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Segmentation and fishery characteristics of the mixed-species multi-gear portuguese fleet

2009-04Journal article Open access
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dc.contributor.authorDuarte, Rafael
dc.contributor.authorAzevedo, Manuela
dc.contributor.authorAfonso-Dias, Manuel
dc.date.accessioned2018-12-07T14:52:31Z
dc.date.available2018-12-07T14:52:31Z
dc.date.issued2009-04
dc.description.abstractFleet segmentation and knowledge of fishing fleet dynamics are essential to move from single species to fishery/fleet-based advice. The coastal mixed-species multi-gear Portuguese fleet comprises medium-sized (> 12m) vessels, using a diversity of passive gears, and is economically important. For hake (under a recovery plan) and monkfish (overexploited), it contributes > 50% to their total annuel landings. Commercial daily landings in 2005 from 271 vessels were analysed by region using non-hierarchical cluster analysis and multi-variate regression trees. The cluster analysis allowed the identification of regional fleet segments with a low mixture of species through-out the year. The multivariate regression trees were applied to clusters of vessels with a high mixture of species, to explain weekly landing profiles (species) by vessel technical characteristics, fishing license, and main landing port. The results showed a link between exploited species and geographic location, and in the north between vessel size and depth and an inshore/offshore range. Finally, from the analysis and for the most important species exploited by the Portuguese multi-gear fleet, it was possible to define two or three vessel groups that accounted for at least 50% of the landed value.
dc.description.sponsorshipNeoMAv "New Assessment Methodologies"; Portuguese General Directorate for Fisheries and Aquaculture (DGPA); Sarah Walmsley (Cefas); Pedro de Barros of the University of the Algarve
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1093/icesjms/fsp019
dc.identifier.issn1054-3139
dc.identifier.urihttp://hdl.handle.net/10400.1/11108
dc.language.isoeng
dc.peerreviewedyes
dc.publisherOxford University Press
dc.rights.urihttp://creativecommons.org/licenses/by/4.0
dc.subjectTrawl fisheries
dc.subjectGulf
dc.subjectAssemblages
dc.subjectManagement
dc.subjectDefinition
dc.subjectComponents
dc.subjectPatterns
dc.subjectDemersal
dc.subjectCadiz
dc.subjectCatch
dc.titleSegmentation and fishery characteristics of the mixed-species multi-gear portuguese fleet
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage606
oaire.citation.issue3
oaire.citation.startPage594
oaire.citation.titleICES Journal of Marine Science
oaire.citation.volume66
person.familyNameAfonso-Dias
person.givenNameManuel
person.identifier.orcid0000-0002-6790-9273
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublicationbc24719e-a32e-4a25-b9ea-03744f5fd339
relation.isAuthorOfPublication.latestForDiscoverybc24719e-a32e-4a25-b9ea-03744f5fd339

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