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Sea turtles in the Atlantic and Indian Oceans, a step towards understanding bycatch and management of these species in tuna fisheries

2025-02Journal article Restricted access
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dc.contributor.authorDomingo, Andrés
dc.contributor.authorBaéz, José Carlos
dc.contributor.authorMiller, Philip
dc.contributor.authorParker, Denham
dc.contributor.authorRamos, María Lourdes
dc.contributor.authorSabarros, Philippe S.
dc.contributor.authorBrown, Craig
dc.contributor.authorCamiñas, Juan Antonio
dc.contributor.authorCoelho, Rui
dc.contributor.authorForselledo, Rodrigo
dc.contributor.authorFiedler, Fernando Niemeyer
dc.contributor.authorGiffoni, Bruno
dc.contributor.authorMacías, David
dc.contributor.authorHanke, Alex
dc.contributor.authorKerwath, Sven
dc.contributor.authorLauretta, Matthew V.
dc.contributor.authorPoisson, Francois
dc.contributor.authorRueda, Lucía
dc.contributor.authorRuiz, Jon
dc.contributor.authorSales, Gilberto
dc.contributor.authorLeite, Nilamon de Oliveira
dc.contributor.authorSalmerón, Francisca
dc.contributor.authorSantiago, Josu
dc.contributor.authorTaylor, Nathan
dc.contributor.authorJiménez, Sebastián
dc.date.accessioned2025-02-11T13:22:11Z
dc.date.available2025-02-11T13:22:11Z
dc.date.issued2025-02
dc.description.abstractKnowledge of the spatiotemporal behavior and interactions with fishing gear of bycatch species is essential to improve conservation and fisheries management strategies. We analyze fine-scale data from onboard observers, covering 25 fishing fleets from 2002 through 2018, to assess temporal trends and spatial variation in sea turtle bycatch in longline and purse seine tuna fisheries in the Atlantic and Indian oceans. For the spatial analysis, we used the latest Regional Management Units for Sea Turtles (RMUs). In 117,381 fishing sets (51,431 in longlines and 65,950 in purse seine), a total of 26,050 sea turtles were incidentally caught. Bycatch was significantly higher in the Atlantic than in the Indian Ocean. Some bycatch trends were observed in longline fisheries but should be interpreted with caution due to low observer coverage and uneven sampling. In purse seine fisheries, where observer coverage was higher, an increasing trend over time was found in the bycatch rate of the three most caught species during the study period. This could be related to an increase in population size as suggested in other regional-scale analyses. We identified RMUs that should receive further attention from the perspective of increased capture rates over time. Our large-scale analysis confirms that surface longline sets capture significantly more turtles than deep longline sets. Purse seine sets on fish aggregating objects (FOB) captured more turtles than sets made on free schools of fish. These results are of relevance for the management and protection of these threatened species and the development of management measures.eng
dc.description.sponsorshipGrant Agreement no. SI2.839159;
dc.identifier.doi10.1016/j.biocon.2025.110966
dc.identifier.issn0006-3207
dc.identifier.urihttp://hdl.handle.net/10400.1/26775
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofBiological Conservation
dc.rights.uriN/A
dc.subjectSea turtles
dc.subjectAtlantic Ocean Indian Ocean
dc.subjectLongline
dc.subjectPurse seine
dc.subjectBycatch management
dc.titleSea turtles in the Atlantic and Indian Oceans, a step towards understanding bycatch and management of these species in tuna fisherieseng
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/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.startPage110966
oaire.citation.titleBiological Conservation
oaire.citation.volume302
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCoelho
person.givenNameRui
person.identifier134638
person.identifier.ciencia-idDC1A-20B7-EAC0
person.identifier.orcid0000-0003-3813-5157
person.identifier.ridC-1163-2008
person.identifier.scopus-author-id56257111100
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.isAuthorOfPublication6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isAuthorOfPublication.latestForDiscovery6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isProjectOfPublicationfafa76a6-2cd2-4a6d-a3c9-772f34d3b91f
relation.isProjectOfPublication15f91d45-e070-47d8-b6b8-efd4de31d9a8
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relation.isProjectOfPublication.latestForDiscoveryfafa76a6-2cd2-4a6d-a3c9-772f34d3b91f

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