English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Gestural development of chimpanzees in the wild: The impact of interactional experience

MPS-Authors
/persons/resource/persons73044

Wittig,  Roman M.
Chimpanzees, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;

/persons/resource/persons72904

Pika,  Simone
Linguistic and Cultural Evolution, Max Planck Institute for the Science of Human History, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Fröhlich, M., Müller, G., Zeiträg, C., Wittig, R. M., & Pika, S. (2017). Gestural development of chimpanzees in the wild: The impact of interactional experience. Animal Behaviour, 134, 271-282. doi:10.1016/j.anbehav.2016.12.018.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-7B8C-8
Abstract
To understand the complexity involved in animal signalling, studies have mainly focused on repertoire size and information conveyed in vocalizations of birds and nonhuman primates. However, recent studies on gestural abilities of nonhuman primates have shown that we also need a detailed understanding of other communicative modalities and underlying cognitive skills to grasp this phenomenon in detail. Here, we thus examined gestural signalling of chimpanzees, Pan troglodytes, living in two communities in the wild (Kanyawara, Uganda; Taï South, Côte d'Ivoire) with a special focus on the influence of the social environment on signal development. Specifically, we investigated to what extent specific social factors, namely behavioural context, interaction rates and maternal proximity, affect gestural production (i.e. gesture frequency, sequences and repertoire size). We used a combination of video recordings and focal scans obtained from 11 infants aged between 9 and 69 months during 1145 h of observation throughout two consecutive field periods. Overall, we found that social play was the context in which the highest number of gestures occurred. While gesture frequency and repertoire size increased with higher interaction rates with nonmaternal conspecifics and the number of previous interaction partners, no effect was found for interaction rates with mothers. Our results thus imply that infants of social mothers may have a head start in life. Moreover, we provide hitherto undocumented evidence for sex differences in gestural signalling, which may reflect the differential importance of early socialization for chimpanzee males and females. Gestural development thus relies heavily on interactional experiences with conspecifics, which adds support for gestural acquisition via the learning mechanism of ‘social negotiation’ in great apes.