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The shape of lipsmacking: socio-emotional regulation in bearded capuchin monkeys (Sapajus libidinosus).


ABSTRACT: Capuchin monkeys have rich social relationships and from very young ages they participate in complex interactions with members of their group. Lipsmacking behaviour, which involves at least two individuals in socially mediated interactions, may tell about processes that maintain, accentuate or attenuate emotional exchanges in monkeys. Lipsmacking is a facial expression associated with the establishment and maintenance of affiliative interactions, following under the 'emotional regulation' umbrella, which accounts for the ability to manage behavioural responses. We investigated behaviours related to the emitter and to the receiver (infant) of lipsmacking to answer the question of how lipsmacking occurs. In capuchin monkeys, lipsmacking has been previously understood solely as a face-to-face interaction. Our data show that emitters are engaged with infants, looking longer towards their face and seeking eye contact during the display. However, receivers spend most of the time looking away from the emitter and stay in no contact for nearly half of the time. From naturalistic observations of wild infant capuchin monkeys from Brazil we found that lipsmacking is not restricted to mutual gaze, meaning there are other mechanisms in place than previously known. Our results open paths to new insights about the evolution of socio-emotional displays in primates.

SUBMITTER: Albuquerque N 

PROVIDER: S-EPMC10426065 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature

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The shape of lipsmacking: socio-emotional regulation in bearded capuchin monkeys (<i>Sapajus libidinosus</i>).

Albuquerque Natalia N   Savalli Carine C   Belli Marina M   Varella Ana Clara AC   Felício Beatriz B   França Juliana J   Izar Patrícia P  

Evolutionary human sciences 20230512


Capuchin monkeys have rich social relationships and from very young ages they participate in complex interactions with members of their group. Lipsmacking behaviour, which involves at least two individuals in socially mediated interactions, may tell about processes that maintain, accentuate or attenuate emotional exchanges in monkeys. Lipsmacking is a facial expression associated with the establishment and maintenance of affiliative interactions, following under the 'emotional regulation' umbrel  ...[more]

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