The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean

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dc.contributor.authorOddone, María Cristina [UNESP]
dc.contributor.authorAmorim, Alberto F.
dc.contributor.authorMancini, Patricia L.
dc.contributor.authorNorbis, Walter
dc.contributor.authorVelasco, Gonzalo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto de Pesca
dc.contributor.institutionProjeto Albatroz
dc.contributor.institutionNacional de Recursos Acuáticos
dc.date.accessioned2014-05-27T11:22:42Z
dc.date.available2014-05-27T11:22:42Z
dc.date.issued2007-12-01
dc.description.abstractSpecimens of Rioraja agassizi were collected at Guarujá pier, São Paulo State, Brazil, from March 2005 to March 2006. A total of 275 males were captured. Based on the analysis of the clasper length, gonad weight, clasper gland length, alar thorns and lobule diameter, the size-at-maturity was estimated to be 32 cm. There were 1049 females in the record. Size-at-maturity was calculated in 40 cm. Sexual resting females were observed. Gonadosomatic and hepatosomatic indexes varied significantly in both sexes throughout the year. However, ovulation, egg-laying and presence of sperm in the seminal vesicle were observed all year round. For this reason, an annual cycle with at least one peak in the sexual activity is proposed for this species.en
dc.description.affiliationUniversidade Estadual Paulista Departamento de Ecologia, Campus Rio Claro Av. 24-A 1515, 13506-900 Rio Claro, SP
dc.description.affiliationInstituto de Pesca, Av. Bartolomeu de Gusmão, 192, Ponta de Praia 11030-906 Santos, SP
dc.description.affiliationProjeto Albatroz, Av. Rei Alberto I, N. 450, sala 5, Ponta da Praia 11030-906 Santos, SP
dc.description.affiliationNacional de Recursos Acuáticos Departamento de Biología Pesquera, Constituyente 1497, Montevideo 11200
dc.description.affiliationUnespUniversidade Estadual Paulista Departamento de Ecologia, Campus Rio Claro Av. 24-A 1515, 13506-900 Rio Claro, SP
dc.format.extent593-604
dc.identifierhttp://dx.doi.org/10.3989/scimar.2007.71n3593
dc.identifier.citationScientia Marina, v. 71, n. 3, p. 593-604, 2007.
dc.identifier.doi10.3989/scimar.2007.71n3593
dc.identifier.file2-s2.0-35348906014.pdf
dc.identifier.issn0214-8358
dc.identifier.scopus2-s2.0-35348906014
dc.identifier.urihttp://hdl.handle.net/11449/70098
dc.language.isoeng
dc.relation.ispartofScientia Marina
dc.relation.ispartofjcr1.183
dc.relation.ispartofsjr0,558
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectClasper
dc.subjectClasper gland
dc.subjectEgg-bearing
dc.subjectElasmobranchs
dc.subjectGonads
dc.subjectNidamental gland
dc.subjectVitellogenic follicles
dc.subjectfish
dc.subjectgamete
dc.subjectreproductive biology
dc.subjectreproductive cycle
dc.subjectsexual behavior
dc.subjectsexual reproduction
dc.subjectsize at maturity
dc.subjectAtlantic Ocean
dc.subjectBrazil
dc.subjectSao Paulo [Brazil]
dc.subjectSouth America
dc.subjectChondrichthyes
dc.subjectElasmobranchii
dc.subjectRajidae
dc.subjectRioraja
dc.titleThe reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Oceanen
dc.typeArtigo
dcterms.licensehttp://scientiamarina.revistas.csic.es/index.php/scientiamarina/about
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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Artigos - Ecologia - IBRC