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Integrating prey monitoring and stable isotope analysis to assess the diet of Octopus vulgaris in Portuguese coastal water

2026-01-13Artigo científico Acesso aberto
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dc.contributor.authorSeixas, Sónia
dc.contributor.authorBaeta, Alexandra
dc.contributor.authorMarques, João Carlos
dc.date.accessioned2026-02-24T15:00:37Z
dc.date.available2026-02-24T15:00:37Z
dc.date.issued2026-01-13
dc.description.abstractThis study explores the feeding ecology of Octopus vulgaris in the Cascais region through a combined approach of long-term prey monitoring and stable isotope analysis. Over several months, we worked with local fishermen to observe and record prey items found in octopus pots and those carried by octopuses at the time of capture. These field observations enabled the identification of key prey species, which were subsequently analysed isotopically to estimate their contribution to the octopus diet. The results show that Atrina fragilis is the main prey, making up about 70 %, followed by Polybius henslowii (18 %), with Cymbium olla and Cepola macrophthalma contributing smaller amounts. Our findings highlight the limitations of traditional stomach content analysis, which often underestimates soft-bodied or highly digested prey, and emphasise the importance of isotopic methods to provide a more comprehensive and long-term view of trophic interactions. This integrated approach enhances our understanding of O. vulgaris feeding strategies and has significant implications for ecological research and the sustainable management of fisheries in the region.eng
dc.description.sponsorshipMarine and Environmental Research Centre (MARE) doi:10.54499/UIDB/04292/2020 and Associated Laboratory Aquatic Research Network (ARNET) doi:10.5 4499/LA/P/0069/2020
dc.identifier.citationSeixas, S., Baeta, A., & Marques, J. C. (2026). Integrating prey monitoring and stable isotope analysis to assess the diet of Octopus vulgaris in Portuguese coastal waters. Fisheries Research, 293, 107649.
dc.identifier.doi10.1016/j.fishres.2026.107649
dc.identifier.urihttp://hdl.handle.net/10400.2/21494
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationAquatic Research Infrastructure Network
dc.relationMarine and Environmental Sciences Centre
dc.relation.hasversion10.1016/j.fishres.2026.107649
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectOctopus vulgaris
dc.subjectFeeding ecology
dc.subjectStable isotope analysis
dc.subjectPrey selection
dc.subjectTrophic interaction
dc.subjectMarine food web
dc.subjectTrophic level estimation
dc.titleIntegrating prey monitoring and stable isotope analysis to assess the diet of Octopus vulgaris in Portuguese coastal watereng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberLA/P/0069/2020
oaire.awardNumberUIDB/04292/2020
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT
oaire.citation.endPage6
oaire.citation.startPage1
oaire.citation.titleFisheries Research
oaire.citation.volume293
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSeixas
person.givenNameSónia
person.identifier1994900
person.identifier.ciencia-idD813-882D-0810
person.identifier.orcid0000-0002-9635-6321
person.identifier.ridD-2750-2015
person.identifier.scopus-author-id56005549200
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
relation.isAuthorOfPublication88c73c1d-edd3-4cc4-89b8-0dfd326393fe
relation.isAuthorOfPublication.latestForDiscovery88c73c1d-edd3-4cc4-89b8-0dfd326393fe
relation.isProjectOfPublicationbb8b4ba3-579d-4078-a002-041e66950eb8
relation.isProjectOfPublicationab4c7966-f47c-4c60-9539-471e2521c0c3
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