Size and sex compositions, length-weight relationship, and occurrence of the Brazilian sharpnose shark, Rhizoprionodon lalandii, caught by artisanal fishery from southeastern Brazil

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dc.contributor.authorMotta, F. S.
dc.contributor.authorGadig, OBF
dc.contributor.authorNamora, R. C.
dc.contributor.authorBraga, FMS
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:06Z
dc.date.available2014-05-20T15:20:06Z
dc.date.issued2005-08-01
dc.description.abstractAlthough the Brazilian sharpnose shark, Rhizoprionodon lalandii (Muller and Henle, 1839), is an inshore species widely distributed in the Western Atlantic from Panama to Uruguay, there is little available information on its biology. During a long-term study of small coastal sharks caught by gill net fisheries in southeastern Brazil (PROJETO CACAO), 3643 specimens of R. lalandii were examined, comprising 61.3% of the total sharks,and including all sizes classes, from 30 to 78,5 cm TL., and weights from 100 to 2950 g. The length-weight relationships were not significantly different between sexes, Overall sex ratio favoured the males slightly at the rate of 1.3: 1. Sex ratios, however, did differ significantly between season and size classes. This species occurred in this area all year long. Three seasonal size-class Occurrence patterns were recognized: (1) between October and March, the juveniles were more frequents (2) from April to July, adults were most common, and (3) from August to September, neonates were most numerically abundant. Such patterns we to associated with reproductive tactics that may reduce intra-specific and inter-specific competition with hammerhead shark neonates (Sphyrna lewini). probably result in reduced natural mortality of the offspring during their first few months. (C) 2005 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, BR-11330900 São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-13506900 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, BR-11330900 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-13506900 São Paulo, Brazil
dc.format.extent116-126
dc.identifierhttp://dx.doi.org/10.1016/j.fishres.2005.03.010
dc.identifier.citationFisheries Research. Amsterdam: Elsevier B.V., v. 74, n. 1-3, p. 116-126, 2005.
dc.identifier.doi10.1016/j.fishres.2005.03.010
dc.identifier.issn0165-7836
dc.identifier.lattes2425382266290470
dc.identifier.lattes2161551575581523
dc.identifier.orcid0000-0001-8423-7299
dc.identifier.urihttp://hdl.handle.net/11449/31449
dc.identifier.wosWOS:000230248700010
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofFisheries Research
dc.relation.ispartofjcr1.874
dc.relation.ispartofsjr0,941
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectelasmobranchiipt
dc.subjectartisanal fisherypt
dc.subjectpopulation biologypt
dc.subjectreproductive easeasonalitypt
dc.subjectRhizoprionodon lalandiipt
dc.titleSize and sex compositions, length-weight relationship, and occurrence of the Brazilian sharpnose shark, Rhizoprionodon lalandii, caught by artisanal fishery from southeastern Brazilen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes2425382266290470
unesp.author.lattes2161551575581523[2]
unesp.author.orcid0000-0001-8423-7299[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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Artigos - Zoologia - IBRC