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An ecosystem approach to pelagic fisheries management in Portuguese continental waters

2021-11Tese de doutoramento Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambientept_PT
dc.contributor.advisorSilva, Alexandra
dc.contributor.advisorCabral, Henrique N.
dc.contributor.advisorRé, Pedro
dc.contributor.authorSzalaj, Dorota
dc.date.accessioned2022-03-23T12:32:39Z
dc.date.available2022-03-23T12:32:39Z
dc.date.issued2021-11
dc.date.submitted2021-05
dc.description.abstractThe ecosystem approach to fisheries management (EAFM) is a new paradigm in fisheries management, that incorporates multi-species, habitat, environmental, and socio-economic elements. Within the scientific community and on the political agenda, EAFM has been recognised as a powerful approach to assist with the management of depleted stocks. However, a clear consensus on how this approach should be implemented in practice is still lacking. The primary aim of this thesis was to apply an EAFM to pelagic fisheries in the Portuguese Continental shelf ecosystem (PCSE). Portuguese pelagic fisheries were chosen as a case study because its main resource sardine has considerably declined in the last two decades. To achieve this aim, a set of methodological approaches to EAFM were used in the context of this fishery. These methodological approaches included spatial analysis, ecosystem modelling (Ecopath with Ecosim) and statistical/indicators approach. This research advances the application of the EAFM in the Portuguese pelagic fishery by, developing tools to support the management of the fishery and by deepening understanding of the PCSE and sardine dynamics. The key findings showed that trophic interactions followed by fishing were the main drivers of PCSE while a rise in sea surface temperature (SST) followed by fishing had the largest impact on sardine decline. This research highlighted that the management besides fishing restrictions should consider other factors that turn out to be important drivers of future sardine change. They are a rise in SST, trophic interactions, especially between sardine and predators of sardine eggs, and the possibility of regime shift occurrence. Moreover, results demonstrated that the pelagic fishery has conflicting objectives between conservation and fisheries and spatial analysis can support their addressing through the assessment of the trade-offs between them. Briefly, this research can support strategic management advice for the pelagic fishery in the PCSE in the context of the EAFM.pt_PT
dc.identifier.tid101580770pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/51912
dc.language.isoengpt_PT
dc.relationNovo: Application of Ecosystem approach to management of sardine fishery in Portuguese continental waters Antigo: An ecosystem-based approach to the management of the pelagic fish resources in the Portuguese continental waters
dc.subjectAbordagem ecossistémica da gestão das pescaspt_PT
dc.subjectSardinhapt_PT
dc.subjectPlataforma continental portuguesapt_PT
dc.subjectAnálise espacialpt_PT
dc.subjectModelagem de ecossistemaspt_PT
dc.subjectEcosystem approach to fisheries managementpt_PT
dc.subjectSardinept_PT
dc.subjectPortuguese continental shelfpt_PT
dc.subjectSpatial analysispt_PT
dc.subjectEcosystem modellingpt_PT
dc.titleAn ecosystem approach to pelagic fisheries management in Portuguese continental waterspt_PT
dc.typedoctoral thesis
dspace.entity.typePublication
oaire.awardNumberPD/BD/114540/2016
oaire.awardTitleNovo: Application of Ecosystem approach to management of sardine fishery in Portuguese continental waters Antigo: An ecosystem-based approach to the management of the pelagic fish resources in the Portuguese continental waters
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/PD%2FBD%2F114540%2F2016/PT
oaire.fundingStreamOE
person.identifier.ciencia-id611A-C2A7-F566
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typedoctoralThesispt_PT
relation.isAuthorOfPublication8acb3037-bb34-44b6-bbee-1984a316f55f
relation.isAuthorOfPublication.latestForDiscovery8acb3037-bb34-44b6-bbee-1984a316f55f
relation.isProjectOfPublicationd54c546c-3147-4881-99f0-c1d97f7602b8
relation.isProjectOfPublication.latestForDiscoveryd54c546c-3147-4881-99f0-c1d97f7602b8
thesis.degree.nameTese de doutoramento, Ciências do Mar, Universidade de Lisboa, Faculdade de Ciências, 2021pt_PT

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