Convergence and divergence in Diana monkey vocalizations
Convergence and divergence in Diana monkey vocalizations
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DOI：
10.1098/rsbl.2011.1182
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发表时间：
2012-06-23
期刊：
影响因子：
3.3
通讯作者：
Lemasson, Alban
中科院分区：
文献类型：
--
作者：
Candiotti, Agnes;Zuberbuehler, Klaus;Lemasson, Alban
个体不同的发声在社会动物中广泛存在，可能是由声道解剖结构的变化引起的。一个较少探索的个体差异来源是由于声道的学习运动模式，这可能导致社会群体中的声音趋同或分歧。我们研究了两个自由放养组的14只雌性黛安娜猴（Cercopithecus diana）的社会呼叫中的声学相似性模式。通话显示变异的基本频率轮廓，由于个人身份和外部环境。在能见度差的女性之间的声音分歧显着增加，并往往增加邻居的存在。与此相反，女性之间的声音收敛增加显着的声音互动，因为女性匹配的频率轮廓自己的电话与另一个女性的前一个电话。我们的研究结果表明，这些灵长类动物有一些控制其最重要的社会发声的声学精细结构。声音聚合和发散是两个相反的过程，使呼叫者能够确保与其他群体成员的空间接近和社会凝聚力。
Individually distinct vocalizations are widespread among social animals, presumably caused by variation in vocal tract anatomy. A less-explored source of individual variation is due to learned movement patterns of the vocal tract, which can lead to vocal convergence or divergence in social groups. We studied patterns of acoustic similarity in a social call produced by 14 female Diana monkeys (Cercopithecus diana) in two free-ranging groups. Calls showed variability in fundamental frequency contours owing to individual identity and external context. Vocal divergence increased significantly between females during poor visibility and tended to increase in the presence of neighbours. In contrast, vocal convergence increased significantly between females during vocal interactions, because females matched the frequency contour of their own call with another female's preceding call. Our findings demonstrate that these primates have some control over the acoustic fine structure of their most important social vocalization. Vocal convergence and divergence are two opposing processes that enable callers to ensure spatial proximity and social cohesion with other group members.