Ding Jianan, Zhang Yu, Han Fujie, Jiang Tingting, Feng Jiang, Lin Aiqing, Liu Ying
Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun 130117, China.
College of Life Science, Jilin Agricultural University, Changchun 130024, China.
Curr Zool. 2022 Mar 15;69(1):32-40. doi: 10.1093/cz/zoac018. eCollection 2023 Feb.
As actively sensing animals guided by acoustic information, echolocating bats must adapt their vocal-motor behavior to various environments and behavioral tasks. Here, we investigated how the temporal patterns of echolocation and flight behavior were adjusted in 2 species of bats with a high duty cycle (HDC) call structure, and , when they flew along a straight corridor and then passed through windows of 3 different sizes. We also tested whether divergence existed in the adaptations of the 2 species. Both and increased their call rates by shortening the pulse duration and inter-pulse interval for more rapid spatial sampling of the environment when flying through smaller windows. Bats produced more sonar sound groups (SSGs) while maintaining a stable proportion of calls that made up SSGs during approaches to smaller windows. The 2 species showed divergent adjustment in flight behavior across 3 different window sizes. reduced its flight speed to pass through smaller windows while increased its flight speed. Our results suggest that these 2 species of HDC bats adopt similar acoustic timing patterns for different tasks although they performed different flight behaviors.
作为受声学信息引导的主动感知动物，回声定位蝙蝠必须使其发声运动行为适应各种环境和行为任务。在此，我们研究了两种具有高占空比（HDC）叫声结构的蝙蝠在沿着直走廊飞行然后穿过三种不同尺寸的窗户时，其回声定位和飞行行为的时间模式是如何调整的。我们还测试了这两个物种在适应性方面是否存在差异。当飞过较小的窗户时，两种蝙蝠都通过缩短脉冲持续时间和脉冲间隔来提高叫声频率，以便更快速地对环境进行空间采样。蝙蝠在接近较小窗户时会产生更多的声纳声音组（SSG），同时保持构成SSG的叫声比例稳定。这两个物种在三种不同尺寸的窗户上表现出不同的飞行行为调整。一种蝙蝠会降低飞行速度以穿过较小的窗户，而另一种蝙蝠则会提高飞行速度。我们的结果表明，这两种HDC蝙蝠尽管飞行行为不同，但在不同任务中采用了相似的声学时间模式。
