Mosquitoes modulate leg dynamics at takeoff to accommodate surface roughness
Mosquitoes modulate leg dynamics at takeoff to accommodate surface roughness
复制标题
蚊子在起飞时调节腿部动力学以适应表面粗糙度
DOI：
10.1088/1748-3190/aaed87
复制
发表时间：
2018
影响因子：
3.4
通讯作者：
Andrew K. Dickerson
中科院分区：
文献类型：
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作者：
Nicholas M Smith;G. Clayton;Hiba A Khan;Andrew K. Dickerson
昆虫从几乎无法量化的表面排列中起飞，许多昆虫在翼拍开始之前用腿启动向上运动，包括蚊子。在这项研究中，我们研究了埃及伊蚊无缘无故的起飞前的机制，从两个表面的对比粗糙，一个粗糙度类似于抛光玻璃，另一个类似于人类的前臂。使用高速摄像技术，我们发现蚊子在起飞前会表现出两种截然不同的腿部动作，一种是被广泛观察到的推力，另一种是之前未被记录的腿部撞击，即最后面的一条腿被抬起并撞击地面。在106个起飞序列中，我们观察到越光滑的表面腿部撞击的发生率越高，并通过比较蚊子鞑靼和每个测试表面上表面特征的特征大小来合理地解释这一观察结果。起飞前运动学的测量显示，这两种策略都保持在哺乳动物毛发的机械感知阈值以下，并产生几乎相同的垂直身体速度。最后，我们建立了一个模型，解释了蚊子利用腿撞击腿的测量速度，0.59m S−1。
Insects perform takeoffs from a nearly unquantifiable number of surface permutations and many use their legs to initiate upward movement prior to the onset of wingbeats, including the mosquito. In this study we examine the unprovoked pre-takeoff mechanics of Aedes aegypti mosquitoes from two surfaces of contrasting roughness, one with roughness similar to polished glass and the other comparable to the human forearm. Using high-speed videography, we find mosquitos exhibit two distinct leg actions prior to takeoff, the widely observed push and a previously undocumented leg-strike, where one of the rearmost legs is raised and strikes the ground. Across 106 takeoff sequences we observe a greater incidence of leg-strikes from the smoother surface, and rationalize this observation by comparing the characteristic size of surface features on the mosquito tarsi and each test surface. Measurements of pre-takeoff kinematics reveal both strategies remain under the mechanosensory detection threshold of mammalian hair and produce nearly identical vertical body velocities. Lastly, we develop a model that explicates the measured leg velocity of striking legs utilized by mosquitoes, 0.59 m s−1.
影响因子：
3.6
作者：
R. Bleischwitz;R. Kat;B. Ganapathisubramani
通讯作者：
R. Bleischwitz;R. Kat;B. Ganapathisubramani