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Assessment of trends in the Portuguese elasmobranch commercial landings over three decades (1986–2017)

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dc.contributor.authorAlves, Luís M.
dc.contributor.authorCorreia, João P. S.
dc.contributor.authorLemos, Marco F.L.
dc.contributor.authorNovais, Sara C.
dc.contributor.authorCabral, Henrique
dc.date.accessioned2021-07-22T08:41:47Z
dc.date.available2021-07-22T08:41:47Z
dc.date.issued2020
dc.descriptionThis study was supported by Fundação para a Ciência e a Tecnologia (FCT) and FEDER through the project BLUESHARKER (PTDC/CTAAMB/29136/2017) and the Strategic Project UID/MAR/04292/2019. The project was also funded by the Integrated Programme of SR&TD “SmartBioR” (Centro-01-0145-FEDER-000018) cofunded by Centro 2020 program, Portugal2020, European Union, through the European Regional Development Fund. Luís M.F. Alves also wishes to L.M.F. Alves, et al. Fisheries Research 230 (2020) 105648 7 acknowledge the financial support given by FCT (SFRH/BD/122082/ 2016). This study was also supported by Oceanário de Lisboa and Oceano Azul Foundation through the project Shark Attract, winner of the first edition of the Ocean’s Conservation Fund.
dc.description.abstractPortugal plays a major role in shark, skate and ray fisheries in the European Union. With the decline of these animals raising concerns amongst scientists all over the world, we set out to provide an updated assessment on elasmobranch landings in Portugal between 1986 and 2017. The dataset analysed in this study consisted of 15,521 records, each with information concerning the species (or higher taxonomic level), port, month, year, and weight of fish landed. A non-parametric change points assessment statistical technique was used to evaluate important changes in landings throughout the time series. Principal components analysis was also performed to mean values of landings per year for the most captured species, and similar analysis was conducted using fishing ports instead of year, for the same sub-set of species / taxa. According to the data, more than 143 thousand metric tons of elasmobranchs were landed in Portuguese ports between 1986 and 2017, divided by 58 taxa of sharks, skates and rays. The most landed taxa were demersal rays and skates (Raja spp.), followed by spotted dogfishes (Scyliorhinus spp.), blue shark (Prionace glauca), Portuguese dogfish (Centroscymnus coelolepis), leafscale gulper shark (Centrophorus squamosus), gulper shark (Centrophorus granulosus) and shortfin mako (Isurus oxyrinchus). Together, these seven taxa accounted for more than 75% of all landings. Several cases of misreporting were identified and discussed. Overall, landings of elasmobranchs in Portugal show marked decreases and changes in composition, with deep-sea sharks being the most influential group during the studied period.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAlves, L.M.F., Correia, J.P.S., Lemos, M.F.L., Novais, S.C. & Cabral, H. (2020). Assessment of trends in the Portuguese elasmobranch commercial landings over three decades (1986–2017). Fisheries Research. https://doi.org/10.1016/j.fishres.2020.105648pt_PT
dc.identifier.doi10.1016/j.fishres.2020.105648pt_PT
dc.identifier.issn0165-7836
dc.identifier.urihttp://hdl.handle.net/10400.8/5914
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation
dc.relationMARE - Marine and Environmental Sciences Centre
dc.relationBiomonitoring Atlantic deepwaters through the assessment of biomarkers in sharks
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSharkspt_PT
dc.subjectCommercial fisheriespt_PT
dc.subjectCommon fisheries policypt_PT
dc.subjectBycatchpt_PT
dc.subjectMisreportingpt_PT
dc.titleAssessment of trends in the Portuguese elasmobranch commercial landings over three decades (1986–2017)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMARE - Marine and Environmental Sciences Centre
oaire.awardTitleBiomonitoring Atlantic deepwaters through the assessment of biomarkers in sharks
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMAR%2F04292%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_CENTRO/SFRH%2FBD%2F122082%2F2016/PT
oaire.citation.titleFisheries Researchpt_PT
oaire.citation.volume230pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamPOR_CENTRO
person.familyNameAlves
person.familyNameCorreia
person.familyNameLemos
person.familyNameNovais
person.givenNameLuís
person.givenNameJoão
person.givenNameMarco
person.givenNameSara
person.identifier414226
person.identifier996337
person.identifier.ciencia-idB615-BAFB-B8ED
person.identifier.ciencia-id281D-9F46-4EAE
person.identifier.ciencia-id2216-A2E0-A118
person.identifier.orcid0000-0001-5106-7430
person.identifier.orcid0000-0002-3613-5420
person.identifier.orcid0000-0001-9887-1864
person.identifier.orcid0000-0003-1306-3396
person.identifier.ridF-7951-2011
person.identifier.ridA-9032-2012
person.identifier.scopus-author-id7202364150
person.identifier.scopus-author-id7006042884
person.identifier.scopus-author-id23025463300
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
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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