Flexibility and context specificity of communicative rhythmic behaviours in chimpanzees

Gabriela-Alina Sauciuc, Jagoda Zlakowska, Karl Johan Klang, Tomas Persson

Forskningsoutput: KonferensbidragKonferensabstractPeer review


Rhythmic behaviors (in short RBs), such as applauding, dancing or rocking a baby to sleep are part of humans everyday life. Recently there has been a growing interest in the RBs of other species, as a way of tracking the evolutionary roots of human musicality. RBs have been initially studied in arthropods, insects, anurans and songbirds, where a single behaviour is tied to reproductive function. Emergent evidence shows that this connection extends to some mammalian species as well. Very little is known, however, about the presence of RBs and their likely adaptive significance in our closest genetic relatives - the chimpanzees (Pan troglodytes). Evidence is limited to mentions of rocking during courtship, or as abnormal behaviour in captivity, and to descriptions of so-called “buttress drumming”. This “drumming”, whose function remains controversial, is very different from musical rhythmicity, as it is aperiodic, and results typically from 2-5 foot stomps on a resonant surface.To address the absence of data on chimpanzee RBs and their likely functional relevance, we conducted an observational study, and recorded RBs in the contexts in which they occurred. One aim of this study was to examine the context specificity of RBs in chimpanzees, i.e. to investigate if particular RBs are context-bound, thus having a specific function (e.g. facilitating reproduction like in other species) or if they are flexibly presented in a variety of contexts, without being obligatory in one specific context. Observations were collected from 4 chimpanzee groups housed at Lund University Primate Research Station Furuvik, Sweden (61 h) and MONA Foundation, Spain (57,5 h). Preliminary results suggest that RBs are frequent in chimpanzees, i.e. in the currently analysed data subset consisting of 18,5 observation hours from Furuvik we recorded 262 bouts, of which 246 were constituted by one of 7 highly frequent RB. An RB x Context chi-square test showed that RBs types were not independent from contexts (χ2= 548, df = 64, P < 0.001). Two RBs showed context exclusivity (p < 0.01, binomial test): teeth clacking (N=30) occurred only during grooming, and copulatory display (N=14) occurred only during courtship. One RB - surface hitting (N=31) - was primarily used for initiation of social interaction (p < 0.05, binomial test). Four additional RBs that occurred frequently (≥ 19) were not tied to a specific context. Overall, the RB exhibited by chimpanzees appeared to accomplish a communicative purpose.
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StatusPublished - 2019 nov 22
EvenemangAspects of Neuroscience - University of Warsaw, Warsaw, Polen
Varaktighet: 2019 nov 222019 nov 24
Konferensnummer: 09


KonferensAspects of Neuroscience

Ämnesklassifikation (UKÄ)

  • Etologi
  • Psykologi (exklusive tillämpad psykologi)
  • Musikvetenskap


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