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Dolphin whistle repertoires around São Miguel (Azores) : Are you common or spotted?

2020-04Journal article Restricted access
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dc.contributor.authorGannier, Alexandre
dc.contributor.authorFuchs, Sandra
dc.contributor.authorGannier, Adrien
dc.contributor.authorFernandez, Marc
dc.contributor.authorAzevedo, José M. N.
dc.date.accessioned2021-05-19T16:01:53Z
dc.date.available2021-05-19T16:01:53Z
dc.date.issued2020-04
dc.description.abstractShort-beaked common dolphins (Delphinus delphis) and Atlantic spotted dolphins (Stenella frontalis) are both common in the Azores archipelago during summer. Because both species are sympatric, at least in part of their range, they may use acoustic features to recognize conspecifics and maintain school cohesion throughout their different activities. Delphinid whistles were recorded with a 96-kHz sampling rate using towed hydrophone system during surveys held in summer of 2013 and 2014 around São Miguel Island (Azores, Portugal). A total of 256 whistles attributed to either short-beaked common dolphin (n = 133) or Atlantic spotted dolphin (n = 123) were selected and processed with a contour extraction software. Elementary statistical analysis showed that duration, frequency and slope variables were significantly different for both species, although in most cases their range overlapped. We performed a discriminant analysis to test species classification: the dataset was randomly split into one calibration subset (186 whistles) and one validation subset (70 whistles). The discriminant analysis retained four variables (global slope, duration, minimal and final frequencies) as useful for classification. The discriminant function resulted in correct classification rates of 78.5% (calibration subset) and 81.4% (validation subset). Common dolphin whistles were better classified than Atlantic spotted dolphin whistles (83.4% and 74.8%) respectively. This study shows that reliable species identification can be achieved for common and spotted dolphins using their whistle repertoire characteristics.en
dc.description.sponsorshipFundo Regional para a Ciência e Technologia (Azores Government) M3.1.2/F/028/2011.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGannier, A., Fuchs, S., Gannier, A., Fernandez, M. & Azevedo, J.M. (2020). Dolphin whistle repertoires around São Miguel (Azores): are you common or spotted? "Applied Acoustics", 161, 107169. DOI:10.1016/j.apacoust.2019.107169en
dc.identifier.doi10.1016/j.apacoust.2019.107169pt_PT
dc.identifier.issn0003-682X
dc.identifier.urihttp://hdl.handle.net/10400.3/5918
dc.identifier.wos000513986000007
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/abs/pii/S0003682X16305394#!pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectWhistlesen
dc.subjectDolphinsen
dc.subjectSpectrogramen
dc.subjectClassificationen
dc.subjectAtlantic Oceanen
dc.titleDolphin whistle repertoires around São Miguel (Azores) : Are you common or spotted?pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceUnited Kingdomen
oaire.citation.endPage9pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleApplied Acousticsen
oaire.citation.volume161pt_PT
person.familyNameFernandez Morron
person.familyNameAzevedo
person.givenNameMarc
person.givenNameJosé
person.identifier.ciencia-id691B-40D8-24D2
person.identifier.ciencia-id8312-087E-A33C
person.identifier.orcid0000-0002-8419-0942
person.identifier.orcid0000-0003-2573-1371
person.identifier.ridC-1504-2010
person.identifier.scopus-author-id55463168300
person.identifier.scopus-author-id7101722234
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationebe4b6e7-65f3-4b6d-8385-2f649bd12518
relation.isAuthorOfPublicationba383324-3114-4d75-a772-dc6c83d33fb2
relation.isAuthorOfPublication.latestForDiscoveryba383324-3114-4d75-a772-dc6c83d33fb2

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