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Brays and bits: Information theory applied to acoustic communication sequences of bottlenose dolphins

2018-03Journal article Restricted access
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dc.contributor.authorLuís, Ana Rita
dc.contributor.authorAlves, Inês Sofia Carvalho Alves
dc.contributor.authorSobreira, Filipa Veiga
dc.contributor.authorCouchinho, Miguel Nogueira
dc.contributor.authorSantos, Manuel Eduardo dos
dc.date.accessioned2018-07-05T13:31:16Z
dc.date.available2018-07-05T13:31:16Z
dc.date.issued2018-03
dc.description.abstractAcoustic call sequences are important components of vocal repertoires for many animal species. Bottlenose dolphins (Tursiops truncatus) produce a wide variety of vocalizations, in different behavioural contexts, including some conspicuous vocal sequences – the ‘bray series’. The occurrence of brays is still insufficiently documented, contextually and geographically, and the specific functions of these multi-unit emissions are yet to be understood. Here, acoustic emissions produced by bottlenose dolphins in the Sado estuary, Portugal, were used to provide a structural characterization of the discrete elements that compose the bray series. Information theory techniques were applied to analyse bray sequences and explore the complexity of these calls. Log-frequency analysis, based on bout criterion interval, confirmed the bout structure of the bray series. A first-order Markov model revealed a distinct pattern of emission for the bray series’ elements, with uneven transitions between elements. The order in these sequential emissions was not random and consecutive decreases in higher order entropy values support the notion of a well-defined structure in the bray series. The key features of animal signal sequences here portrayed suggest the presence of relevant information content and highlight the complexity of the bottlenose dolphin’s acoustic repertoire.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBioacoustics, (S.i.), 1-11. Doi: 10.1080/09524622.2018.1443285pt_PT
dc.identifier.doi10.1080/09524622.2018.1443285pt_PT
dc.identifier.issn0952-4622
dc.identifier.urihttp://hdl.handle.net/10400.12/6476
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.relationSFRH/ BD/90037/2012pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectAcoustic communicationpt_PT
dc.subjectVocal sequencespt_PT
dc.subjectBray seriespt_PT
dc.subjectInformation theorypt_PT
dc.subjectTursiopspt_PT
dc.subjectTruncatuspt_PT
dc.subjectBottlenose dolphinpt_PT
dc.titleBrays and bits: Information theory applied to acoustic communication sequences of bottlenose dolphinspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceUnited Kingdompt_PT
oaire.citation.endPage11pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleBioacousticspt_PT
person.familyNamede Noronha Gamito Afonso dos Santos
person.givenNameManuel Eduardo
person.identifier.ciencia-id4E18-0CBD-48E0
person.identifier.orcid0000-0001-8225-9398
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationb7ab5e0d-61c3-4044-9cb5-73bdb6ed372d
relation.isAuthorOfPublication.latestForDiscoveryb7ab5e0d-61c3-4044-9cb5-73bdb6ed372d

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