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Unravelling the deep: assessing the bycatch of deep-sea elasmobranchs in crustacean bottom trawl fisheries in Portugal

2025-03Artigo científico Acesso aberto
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datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg12:Produção e Consumo Sustentáveis
datacite.subject.sdg13:Ação Climática
dc.contributor.authorDias, Ester
dc.contributor.authorMarsili, Tiago
dc.contributor.authorBarkai, Amos
dc.contributor.authorQueiroz, Nuno
dc.contributor.authorGraça Aranha Carvalho Ramos, Sofia
dc.contributor.authorPires da Rocha, Pedro
dc.contributor.authorTeodosio, Maria
dc.date.accessioned2026-04-23T10:28:52Z
dc.date.available2026-04-23T10:28:52Z
dc.date.issued2025-03
dc.description.abstractDeep-sea elasmobranchs (DSE) play a crucial role in marine ecosystems. However, they are poorly studied and face threats from overfishing, emphasizing an urgent need for improved scientific information, monitoring, and management strategies to reduce their bycatch. This study aimed to assess DSE bycatch from crustacean bottom trawling in southern Portugal, considering depths above and below 800 m (Regulation 2016/2336). Potential bycatch of deep-sea sharks was evaluated using in situ observations from the months of February and March and extrapolated for the fishing ban period (2017–2022). A total of 1559 specimens belonging to 18 DSE species were collected from 77 hauls between June 2020 and May 2022. Despite trawlers preferences for fishing above 800 m in the South, fishing below 800 m in the Southwest resulted in increased bycatch of DSE, including protected, uncommon, and endangered species such as Deania calceus, Mitsukurina owstoni, and Centroscymnus coelolepis. Furthermore, the areas and depth strata occupied by species like Galeus melastomus and Scymnodon ringens, suggested habitat flexibility, while others showed an apparent preference for specific depths and areas. These findings highlight the complexity of managing DSE populations amidst fishing pressures and depth restrictions. Despite the ban imposed to fishing below 800 m, bottom trawling persisted, leading to a potential elevated bycatch of deep-sea sharks for the months of February and March. This study emphasizes the urgency for improved enforcement of regulations in Portuguese waters and calls for the implementation of effective bycatch mitigation and fisheries management practices to safeguard DSE populations.eng
dc.description.sponsorshipSOSF 501
dc.identifier.doi10.1016/j.marpol.2024.106555
dc.identifier.issn0308-597X
dc.identifier.urihttp://hdl.handle.net/10400.1/28752
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relationNuBIAN: Nubian technology, Behavioural Innovation and Adaptation. New perspectives on Middle Stone Age technological variability and population dynamics
dc.relation.ispartofMarine Policy
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectCPUE
dc.subjectSharks
dc.subjectSkates
dc.subjectDiscards
dc.subjectSW Iberian
dc.titleUnravelling the deep: assessing the bycatch of deep-sea elasmobranchs in crustacean bottom trawl fisheries in Portugaleng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDP/04423/2020
oaire.awardNumberUIDB/04326/2020
oaire.awardNumberLA/P/0101/2020
oaire.awardNumber2021.00041.CEECIND/CP1672/CT0007
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardTitleNuBIAN: Nubian technology, Behavioural Innovation and Adaptation. New perspectives on Middle Stone Age technological variability and population dynamics
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04423%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.awardURIinfo:eu-repo/grantAgreement/FCT/CEEC IND4ed/2021.00041.CEECIND%2FCP1672%2FCT0007/PT
oaire.citation.startPage106555
oaire.citation.titleMarine Policy
oaire.citation.volume173
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamCEEC IND4ed
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameGraça Aranha Carvalho Ramos
person.familyNamePires da Rocha
person.familyNameTeodosio
person.givenNameSofia
person.givenNamePedro
person.givenNameMaria
person.identifier.ciencia-idAA1C-EB0A-3F61
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.orcid0000-0002-3664-6896
person.identifier.orcid0000-0002-6558-2860
person.identifier.orcid0000-0002-0939-9885
person.identifier.ridB-5077-2013
person.identifier.scopus-author-id56196396700
project.funder.identifierhttp://doi.org/10.13039/501100001871
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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
project.funder.nameFundação para a Ciência e a Tecnologia
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