超快的肌肉设置了回声定位蝙蝠的最大呼叫率
Coen P H Elemans1, Andrew F Mead, Lasse Jakobsen
1Institute of Biology, University of Southern Denmark, DK-5230 Odense M, Denmark. coen@biology.sdu.dk
概括
呼声定位蝙蝠使用专门的超快肌肉在狩猎的终端声期间产生快速呼叫. 喉运动性能,而不是回声重叠,限制了它们的最大呼叫率.
科学领域:
- 生物声学是一种生物声学.
- 动物沟通动物沟通
- 脊椎动物生理学 脊椎动物生理学
背景情况:
- 在捕捉猎物的终端声阶段,回声定位蝙蝠发出高频率 (>160呼叫/秒) 的呼叫.
- 实现这些快速发声的机制在很大程度上是未知的.
- 了解这种机制对于理解蝙蝠狩猎策略和感官生物学至关重要.
研究的目的:
- 为了确定回声定位蝙蝠的终端声中高呼叫率的生理基础.
- 为了确定在回声定位期间限制最大呼叫率的因素.
- 为了研究推动特殊喉肌肉发展的进化压力.
主要方法:
- 在回声定位蝙蝠的喉肌肉的组织学分析.
- 在蝙蝠狩猎行为期间的高速录像和声学录制.
- 电肌图用于测量喉肌肉活动和神经刺激.
主要成果:
- 在蝙蝠喉中发现了以前未知的,高度专业化的超快肌肉.
- 证明这些超快的肌肉负责为终端声的快速呼叫率提供动力.
- 证据表明,喉运动性能,而不是外发电话和返回回声的重叠,限制了最大的呼叫率.
结论:
- 超快的喉肌肉是高频发声的关键,使蝙蝠能够有效地回声定位.
- 这些肌肉的进化很可能是由快速听觉反的优势驱动的,以捕捉快速移动的猎物.
- 这一发现凸显了脊椎动物超快肌肉在声通信方面的罕见发生和特殊适应.
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