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Age and growth of the smooth hammerhead, Sphyrna zygaena, in the Atlantic Ocean: comparison with other hammerhead species

2017Journal article Open access
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dc.contributor.authorRosa, Daniela
dc.contributor.authorCoelho, Rui
dc.contributor.authorFernandez-Carvalho, Joana
dc.contributor.authorSantos, Miguel N.
dc.date.accessioned2020-12-03T11:01:13Z
dc.date.available2020-12-03T11:01:13Z
dc.date.issued2017
dc.description.abstractThe smooth hammerhead Sphyrna zygaena (Sphyrnidae) is a pelagic shark occasionally caught as bycatch in pelagic longline fisheries, but is one of the least studied of all pelagic sharks. Age and growth of S. zygaena was studied along a wide Atlantic region covering both the northern and southern hemispheres. Data from 304 specimens, caught between October 2009 and September 2014, ranging in size from 126 to 253 cm fork length (FL), were analysed. Growth models were fitted using the three-parameter von Bertalanffy growth function (VBGF) re-parameterized to calculate L0 (size at birth). Growth models were fitted to the sample data and data from several back-calculation models. The model fit to the quadratic modified Dahl-Lea back-calculated data seems to be the most appropriate to describe growth in this species, with resulting growth parameters of Linf = 285 cm FL, k = 0.09 year−1 for males and Linf = 293 cm FL, k = 0.09 year−1 for females. Compared with other species of the same genus, estimated growth coefficients for S. zygaena seem to fall in the low to middle range. Although further work is still needed, this study adds to knowledge of the vital life-history parameters of smooth hammerheads in the Atlantic Ocean, which can be used in the management and conservation of this species.pt_PT
dc.description.sponsorshipPrograma Operacional Potencial Humano: IF/00253/2014pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1080/17451000.2016.1267366pt_PT
dc.identifier.issn1745-1000
dc.identifier.urihttp://hdl.handle.net/10400.1/14867
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.relation.publisherversionhttps://www.tandfonline.com/doi/full/10.1080/17451000.2016.1267366pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectAge and growthpt_PT
dc.subjectBack59 calculationpt_PT
dc.subjectSmooth hammerheadpt_PT
dc.subjectAtlantic Oceanpt_PT
dc.subjectVertebral band countspt_PT
dc.subjectLife historypt_PT
dc.titleAge and growth of the smooth hammerhead, Sphyrna zygaena, in the Atlantic Ocean: comparison with other hammerhead speciespt_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//SFRH%2FBD%2F60624%2F2009/PT
oaire.citation.endPage313pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage300pt_PT
oaire.citation.titleMarine Biology Researchpt_PT
oaire.citation.volume13pt_PT
person.familyNameCoelho
person.familyNameFernandez-Carvalho
person.givenNameRui
person.givenNameJoana
person.identifier134638
person.identifier.ciencia-idDC1A-20B7-EAC0
person.identifier.orcid0000-0003-3813-5157
person.identifier.orcid0000-0001-5860-1413
person.identifier.ridC-1163-2008
person.identifier.ridM-3438-2013
person.identifier.scopus-author-id56257111100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isAuthorOfPublicationdcdd74ea-9a38-4304-8d81-3e1e1e663a34
relation.isAuthorOfPublication.latestForDiscovery6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isProjectOfPublication8a490a00-8ebe-4c53-a77d-01ff7ef8b8cd
relation.isProjectOfPublication.latestForDiscovery8a490a00-8ebe-4c53-a77d-01ff7ef8b8cd

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