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When sardines disappear: tracking common dolphin, delphinus delphis, distribution responses along the western iberian coast

2025-05-26Journal article Open access
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dc.contributor.authorBrouder, Sarah
dc.contributor.authorMarques, Tiago A.
dc.contributor.authorOliveira, Nuno
dc.contributor.authorMonteiro, Pedro
dc.contributor.authorGonçalves, Jorge Manuel Santos
dc.contributor.authorMarçalo, Ana
dc.date.accessioned2025-07-24T13:31:57Z
dc.date.available2025-07-24T13:31:57Z
dc.date.issued2025-05-26
dc.description.abstractThe common dolphin, Delphinus delphis, is the most abundant cetacean species along the western Iberian Peninsula and faces many anthropogenic threats, with bycatch being the most impactful. Its preferred prey, sardine (Sardina pilchardus), has shown fluctuating abundance over the past decade, potentially influencing dolphin distribution. This study provides the first insights into common dolphin distribution along the western Iberian coast, using sighting data from vessel research surveys (2005-2020) to identify hotspot areas while accounting for monthly and seasonal distributions overlapping with sardine abundance. Common dolphin hotspots were located along the central-western and southern Portuguese mainland coasts, coinciding with important fishing ports, oceanographic features, and sardine juvenile habitats. Furthermore, during 2013-2016, common dolphins were observed significantly farther from the coast, coinciding with a period of particularly low coastal sardine biomass. However, GAM analysis indicated that the relationship between sardine biomass and the distance of common dolphins was not significant. This study highlights the major common dolphin hotspots and presents the most comprehensive temporal and distribution maps of the common dolphin along the western Iberian coast, particularly in response to sardine availability. These results can be used by managers to inform conservation measures and for the sustainable management of the Portuguese sardine purse seine fishery fleet, which interacts the most with the species.eng
dc.description.sponsorship586596-EPP-1-2017-1-IT-EPPKA1-JMD MOB; LIFE 04NAT/PT/000213; LIFE13 NAT/PT/000458; LIFE18/NAT/PT/000927
dc.identifier.doi10.3390/ani15111552
dc.identifier.issn2076-2615
dc.identifier.urihttp://hdl.handle.net/10400.1/27488
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofAnimals
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectDolphins
dc.subjectMarine ecosystem conservation
dc.subjectOpportunistic sighting data
dc.subjectPredator/ prey relationship
dc.subjectPurse seine fishery
dc.subjectSardine population dynamics
dc.subjectSpecies distribution modelling
dc.titleWhen sardines disappear: tracking common dolphin, delphinus delphis, distribution responses along the western iberian coasteng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.issue11
oaire.citation.startPage1552
oaire.citation.titleAnimal
oaire.citation.volume15
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMonteiro
person.familyNameGonçalves
person.familyNameMarçalo
person.givenNamePedro
person.givenNameJorge Manuel Santos
person.givenNameAna
person.identifier356846
person.identifierR-000-JHM
person.identifier.ciencia-id1013-ED6A-65EB
person.identifier.ciencia-id7314-E2C4-78A2
person.identifier.orcid0000-0003-1446-8256
person.identifier.orcid0000-0001-7704-8190
person.identifier.orcid0000-0002-0485-341X
person.identifier.ridD-4995-2009
person.identifier.ridG-5206-2011
person.identifier.scopus-author-id7103326116
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
relation.isAuthorOfPublication4c74d67f-e46c-4536-81d5-27a047133d95
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