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Interactions between the common dolphin, Delphinus delphis, and the Portuguese purse seine fishery over a period of 15 years (2003–2018)

dc.contributor.authorDias, Inês C.
dc.contributor.authorMarçalo, Ana
dc.contributor.authorFeijó, Diana
dc.contributor.authorDomingos, Isabel
dc.contributor.authorSilva, Alexandra A.
dc.date.accessioned2022-09-28T09:17:38Z
dc.date.available2022-09-28T09:17:38Z
dc.date.issued2022
dc.description.abstractInteractions between cetaceans and the purse seine fishery in coastal waters of mainland Portugal were investigated using onboard observations over a period of 15 years (2003-2018). In 10% of the fishing sets, there were interactions with one of three species of cetaceans: common dolphin (Delphinus delphis), bottlenose dolphin (Tursiops truncatus), and harbour porpoise (Phocoena phocoena). The common dolphin was the most frequently observed species, occurring in 89% of all interaction events, and the only species with observed mortality. Therefore, this study focused only on the interactions with common dolphins. A generalized additive model (GAM) was applied to observer data to investigate how the fishing activity and the abundance of small pelagic fish influenced the probability of occurrence of interactions between the common dolphin and the purse seine fishery between 2003 and 2018. The results revealed significant annual and geographic variation in the occurrence of interactions, and a significant influence of fishing effort and catch per unit effort of sardine (Sardina pilchardus). A second GAM in a hurdle model was used to model the number of common dolphins that interacted with the fishing activity as a function of fishing seasonality and the local abundance of pelagic fish. There was a significant effect of the seasonality of the fishing activity and catch per unit effort of sardine and chub mackerel (Scomber colias) on the number of common dolphins interacting with the fishery. The results of this study suggest that the probability of interactions and the number of common dolphins interacting with the fishery were affected by the local abundance of sardine and chub mackerel. As the common dolphin population appears to be increasing in the study area, the risk of by-catch also increases, thus the monitoring of the Portuguese purse seine fishery is important to inform the implementation of management plans, and also as a response to global efforts for sustainable fisheries and marine mammal conservation.pt_PT
dc.description.sponsorshipMAR-01.04.02-FEAMP-0009; NAT/PT/00038
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/aqc.3828pt_PT
dc.identifier.issn1052-7613
dc.identifier.urihttp://hdl.handle.net/10400.1/18314
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationINTERACÇÕES DA PESCA DE CERCO COM POPULAÇÕES DE PEQUENOS CETÁCEOS NA COSTA PORTUGUESA
dc.relationMarine and Environmental Sciences Centre
dc.relationAlgarve Centre for Marine Sciences
dc.subjectAccidental capturept_PT
dc.subjectCetaceanspt_PT
dc.subjectCommon dolphinpt_PT
dc.subjectDelphinus delphispt_PT
dc.subjectPurse seine fisherypt_PT
dc.titleInteractions between the common dolphin, Delphinus delphis, and the Portuguese purse seine fishery over a period of 15 years (2003–2018)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleINTERACÇÕES DA PESCA DE CERCO COM POPULAÇÕES DE PEQUENOS CETÁCEOS NA COSTA PORTUGUESA
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBPD%2F64889%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.citation.endPage1364pt_PT
oaire.citation.issue8pt_PT
oaire.citation.startPage1351pt_PT
oaire.citation.titleAquatic Conservation: Marine and Freshwater Ecosystemspt_PT
oaire.citation.volume32pt_PT
oaire.fundingStreamFARH
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMarçalo
person.givenNameAna
person.identifierR-000-JHM
person.identifier.ciencia-id7314-E2C4-78A2
person.identifier.orcid0000-0002-0485-341X
person.identifier.scopus-author-id6505855915
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7a0927c2-77ac-4512-9dae-a34da3f490e9
relation.isAuthorOfPublication.latestForDiscovery7a0927c2-77ac-4512-9dae-a34da3f490e9
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