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

Detalhes bibliográficos
Autor(a) principal: Oddone, Maria Cristina
Data de Publicação: 2007
Outros Autores: Amorim, Alberto Ferreira de, Mancini, Patrícia Luciano, Norbis, Walter, Velasco, Gonzalo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/1244
Resumo: Specimens 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.
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spelling The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic OceanClasperClasper glandVitellogenic folliclesElasmobranchsNidamental glandEgg-bearingGonadsElasmobranquiosGlándula nidamentáriaDeposición de cápsulas ovígerasGónadasSpecimens 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.BIOLOGÍAREPRODUCTIVADE RIORAJAAGASSIZI (MÜLLERAND HENLE, 1841) (CHONDRICHTHYES: RAJIDAE), ENEL SUDESTEBRASILEÑO, ATLÁNTICO SUDOCCIDENTAL. –Se colectaron especímenes de Rioraja agassizi en el puerto de Guarujá, Estado de San Pablo, Brasil, desde marzo de 2005 hasta marzo de 2006. Se capturó un número total de 275 machos. De acuerdo con el análisis de la longitud del clasper y de la glándula del clasper, el peso de las gónadas, el diámetro de los lóbulos y el número de espinas alares, el tamaño de primera madurez sexual fue estimado en 32 cm. Se capturó un número de 1049 hembras. El tamaño de primera madurez sexual fue calculado en 40 cm. Se observó reposo sexual en hembras de esta especie. Los índices gonadosomáticos y hepatosomáticos variaron significativamente en ambos sexos a lo largo del año. Sin embargo, la ovulación y la deposición de cápsulas ovígeras sucedieron continuamente durante todo el año, así como la presencia de esperma en la vesícula seminal en ejemplares adultos. Por este motivo, se propone para esta especie, un ciclo reproductivo anual, con por lo menos un pico en la actividad sexual.2011-11-01T16:02:24Z2011-11-01T16:02:24Z2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfODDONE, Maria Cristina et al. The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes, Rajidae), in southeastern Brazil, SW Atlantic Ocean. Scientia Marina , v. 71, p. 593-604, 2007. Disponível em: <http://www.icm.csic.es/scimar/pdf/71/sm71n3593.pdf>. Acesso em: 31 out. 2011.0214-8358http://repositorio.furg.br/handle/1/1244engOddone, Maria CristinaAmorim, Alberto Ferreira deMancini, Patrícia LucianoNorbis, WalterVelasco, Gonzaloinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2023-01-17T12:39:21Zoai:repositorio.furg.br:1/1244Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2023-01-17T12:39:21Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
title The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
spellingShingle The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
Oddone, Maria Cristina
Clasper
Clasper gland
Vitellogenic follicles
Elasmobranchs
Nidamental gland
Egg-bearing
Gonads
Elasmobranquios
Glándula nidamentária
Deposición de cápsulas ovígeras
Gónadas
title_short The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
title_full The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
title_fullStr The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
title_full_unstemmed The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
title_sort The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean
author Oddone, Maria Cristina
author_facet Oddone, Maria Cristina
Amorim, Alberto Ferreira de
Mancini, Patrícia Luciano
Norbis, Walter
Velasco, Gonzalo
author_role author
author2 Amorim, Alberto Ferreira de
Mancini, Patrícia Luciano
Norbis, Walter
Velasco, Gonzalo
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Oddone, Maria Cristina
Amorim, Alberto Ferreira de
Mancini, Patrícia Luciano
Norbis, Walter
Velasco, Gonzalo
dc.subject.por.fl_str_mv Clasper
Clasper gland
Vitellogenic follicles
Elasmobranchs
Nidamental gland
Egg-bearing
Gonads
Elasmobranquios
Glándula nidamentária
Deposición de cápsulas ovígeras
Gónadas
topic Clasper
Clasper gland
Vitellogenic follicles
Elasmobranchs
Nidamental gland
Egg-bearing
Gonads
Elasmobranquios
Glándula nidamentária
Deposición de cápsulas ovígeras
Gónadas
description Specimens 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.
publishDate 2007
dc.date.none.fl_str_mv 2007
2011-11-01T16:02:24Z
2011-11-01T16:02:24Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv ODDONE, Maria Cristina et al. The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes, Rajidae), in southeastern Brazil, SW Atlantic Ocean. Scientia Marina , v. 71, p. 593-604, 2007. Disponível em: <http://www.icm.csic.es/scimar/pdf/71/sm71n3593.pdf>. Acesso em: 31 out. 2011.
0214-8358
http://repositorio.furg.br/handle/1/1244
identifier_str_mv ODDONE, Maria Cristina et al. The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes, Rajidae), in southeastern Brazil, SW Atlantic Ocean. Scientia Marina , v. 71, p. 593-604, 2007. Disponível em: <http://www.icm.csic.es/scimar/pdf/71/sm71n3593.pdf>. Acesso em: 31 out. 2011.
0214-8358
url http://repositorio.furg.br/handle/1/1244
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
_version_ 1813187267348398080

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