mosquitoes, odour-baited traps have been developed to monitor and control human pathogen-transmitting vectors. Although long-range attraction of such traps has already been studied thoroughly, close-range response of mosquitoes to these traps has been largely ignored. Here, we studied the flight behaviour of female malaria mosquitoes (Anopheles coluzzii) in the immediate vicinity of a commercially available odour-baited trap, positioned in a hanging and standing orientation. By analysing more than 2500 three-dimensional flight tracks, we elucidated how mosquitoes reacted to the trap, and how this led to capture. Themeasured flight dynamics revealed two distinct stereotypical behaviours: (i) mosquitoes that approached a trap tended to simultaneously fly downward towards the ground; (ii) mosquitoes that came close to a trap changed their flight direction by rapidly accelerating upward. The combination of these behaviours led to strikingly different flight patterns and capture dynamics, resulting in contrasting short-range attractiveness and capture mechanism of the oppositely oriented traps. These newinsightsmay help in improving odour-baited traps, and consequently their contribution in global vector control strategies.