Acoustic Variability and Individual Distinctiveness in the Vocal Repertoire of Red-Capped Mangabeys (Cercocebus torquatus)
Acoustic Variability and Individual Distinctiveness in the Vocal Repertoire of Red-Capped Mangabeys (Cercocebus torquatus)
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DOI：
10.1037/a0025018
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发表时间：
2012-02-01
影响因子：
1.4
通讯作者：
Lemasson, Alban
中科院分区：
文献类型：
--
作者：
Bouchet, Helene;Blois-Heulin, Catherine;Lemasson, Alban
声音信号的声学变异性和个体独特性随着其交际功能和社会互动中个体识别的需要而变化。到目前为止，很少有人尝试在一个物种的声乐曲目中比较研究不同呼叫类型的这些特征。我们收集了来自14只红头白眉猴（Cercocebus torquatus）的6种最常见的呼叫类型的录音，使用一系列时间和频率参数来评估个体内部和个体间的声学变化。声音变异性在接触和威胁呼叫中最高，在食物呼叫中居中，在大声呼叫和警报呼叫中最低。个体独特性在接触、威胁、大声和警报呼叫中较高，而在食物呼叫中较低。总之，调解群体内部社会互动的叫声在结构上是最可变的，个体上也是最独特的，这突出了社会因素在该物种的声乐曲目进化中必须发挥的关键作用。我们在灵长类动物发声行为的声学变异性的现有假设的光讨论这些发现。
Acoustic variability and individual distinctiveness of vocal signals are expected to vary with both their communicative function and the need for individual recognition during social interactions. So far, few attempts have been made to comparatively study these features across the different call types within a species' vocal repertoire. We collected recordings of the six most common call types from 14 red-capped mangabeys (Cercocebus torquatus) to assess intra- and interindividual acoustic variability, using a range of temporal and frequency parameters. Acoustic variability was highest in contact and threat calls, intermediate in food calls, and lowest in loud and alarm calls. Individual distinctiveness was high in contact, threat, loud and alarm calls, and low in food calls. In sum, calls mediating intragroup social interactions were structurally most variable and individually most distinctive, highlighting the key role that social factors must have played in the evolution of the vocal repertoire in this species. We discuss these findings in light of existing hypotheses of acoustic variability in primate vocal behavior.