Can pipistrelles, Pipistrellus pipistrellus (Schreber, 1774) and Pipistrellus pygmaeus (Leach, 1825), foraging in a group, change parameters of their signals?
Can pipistrelles, Pipistrellus pipistrellus (Schreber, 1774) and Pipistrellus pygmaeus (Leach, 1825), foraging in a group, change parameters of their signals?
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DOI：
10.1111/j.1469-7998.2006.00255.x
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发表时间：
2007-06-01
影响因子：
2
通讯作者：
Gaisler, J.
中科院分区：
文献类型：
--
作者：
Bartonicka, T.;Rehak, Z.;Gaisler, J.
利用时间扩展蝙蝠探测仪，研究了侏儒管虫和管管虫的回声定位行为和叫声结构。回声定位信号是在(捷克共和国)摩拉维亚东南部和波希米亚北部的实地以及一个特设实验实验室记录的。对于每个物种，多变量方差分析(MANOVA)表明，在试验室内和在开放环境中发出的叫声有显著差异。配对t检验和Manova检验也被用来揭示每个隐蔽物种的个体间接触对呼叫变量光谱模式的影响。单独在房间内飞行的个体回声定位叫声的频谱变量与一组同类个体的回声定位叫声频谱变量存在差异。蝙蝠利用它们的灵活性来避免回声定位信号的相互干扰的可能性得到了测试。我们发现，成群飞行的蝙蝠会根据同一物种的其他个体的存在来修改它们的回声定位信号参数。这些差异可以表示干扰避免和对自身回波的识别。然而，如果存在其他物种的个体，他们不会改变参数。当蝙蝠以混合物种的群体飞行时，社会呼唤比在单一物种群体中飞行的更多。
Echolocation behaviour and the structure of calls of Pipistrellus pygmaeus and Pipistrellus pipistrellus were studied by using a time expansion bat detector. Echolocation signals were recorded in the field in south-eastern Moravia and northern Bohemia (Czech Republic) and in an ad hoc experimental laboratory. For each of the species, multivariate analysis of variance (MANOVA) indicated significant differences in calls produced inside the experimental room and in the open. Paired t-tests and MANOVA were also used to reveal influences of interindividual contacts in each of the cryptic species on the spectral patterns of call variables. Differences were found in the spectral variables of echolocation calls of an individual flying in the room alone and in a group of conspecifics. The possibility that bats use their flexibility to avoid mutual disturbances of echolocation calls was tested. We found that bats flying in a group modify the parameters of their echolocation signals according to the presence of other individuals of the same species. These differences can indicate jamming avoidance and recognition of own echoes. However, they did not change the parameters if individuals of another species were present. Social calls are more numerous when bats fly in a mixed-species group than in a monospecific group.