Sociality predicts orangutan vocal phenotype.

Sociality predicts orangutan vocal phenotype.
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DOI:
10.1038/s41559-022-01689-z
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发表时间:
2022-05
影响因子:
16.8
通讯作者:
Wich SA
Wich SA
中科院分区:
生物学1区
文献类型:
--
作者:
Lameira AR;Santamaría-Bonfil G;Galeone D;Gamba M;Hardus ME;Knott CD;Morrogh-Bernard H;Nowak MG;Campbell-Smith G;Wich SA

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对于人类来说,个人的社会环境决定了习得哪种语言以及如何习得语言。社会隔离实验表明,社会性也引导鸣禽和狨猴的声音发育,但缺乏类似的类人猿数据被解释为支持语言起源的突变概念,即使这种实验室协议对类人猿来说是不道德的。在这里,我们描述了猩猩个体的曲目熵,并表明在野外,不同种群的不同程度的社交性与不同的“声音个性”相关,以不同的警报叫声变体形式存在。在高密度人群中,个体的声音更加原始,在声学上难以预测,但新的叫声变体寿命很短,而低密度人群中的个体更加一致,在声学上更加一致,但也表现出更复杂的叫声库。研究结果提供了非侵入性证据,证明社交性可以预测野生类人猿的发声表型。他们证明了错误的假设,认为类人猿具有固有的声音发育程序和非可塑性的声音行为。除了人类之外,社会环境也塑造了原始人类的声音输出。对野生猩猩叫声的分析表明,不同种群的不同程度的社交性与不同的“声音个性”相关。
In humans, individuals’ social setting determines which and how language is acquired. Social seclusion experiments show that sociality also guides vocal development in songbirds and marmoset monkeys, but absence of similar great ape data has been interpreted as support to saltational notions for language origin, even if such laboratorial protocols are unethical with great apes. Here we characterize the repertoire entropy of orangutan individuals and show that in the wild, different degrees of sociality across populations are associated with different ‘vocal personalities’ in the form of distinct regimes of alarm call variants. In high-density populations, individuals are vocally more original and acoustically unpredictable but new call variants are short lived, whereas individuals in low-density populations are more conformative and acoustically consistent but also exhibit more complex call repertoires. Findings provide non-invasive evidence that sociality predicts vocal phenotype in a wild great ape. They prove false hypotheses that discredit great apes as having hardwired vocal development programmes and non-plastic vocal behaviour. Social settings mould vocal output in hominids besides humans. Analysis of wild orangutan calls demonstrates that different degrees of sociality across populations are associated with different ‘vocal personalities’.
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发表时间: 2021-05
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