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Experimental anthropogenic food restrictions drive short-term foraging and immuno-haematological changes in sympatric breeding gulls

2025-11Artigo científico Acesso aberto
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datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg15:Proteger a Vida Terrestre
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorPereira, Jorge M.
dc.contributor.authorRamos, Jaime A.
dc.contributor.authorDomingues, Adriana
dc.contributor.authorAlmeida, Ana
dc.contributor.authorMarçalo, Ana
dc.contributor.authorCascão, Catarina
dc.contributor.authorSilva, Carlos
dc.contributor.authorRey, Daniel
dc.contributor.authorCeia, Filipe R.
dc.contributor.authorCarvalho, Flávia
dc.contributor.authorSantos, Ivo dos
dc.contributor.authorGonçalves, Jorge Manuel Santos
dc.contributor.authorCerveira, Lara R.
dc.contributor.authorFrade, Magda
dc.contributor.authorLaranjeiro, Maria I.
dc.contributor.authorOliveira, Nuno
dc.contributor.authorNascimento, Tânia
dc.contributor.authorPaiva, Vítor H.
dc.contributor.authorNorte, Ana C.
dc.date.accessioned2026-03-18T13:47:04Z
dc.date.available2026-03-18T13:47:04Z
dc.date.issued2025-11
dc.description.abstractFishery discards and landfills provide major subsidies to scavenging seabirds, shaping their foraging behaviour and population dynamics. However, few studies have compared the behaviour and health of individuals with and without access to such predictable anthropogenic food subsidies (PAFS). We assessed the foraging behaviour and immuno-haematological condition of incubating Audouin's (Ichthyaetus audouinii) and yellow-legged gulls (Larus michahellis) in response to an experimental restriction of access to fisheries and landfill food subsidies in southern Portugal. In response to food restrictions, gulls from both species increased their foraging distance from the colony, likely relying on alternative prey, and/or foraging in association with other fishing fleets in Portuguese or nearby Spanish waters. This was supported by a decrease in the number of yellow-legged gulls observed at both the landfill and the Culatra fishing harbour during the food restriction trials. These changes were followed by alterations in the leucocyte profiles of yellow-legged gulls, characterised by a predominance of heterophils over lymphocytes, i.e. an indicator of physiological stress. Our findings show that limited access to PAFS can influence gulls' foraging behaviour and physiological condition, highlighting their reliance/dependence on these predictable subsidies. These short-term responses suggest that PAFS may function as ecological traps for opportunistic seabirds during the breeding period. Understanding such responses is critical to predict long-term ecological consequences and to develop waste and fisheries management policies aligned with EU strategies.eng
dc.description.sponsorship2022.07032.CEECIND/CP1714/CT0009; CEECIND/CP1656/CT0014; DL57/2016/CP1370/CT89
dc.identifier.doi10.1016/j.scitotenv.2025.180672
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10400.1/28471
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationMarine and Environmental Sciences Centre
dc.relationMarine and Environmental Sciences Centre
dc.relationAquatic Research Infrastructure Network
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofScience of The Total Environment
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAudouin's gull
dc.subjectForaging effort
dc.subjectPhysiological condition
dc.titleExperimental anthropogenic food restrictions drive short-term foraging and immuno-haematological changes in sympatric breeding gullseng
dc.typejournal article
dspace.entity.typePublication
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oaire.awardNumberLA/P/0101/2020
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.startPage180672
oaire.citation.titleScience of the Total Environment
oaire.citation.volume1003
oaire.fundingStream6817 - DCRRNI ID
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oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMarçalo
person.familyNameCarvalho
person.familyNameGonçalves
person.familyNameFrade
person.givenNameAna
person.givenNameFlávia
person.givenNameJorge Manuel Santos
person.givenNameMagda
person.identifierR-000-JHM
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person.identifier.ciencia-id1013-ED6A-65EB
person.identifier.orcid0000-0002-0485-341X
person.identifier.orcid0009-0001-2751-7689
person.identifier.orcid0000-0001-7704-8190
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person.identifier.ridG-5206-2011
person.identifier.scopus-author-id6505855915
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project.funder.nameFundação para a Ciência e a Tecnologia
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