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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorOddone, Maria Cristina
dc.creatorAmorim, Alberto F.
dc.creatorMancini, Patricia L.
dc.creatorNorbis, Walter
dc.creatorVelasco, Gonzalo
dc.date2014-02-26T17:01:12Z
dc.date2014-05-20T13:57:14Z
dc.date2016-10-25T17:06:13Z
dc.date2014-02-26T17:01:12Z
dc.date2014-05-20T13:57:14Z
dc.date2016-10-25T17:06:13Z
dc.date2007-09-01
dc.date.accessioned2017-04-05T21:16:44Z
dc.date.available2017-04-05T21:16:44Z
dc.identifierScientia Marina. Barcelona: Inst Ciências Mar Barcelona, v. 71, n. 3, p. 593-604, 2007.
dc.identifier0214-8358
dc.identifierhttp://hdl.handle.net/11449/20409
dc.identifierhttp://acervodigital.unesp.br/handle/11449/20409
dc.identifierWOS:000250813900016
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/866120
dc.descriptionSpecimens of Rioraja agassizi were collected Lit Guaruja 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.
dc.languageeng
dc.publisherInst Ciências Mar Barcelona
dc.relationScientia Marina
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectclasper
dc.subjectclasper gland
dc.subjectvitellogenic follicles
dc.subjectelasmobranchs
dc.subjectnidamental gland
dc.subjectegg-bearing
dc.subjectgonads
dc.titleThe reproductive hiology and cycle of Rioraja agassizi (Muller and Henle, 1841) (Chondrichthyes : Rajidae) in southeastern Brazil, SW Atlantic Ocean
dc.typeOtro


Este ítem pertenece a la siguiente institución