Flight and echolocation behaviour of three vespertilionid bat species while commuting on flyways
Flight and echolocation behaviour of three vespertilionid bat species while commuting on flyways
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DOI：
10.1007/s00359-007-0269-z
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发表时间：
2007-12-01
影响因子：
2.1
通讯作者：
Schnitzler, Hans-Ulrich
中科院分区：
文献类型：
--
作者：
Schaub, Andrea;Schnitzler, Hans-Ulrich
本研究比较了三种蝙蝠在飞行途中的飞行和回声定位行为。我们测量了蝙蝠相对于垂直背景轮廓和相对于地面的空间位置，同时记录了它们的回声定位行为。研究发现，空间环境对蝇道的位置和尺寸以及回声定位行为都有显著影响。在间隙情况下，飞行路径比边缘情况下更窄，更靠近背景结构，飞行速度更低，回波定位信号带宽更大。背景结构的差异不影响飞行和回声定位行为。在相同的林隙情况下往返时，毛竹的飞道位置和尺度与毛竹的相似，但与毛竹的不同，毛竹的飞道位置和尺度比毛竹的略高和更远。在M. brandtii中，飞道的位置和尺寸在3年内保持不变。我们发现不同物种在信号结构上存在差异，但脉冲间隔和飞行速度在所有物种中都是相似的。讨论了可用空间对航路位置、飞行速度和回波定位行为的影响。
This study compares the flight and echolocation behaviour of three vespertilionid bat species while they commute on flyways. We measured the bats' spatial position relative to vertical background contours and relative to the ground while recording their echolocation behaviour. In Myotis daubentonii, we found a significant influence of spatial context on the position and dimensions of flyways as well as on echolocation behaviour. In gap situations, flyways tended to be narrower and located closer to background structures, flight speeds were lower and the bandwidth of echolocation signals was larger than in edge situations. Differences in background structure did not affect flight and echolocation behaviour. When commuting in the same gap situation flyway positions and dimensions for M. daubentonii and Myotis brandtii were similar but differed from those of Pipistrellus pipistrellus, which were slightly higher and further out than those used by the Myotis species. In M. brandtii, flyway positions and dimensions remained constant over 3 years. We found species-dependent differences in signal structure, but pulse interval and flight speed were similar across all species. The influence of available space on the position of flyways, on flight speed and on echolocation behaviour is discussed.