Horseshoe bats and Old World leaf-nosed bats have two discrete types of pinna motions
Horseshoe bats and Old World leaf-nosed bats have two discrete types of pinna motions
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马蹄蝠和旧世界叶鼻蝠有两种离散类型的耳廓运动
DOI：
10.1121/1.4982042
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发表时间：
2017-05-01
影响因子：
2.4
通讯作者：
Mueller, Rolf
中科院分区：
文献类型：
--
作者：
Yin, Xiaoyan;Qiu, Peiwen;Mueller, Rolf
马蹄蝠(犀牛科)和相关的东半球叶鼻蝙蝠(马蜂科)都表现出明显的耳廓运动，作为其生物声纳行为的一部分。在目前的工作中，通过对放置在耳廓上的地标进行三维跟踪，定量分析了每个科的一个物种(铁马菊头蝠和大鼻蝠)的这些运动的运动学。在这两个物种中观察到的耳廓运动分为两类：在“刚性旋转”运动中，耳廓的几何形状保持不变，只改变了它在空间中的方位。在“开合运动”中，耳廓的几何形状发生了变化，这从标志点之间的距离变化中可见一斑。线性判别分析表明，这两个类别的运动可以在分析的数据集中分开，没有任何重叠。因此，这两个物种的蝙蝠有两种不同类型的耳廓运动，显然它们之间没有过渡。研究发现，与最大脉冲能量相关的波长相比，河马的开闭耳廓运动引起的变形要比马菊头蝠大得多(137%比99%)。这两种不同的运动在动物的生物声纳行为中的作用还有待确定。(C)2017年美国声学学会。
Horseshoe bats (Rhinolophidae) and the related Old World leaf-nosed bats (Hipposideridae) both show conspicuous pinna motions as part of their biosonar behaviors. In the current work, the kinematics of these motions in one species from each family (Rhinolophus ferrumequinum and Hipposideros armiger) has been analyzed quantitatively using three-dimensional tracking of landmarks placed on the pinna. The pinna motions that were observed in both species fell into two categories: In "rigid rotations" motions the geometry of the pinna was preserved and only its orientation in space was altered. In "open-close motions" the geometry of the pinna was changed which was evident in a change of the distances between the landmark points. A linear discriminant analysis showed that motions from both categories could be separated without any overlap in the analyzed data set. Hence, bats from both species have two separate types of pinna motions with apparently no transitions between them. The deformations associated with open-close pinna motions in Hipposideros armiger were found to be substantially larger compared to the wavelength associated with the largest pulse energy than in Rhinolophus ferrumequinum (137% vs 99%). The role of the two different motions in the biosonar behaviors of the animals remains to be determined. (C) 2017 Acoustical Society of America.