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dc.contributor.authorKeenan, Sumir
dc.contributor.authorMathevon, Nicolas
dc.contributor.authorStevens, Jeroen M.G.
dc.contributor.authorNicolè, Florence
dc.contributor.authorZuberbühler, Klaus
dc.contributor.authorGuéry, Jean Pascal
dc.contributor.authorLevréro, Florence
dc.identifier.citationKeenan , S , Mathevon , N , Stevens , J M G , Nicolè , F , Zuberbühler , K , Guéry , J P & Levréro , F 2020 , ' The reliability of individual vocal signature varies across the bonobo's graded repertoire ' , Animal Behaviour , vol. 169 , pp. 9-21 .
dc.identifier.otherPURE: 270597061
dc.identifier.otherPURE UUID: d39b9813-6026-483a-bf83-b414114ebd70
dc.identifier.otherScopus: 85091665840
dc.identifier.otherORCID: /0000-0001-8378-088X/work/81797328
dc.identifier.otherWOS: 000585940300002
dc.descriptionFunding: We thank the French Ministère de l’Enseignement Supérieur et de la Recherche (Ph.D. grant to S.K.), the Université de Saint-Etienne (research sabbaticals to F.L. and N.M., visiting professorship to K.Z. and research funding), the European Research Council (K.Z. grant PRILANG 283871), Institut universitaire de France (NM) and the Labex CeLyA.en
dc.description.abstractVocalizations often contain both ‘dynamic’ information, related to short-term fluctuations in the individual's emotional states, and ‘static’ information, related to long-term attributes such as age, sex, weight and body size which define an ‘individual vocal signature’. While both types of information may be of functional value to receivers, dynamic information requires acoustic versatility, while static information depends on acoustic stability. Here we investigated whether an individual vocal signature is present across the vocal repertoire of the bonobo, Pan paniscus. First, the analysis of the acoustic structure of its five most common tonal vocalizations emphasized the highly graded structure of its repertoire. We then evaluated the reliability of identity information across these call types. The results show that, while all call types supported information related to identity, the reliability of these vocal signatures was not consistent along the graded vocal continuum. Caller identity was strongly encoded at one end of the acoustic gradation (high-hoot) and decreased from bark, soft bark, peep-yelp to peep calls. Strikingly, the reliability of the individual signature thus decreased from calls used in high-arousal contexts to those used in low-arousal contexts. To the best of our knowledge, this is the first demonstration that an acoustic gradation that codes for ‘dynamic’ information can be accompanied by variation in the ‘static’ information that supports vocal individuality.
dc.relation.ispartofAnimal Behaviouren
dc.rightsCopyright © 2020 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectAcoustic gradingen
dc.subjectIdentity informationen
dc.subjectIndividual vocal signatureen
dc.subjectQL Zoologyen
dc.subjectEcology, Evolution, Behavior and Systematicsen
dc.subjectAnimal Science and Zoologyen
dc.titleThe reliability of individual vocal signature varies across the bonobo's graded repertoireen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Psychology and Neuroscienceen
dc.contributor.institutionUniversity of St Andrews. Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews. Centre for Social Learning & Cognitive Evolutionen
dc.description.statusPeer revieweden

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