Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean

Autores
Diego Martín Vazquez; Delpiani, Sergio Matias; Juan Martín Díaz de Astarloa; Mabragaña, Ezequiel
Año de publicación
2018
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The Joined-fins skate Bathyraja cousseauae (Chondrichthyes: Arhynchobatidae) has recently been described by Díaz de Astarloa & Mabragaña (2004) from the Southwestern Atlantic Ocean (SWA), and was also recorded in the Southeast Pacific. Currently, it is assessed as Near Threatened by the IUCN and crucial information about life history and reproduction is scarce. The genus Bathyraja is represented in the SWA by 11 species, most of them exploited as by-catch or target species. From these, egg cases of six species have been described so far. Here, we describe the egg case of B. cousseauae. A mature female bearing egg cases (total length: 1210 mm; disc width: 810 mm) was caught in April 2016 by bottom trawl at 54°14?2.4?S; 63°11?38.4? W, at 293 m depth. One egg case was found in each uterus. Thirteen morphometric characteristics were recorded. Egg cases were large, 127.8-128.2 mm total length (Lec, excluding horns), with maximum egg case width (Wmax) ~ 64 % of Lec. Lateral keel was relatively wide, about 9.5% of Wmax. Anterior apron was considerably narrower (6.7?8.4 times) than posterior apron. Posterior horns were similar in size than the anterior ones. Anterior respiratory canals were relatively large, slightly longer (1.4-1.7 times) than posterior ones. Egg cases in fresh were uniformly bright golden, covered totally by a dense layer of sticky woven-like fibres. Surface had longitudinal striations with abundant, sharp and tall prickles well arranged giving a velvety texture to the touch. Prickles were smaller in the central zone and posterior horns. Attachment fibres were observed at the bases of anterior and posterior horns. An accurate species-level identification of egg cases is crucial for recognizing nursery grounds. The larger egg cases from bathyrajids of the SWA described so far correspond to B. griseocauda and B. cousseauae. They can be distinguised each other by their case surface, being smooth to touch in the first one. The remaining species have smaller egg cases than the joined-fins skate.
Fil: Diego Martín Vazquez. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Delpiani, Sergio Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Juan Martín Díaz de Astarloa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Mabragaña, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Sharks International Conference
Brasil
Universidade Federal Da Paraiba
Materia
Joined-fins skate
bathyrajids
capsules
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/267794
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/267794
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic OceanDiego Martín VazquezDelpiani, Sergio MatiasJuan Martín Díaz de AstarloaMabragaña, EzequielJoined-fins skatebathyrajidscapsuleshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The Joined-fins skate Bathyraja cousseauae (Chondrichthyes: Arhynchobatidae) has recently been described by Díaz de Astarloa & Mabragaña (2004) from the Southwestern Atlantic Ocean (SWA), and was also recorded in the Southeast Pacific. Currently, it is assessed as Near Threatened by the IUCN and crucial information about life history and reproduction is scarce. The genus Bathyraja is represented in the SWA by 11 species, most of them exploited as by-catch or target species. From these, egg cases of six species have been described so far. Here, we describe the egg case of B. cousseauae. A mature female bearing egg cases (total length: 1210 mm; disc width: 810 mm) was caught in April 2016 by bottom trawl at 54°14?2.4?S; 63°11?38.4? W, at 293 m depth. One egg case was found in each uterus. Thirteen morphometric characteristics were recorded. Egg cases were large, 127.8-128.2 mm total length (Lec, excluding horns), with maximum egg case width (Wmax) ~ 64 % of Lec. Lateral keel was relatively wide, about 9.5% of Wmax. Anterior apron was considerably narrower (6.7?8.4 times) than posterior apron. Posterior horns were similar in size than the anterior ones. Anterior respiratory canals were relatively large, slightly longer (1.4-1.7 times) than posterior ones. Egg cases in fresh were uniformly bright golden, covered totally by a dense layer of sticky woven-like fibres. Surface had longitudinal striations with abundant, sharp and tall prickles well arranged giving a velvety texture to the touch. Prickles were smaller in the central zone and posterior horns. Attachment fibres were observed at the bases of anterior and posterior horns. An accurate species-level identification of egg cases is crucial for recognizing nursery grounds. The larger egg cases from bathyrajids of the SWA described so far correspond to B. griseocauda and B. cousseauae. They can be distinguised each other by their case surface, being smooth to touch in the first one. The remaining species have smaller egg cases than the joined-fins skate.Fil: Diego Martín Vazquez. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Delpiani, Sergio Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Juan Martín Díaz de Astarloa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Mabragaña, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaSharks International ConferenceBrasilUniversidade Federal Da ParaibaUniversidade Federal Da Paraiba2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectConferenciaBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/267794Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean; Sharks International Conference; Brasil; 2018; 427-427978-85-237-1396-6CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sharksinternational.org.br/arquivos/Sharks_International_Conference-Abstract_Book_2.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:30:39Zoai:ri.conicet.gov.ar:11336/267794instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:30:40.106CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
title Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
spellingShingle Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
Diego Martín Vazquez
Joined-fins skate
bathyrajids
capsules
title_short Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
