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Sociality predicts orangutan vocal phenotype

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Lameira, Adriano R., Santamaría-Bonfil, Guillermo, Hardus, Madeleine E., Galeone, Deborah, Gamba, Marco, Knott, Cheryl D., Morrogh-Bernard, Helen, Nowak, Matthew G., Campbell-Smith, Gail and Wich, Serge A. (2022) Sociality predicts orangutan vocal phenotype. Nature Ecology & Evolution, 6 . pp. 644-652. doi:10.1038/s41559-022-01689-z

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Official URL: https://doi.org/10.1038/s41559-022-01689-z

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Abstract

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.

Item Type: Journal Article
Subjects: Q Science > QL Zoology
Divisions: Faculty of Science, Engineering and Medicine > Science > Psychology
Library of Congress Subject Headings (LCSH): Animal communication, Orangutans -- Behavior, Primates -- Behavior, Animal intelligence
Journal or Publication Title: Nature Ecology & Evolution
Publisher: Nature Research
ISSN: 2397-334X
Official Date: May 2022
Dates:
DateEvent
May 2022Published
21 March 2022Available
2 February 2022Accepted
Volume: 6
Page Range: pp. 644-652
DOI: 10.1038/s41559-022-01689-z
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Copyright Holders: © The Author(s) 2022
Date of first compliant deposit: 11 February 2022
Date of first compliant Open Access: 13 April 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
702137[ERC] Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
MR/T04229X/1UK Research and Innovation’s Future Leaders FellowshipUNSPECIFIED
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