Metacommunication in social play: the meaning of aggression-like elements is modified by play face in Hanuman langurs (Semnopithecus entellus)

In: Behaviour
Marek Špinka aDepartment of Ethology, Institute of Animal Science, 104 00 Prague, Czech Republic

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Marie Palečková bDepartment of Zoology, Faculty of Science, Charles University, Viničná 7, 128 00 Prague, Czech Republic

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Milada Řeháková cZoo Ústí nad Labem, Drážd’anská 23, 400 07 Ústí nad Labem, Czech Republic
dTarsius, o.s., Na Pěšině 267, 40505 Děčín, Czech Republic

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The metacommunication hypothesis asserts that some elements of play behaviour are associated with play elements borrowed from aggression and interpret these aggression-like elements as playful. Using data from free living Hanuman langurs (Semnopithecus entellus), we tested three predictions that follow from the metacommunication hypothesis: (i) aggression-like elements (ALEs) abbreviate play bouts; (ii) candidate signal elements are sequentially associated with ALEs; (iii) associations of candidate signal elements with ALEs prolong play bouts. Play face and five other candidate signal elements were evaluated in relation to nine ALEs. We confirmed all three predictions for play face, albeit only if the play face and/or the ALEs occurred at the start of the play bout. The other candidate elements were not associated with ALEs. We conclude that play face fulfils the metacommunicatory function in Hanuman langur play bouts, while other play specific elements may serve other signal or non-signal functions.

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