title_full Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
title_fullStr Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
title_full_unstemmed Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
title_sort Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean
dc.creator.none.fl_str_mv Diego Martín Vazquez
Delpiani, Sergio Matias
Juan Martín Díaz de Astarloa
Mabragaña, Ezequiel
author Diego Martín Vazquez
author_facet Diego Martín Vazquez
Delpiani, Sergio Matias
Juan Martín Díaz de Astarloa
Mabragaña, Ezequiel
author_role author
author2 Delpiani, Sergio Matias
Juan Martín Díaz de Astarloa
Mabragaña, Ezequiel
author2_role author
author
author
dc.subject.none.fl_str_mv Joined-fins skate
bathyrajids
capsules
topic Joined-fins skate
bathyrajids
capsules
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Joined-fins skate Bathyraja cousseauae (Chondrichthyes: Arhynchobatidae) has recently been described by Díaz de Astarloa & Mabragaña (2004) from the Southwestern Atlantic Ocean (SWA), and was also recorded in the Southeast Pacific. Currently, it is assessed as Near Threatened by the IUCN and crucial information about life history and reproduction is scarce. The genus Bathyraja is represented in the SWA by 11 species, most of them exploited as by-catch or target species. From these, egg cases of six species have been described so far. Here, we describe the egg case of B. cousseauae. A mature female bearing egg cases (total length: 1210 mm; disc width: 810 mm) was caught in April 2016 by bottom trawl at 54°14?2.4?S; 63°11?38.4? W, at 293 m depth. One egg case was found in each uterus. Thirteen morphometric characteristics were recorded. Egg cases were large, 127.8-128.2 mm total length (Lec, excluding horns), with maximum egg case width (Wmax) ~ 64 % of Lec. Lateral keel was relatively wide, about 9.5% of Wmax. Anterior apron was considerably narrower (6.7?8.4 times) than posterior apron. Posterior horns were similar in size than the anterior ones. Anterior respiratory canals were relatively large, slightly longer (1.4-1.7 times) than posterior ones. Egg cases in fresh were uniformly bright golden, covered totally by a dense layer of sticky woven-like fibres. Surface had longitudinal striations with abundant, sharp and tall prickles well arranged giving a velvety texture to the touch. Prickles were smaller in the central zone and posterior horns. Attachment fibres were observed at the bases of anterior and posterior horns. An accurate species-level identification of egg cases is crucial for recognizing nursery grounds. The larger egg cases from bathyrajids of the SWA described so far correspond to B. griseocauda and B. cousseauae. They can be distinguised each other by their case surface, being smooth to touch in the first one. The remaining species have smaller egg cases than the joined-fins skate.
Fil: Diego Martín Vazquez. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Delpiani, Sergio Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Juan Martín Díaz de Astarloa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Mabragaña, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Sharks International Conference
Brasil
Universidade Federal Da Paraiba
description The Joined-fins skate Bathyraja cousseauae (Chondrichthyes: Arhynchobatidae) has recently been described by Díaz de Astarloa & Mabragaña (2004) from the Southwestern Atlantic Ocean (SWA), and was also recorded in the Southeast Pacific. Currently, it is assessed as Near Threatened by the IUCN and crucial information about life history and reproduction is scarce. The genus Bathyraja is represented in the SWA by 11 species, most of them exploited as by-catch or target species. From these, egg cases of six species have been described so far. Here, we describe the egg case of B. cousseauae. A mature female bearing egg cases (total length: 1210 mm; disc width: 810 mm) was caught in April 2016 by bottom trawl at 54°14?2.4?S; 63°11?38.4? W, at 293 m depth. One egg case was found in each uterus. Thirteen morphometric characteristics were recorded. Egg cases were large, 127.8-128.2 mm total length (Lec, excluding horns), with maximum egg case width (Wmax) ~ 64 % of Lec. Lateral keel was relatively wide, about 9.5% of Wmax. Anterior apron was considerably narrower (6.7?8.4 times) than posterior apron. Posterior horns were similar in size than the anterior ones. Anterior respiratory canals were relatively large, slightly longer (1.4-1.7 times) than posterior ones. Egg cases in fresh were uniformly bright golden, covered totally by a dense layer of sticky woven-like fibres. Surface had longitudinal striations with abundant, sharp and tall prickles well arranged giving a velvety texture to the touch. Prickles were smaller in the central zone and posterior horns. Attachment fibres were observed at the bases of anterior and posterior horns. An accurate species-level identification of egg cases is crucial for recognizing nursery grounds. The larger egg cases from bathyrajids of the SWA described so far correspond to B. griseocauda and B. cousseauae. They can be distinguised each other by their case surface, being smooth to touch in the first one. The remaining species have smaller egg cases than the joined-fins skate.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Conferencia
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/267794
Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean; Sharks International Conference; Brasil; 2018; 427-427
978-85-237-1396-6
CONICET Digital
CONICET
url http://hdl.handle.net/11336/267794
identifier_str_mv Egg cases of Bathyraja cousseauae, a poorly known large softnose skate from the Southwest Atlantic Ocean; Sharks International Conference; Brasil; 2018; 427-427
978-85-237-1396-6
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sharksinternational.org.br/arquivos/Sharks_International_Conference-Abstract_Book_2.pdf
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application/pdf
application/pdf
application/pdf
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dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Universidade Federal Da Paraiba
publisher.none.fl_str_mv Universidade Federal Da Paraiba
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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