%0 Journal Article %A Prieur, Jacques %A Pika, Simone %A Blois-Heulin, Catherine %A Barbu, Stéphanie %+ Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society %T Captive chimpanzees’ manual laterality in tool use context: Influence of communication and of sociodemographic factors : %U https://hdl.handle.net/21.11116/0000-0002-B90C-1 %R 10.1016/j.beproc.2018.04.009 %7 2018-04-14 %D 2018 %* Review method: peer-reviewed %X Understanding variations of apes’ laterality between activities is a central issue when investigating the evolutionary origins of human hemispheric specialization of manual functions and language. We assessed laterality of 39 chimpanzees in a non-communication action similar to termite fishing that we compared with data on five frequent conspecific-directed gestures involving a tool previously exploited in the same subjects. We evaluated, first, population-level manual laterality for tool-use in non-communication actions; second, the influence of sociodemographic factors (age, sex, group, and hierarchy) on manual laterality in both non-communication actions and gestures. No significant right-hand bias at the population level was found for non-communication tool use, contrary to our previous findings for gestures involving a tool. A multifactorial analysis revealed that hierarchy and age particularly modulated manual laterality. Dominants and immatures were more right-handed when using a tool in gestures than in non-communication actions. On the contrary, subordinates, adolescents, young and mature adults as well as males were more right-handed when using a tool in non-communication actions than in gestures. Our findings support the hypothesis that some primate species may have a specific left-hemisphere processing gestures distinct from the cerebral system processing non-communication manual actions and to partly support the tool use hypothesis. %K Gestures, Hemispheric lateralization, Intraspecific communication, Object manipulations %J Behavioural Processes %V 157 %& 610 %P 610 - 624 %I Elsevier %@ 0376-6357