Chimpanzees communicate to coordinate a cultural practice

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Proceedings of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2023, 290(1991), 20221754. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2022.1754
Zusammenfassung

Human culture thrives by virtue of communication, yet whether communication plays an influential role in the cultural lives of other animals remains understudied. Here, we investigated whether chimpanzees use communication to engage in a cultural practice by analysing grooming handclasp (GHC) interactions—a socio-cultural behaviour requiring interindividual coordination for successful execution. Previous accounts attributed GHC initiations to behavioural shaping, whereby the initiator physically moulds the partner's arm into the desired GHC posture. Using frame-by-frame analysis and matched-control methodology, we find that chimpanzees do not only shape their partner's posture (22%), but also use gestural communication to initiate GHC (44%), which requires an active and synchronized response from the partner. Moreover, in a third (34%) of the GHC initiations, the requisite coordination was achieved by seemingly effortless synchrony. Lastly, using a longitudinal approach, we find that for GHC initiations, communication occurs more frequently than shaping in experienced dyads and less in mother–offspring dyads. These findings are consistent with ontogenetic ritualization, thereby reflecting first documentation of chimpanzees communicating to coordinate a cultural practice. We conclude that chimpanzees show interactional flexibility in the socio-cultural domain, opening the possibility that the interplay between communication and culture is rooted in our deep evolutionary history.

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570 Biowissenschaften, Biologie
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ISO 690GOLDSBOROUGH, Zoe, Anne Marijke SCHEL, Edwin J. C. VAN LEEUWEN, 2023. Chimpanzees communicate to coordinate a cultural practice. In: Proceedings of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2023, 290(1991), 20221754. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2022.1754
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@article{Goldsborough2023Chimp-66582,
  year={2023},
  doi={10.1098/rspb.2022.1754},
  title={Chimpanzees communicate to coordinate a cultural practice},
  number={1991},
  volume={290},
  issn={0962-8452},
  journal={Proceedings of the Royal Society of London, Series B : Biological Sciences},
  author={Goldsborough, Zoe and Schel, Anne Marijke and van Leeuwen, Edwin J. C.},
  note={Article Number: 20221754}
}
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