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Spatial and temporal distribution of bottlenose dolphins, Tursiops truncatus, in the Madeira archipelago, NE Atlantic

2016Journal article Open access
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dc.contributor.authorDinis, Ana
dc.contributor.authorCarvalho, A.
dc.contributor.authorAlves, F.
dc.contributor.authorNicolau, C.
dc.contributor.authorRibeiro, C.
dc.contributor.authorKaufmann, M.
dc.contributor.authorCañadas, A.
dc.contributor.authorFreitas, L.
dc.date.accessioned2021-10-06T10:49:11Z
dc.date.available2021-10-06T10:49:11Z
dc.date.issued2016
dc.description.abstractOne of the first steps in understanding the relationships between populations and their habitats is to determine which areas they use with higher frequency. This study used systematic and non-systematic survey data from 2001-2002 and 2004-2012 to determine encounter rates and investigate temporal and spatial distribution of bottlenose dolphins around Madeira, Desertas and Porto Santo islands. A total 24,914 km of search effort was carried out and 199 sightings were recorded. Highest encounter rates were found off the east coast of Madeira and off Porto Santo. Moreover, higher encounter rates occurred over bathymetries ranging between 500-1,000 m during systematic surveys whereas in non systematic surveys relative high encounter rates were found in depths of 2,000-2,500m. Most dolphins were found to be distributed in depths <1,000m and at no more than 10 km offshore indicating a preference for shallower waters. Dolphins were sighted during the whole year and there were no significant differences in encounter rate between months. These results suggest the existence of preferential areas for this species based on static bathymetric features. The fact that the dolphins prefer inshore areas that are more exposed to anthropogenic activities should be taken into account when discussing bottlenose dolphin conservation measures in the Madeira archipelago.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDinis, A., Carvalho, A., Alves, F., Nicolau, C., Ribeiro, C., Kaufmann, M., ... & Freitas, L. (2016). Spatial and temporal distribution of bottlenose dolphins, Tursiops truncatus, in the Madeira archipelago, NE Atlantic. Arquipélago-Life and Marine Sciences, 33, 45-54.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3700
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherUniversidade dos Açorespt_PT
dc.relationGOLFINICHO - Ecological niche partitioning between two species of dolphins around the Azores and Madeira
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBottlenose dolphinspt_PT
dc.subjectConservationpt_PT
dc.subjectNautical surveyspt_PT
dc.subjectPhysiographic variablespt_PT
dc.subjectSpatio-temporal occurrencept_PT
dc.subjectMadeira archipelago (Portugal)pt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleSpatial and temporal distribution of bottlenose dolphins, Tursiops truncatus, in the Madeira archipelago, NE Atlanticpt_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.conferencePlaceAçores (Portugal)pt_PT
oaire.citation.endPage54pt_PT
oaire.citation.startPage45pt_PT
oaire.citation.titleArquipélago-Life and Marine Sciencespt_PT
oaire.citation.volume33pt_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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