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Pan-Atlantic distribution patterns and reproductive biology of the bigeye thresher, Alopias superciliosus

2015Journal article Restricted access
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dc.contributor.authorFernandez-Carvalho, Joana
dc.contributor.authorCoelho, Rui
dc.contributor.authorMejuto, Jaime
dc.contributor.authorCortés, Enric
dc.contributor.authorDomingo, Andrés
dc.contributor.authorYokawa, Kotaro
dc.contributor.authorLiu, Kwang-Ming
dc.contributor.authorGarcía-Cortés, Blanca
dc.contributor.authorForselledo, Rodrigo
dc.contributor.authorOhshimo, Seiji
dc.contributor.authorRamos-Cartelle, Ana
dc.contributor.authorTsai, Wen-Pei
dc.contributor.authorSantos, Miguel N.
dc.date.accessioned2020-12-03T10:18:33Z
dc.date.available2020-12-03T10:18:33Z
dc.date.issued2015
dc.description.abstractThe bigeye thresher (Alopias supercilious) is occasionally caught as bycatch in pelagic longline fisheries targeting tunas and swordfish. Still, it is one of the least known and studied of all pelagic sharks, which hinders assessment of the status of its populations. As part of an ongoing cooperative program for fisheries and biological data collection, information collected by fishery observers and through scientific projects from several nations that undertake fishing activities in the Atlantic (Japan, Portugal, Spain, Taiwan, Uruguay and US) was compiled and analyzed. Datasets include information on location, size, sex and, in some cases, maturity stage. A total of 5590 bigeye thresher records collected between 1992 and 2013 were compiled, with sizes ranging from 70 to 305 cm fork length (FL). Considerable variability was observed in size, with tropical regions recording a smaller mean size compared to other regions. The distribution of juvenile and adult specimens also showed considerable variability, and the sex ratios varied between regions and size classes. Median sizes at maturity were estimated at 208.6 cm FL for females and 159.2 cm FL for males. Pregnant females were recorded in the tropical northeast and southwest Atlantic, with these regions possibly serving as nursery areas. The biological and distributional patterns presented in this study provide a better understanding of different aspects of this species in the Atlantic, which can help managers adopt more informed and efficient conservation measures.pt_PT
dc.description.sponsorshipPROMAR Proj. 31-03-05-FEP-1,IF/00253/2014pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s11160-015-9389-7pt_PT
dc.identifier.issn0960-3166
dc.identifier.urihttp://hdl.handle.net/10400.1/14865
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPOPULATION DYNAMICS AND FISHERIES ASSESSMENT OF THE BIGEYE THRESHER SHARK ALOPIAS SUPERCILIOSUS IN THE ATLANTIC OCEAN: A COMPARISON BETWEEN NORTH AND SOUTH ATLANTIC FISHING STOCKS
dc.subjectAlopiidaept_PT
dc.subjectPelagic sharkspt_PT
dc.subjectSex ratiospt_PT
dc.subjectSpatial distributionpt_PT
dc.subjectSize distributionpt_PT
dc.subjectSeasonalitypt_PT
dc.titlePan-Atlantic distribution patterns and reproductive biology of the bigeye thresher, Alopias superciliosuspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitlePOPULATION DYNAMICS AND FISHERIES ASSESSMENT OF THE BIGEYE THRESHER SHARK ALOPIAS SUPERCILIOSUS IN THE ATLANTIC OCEAN: A COMPARISON BETWEEN NORTH AND SOUTH ATLANTIC FISHING STOCKS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F109915%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F60624%2F2009/PT
oaire.citation.endPage568pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage551pt_PT
oaire.citation.titleReviews in Fish Biology and Fisheriespt_PT
oaire.citation.volume25pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameFernandez-Carvalho
person.familyNameCoelho
person.givenNameJoana
person.givenNameRui
person.identifier134638
person.identifier.ciencia-idDC1A-20B7-EAC0
person.identifier.orcid0000-0001-5860-1413
person.identifier.orcid0000-0003-3813-5157
person.identifier.ridM-3438-2013
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.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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relation.isAuthorOfPublication6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isAuthorOfPublication.latestForDiscovery6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isProjectOfPublication646a664d-f899-4d80-a138-3023563d04c6
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