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Social structure of a population of bottlenose dolphins (Tursiops truncatus) in the oceanic archipelago of Madeira, Portugal

2017Journal article Open access
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dc.contributor.authorDinis, Ana
dc.contributor.authorAlves, Filipe
dc.contributor.authorNicolau, Cátia
dc.contributor.authorRibeiro, Cláudia
dc.contributor.authorKaufmann, Manfred
dc.contributor.authorCañadas, Ana
dc.contributor.authorFreitas, Luís
dc.date.accessioned2021-10-06T07:51:15Z
dc.date.available2021-10-06T07:51:15Z
dc.date.issued2017
dc.description.abstractIn order to investigate social structure, 11 years of individual photo-identification data of bottlenose dolphin were analysed. We examined the type of association indices between pairs of identified individuals; the patterns of affiliation between indi vidual dolphins and the probabilities of association between individuals over time. Between 2001 and 2012, there were 272 encounters which resulted in the identification of 501 individuals. The discovery curve resulting from the photo-identification analysis indicated an open population with regular recruitment of new individuals. All individuals were found to be asso ciated at an association index of ,0.05. A total of 291 individuals recorded from 2004 to 2012 were used to assess the tem poral pattern of the social structure. The model fit to the Standardized Lagged Association Rate (SLAR) that best described the studied bottlenose dolphin population was ‘casual acquaintances’, and the analysis of associations over time showed a decreasing SLAR curve that falls until reaching the null rate, confirming random associations. The decline of the SLAR curve after 500 days (1.4 years) suggests disassociation over that time period which can be explained by demographic events such as mortality or emigration. In an open ocean habitat like Madeira this is not unexpected, as there are neither geographic boundaries nor enclosed environments. This population presented a dynamic and fluctuating social structure, where groups change in size and composition. In future conservation efforts this population should be considered as one large community, where individuals associate, disassociate and reassociate with each other over time.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDinis, A., Alves, F., Nicolau, C., Ribeiro, C., Kaufmann, M., Cañadas, A., & Freitas, L. (2018). Social structure of a population of bottlenose dolphins (Tursiops truncatus) in the oceanic archipelago of Madeira, Portugal. Journal of the Marine Biological Association of the United Kingdom, 98(5), 1141-1149. https://doi.org/10.1017/S0025315417000650pt_PT
dc.identifier.doi10.1017/S0025315417000650pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3697
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherCambridge University Presspt_PT
dc.relationGOLFINICHO - Ecological niche partitioning between two species of dolphins around the Azores and Madeira
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectBottlenose dolphinspt_PT
dc.subjectPhoto-identificationpt_PT
dc.subjectAssociationspt_PT
dc.subjectFission-fusionpt_PT
dc.subjectNE Atlanticpt_PT
dc.subjectMadeira (Portugal)pt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleSocial structure of a population of bottlenose dolphins (Tursiops truncatus) in the oceanic archipelago of Madeira, Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleGOLFINICHO - Ecological niche partitioning between two species of dolphins around the Azores and Madeira
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FBIA-BDE%2F61009%2F2004/PT
oaire.citation.endPage1149pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage1141pt_PT
oaire.citation.titleJournal of the Marine Biological Association of the United Kingdompt_PT
oaire.citation.volume98pt_PT
oaire.fundingStreamPOCI
person.familyNameDinis
person.familyNameAlves
person.familyNameKaufmann
person.givenNameAna
person.givenNameFilipe
person.givenNameManfred
person.identifier.ciencia-id0412-30C5-4376
person.identifier.ciencia-id1F1F-08D6-E54D
person.identifier.ciencia-idA316-A34A-F7AF
person.identifier.orcid0000-0002-1508-9197
person.identifier.orcid0000-0003-3752-2745
person.identifier.orcid0000-0001-6213-3229
person.identifier.ridA-7561-2013
person.identifier.scopus-author-id26665393900
person.identifier.scopus-author-id35264346100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication9c527011-ab5e-495f-8efd-ded8ae27cc8a
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