Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands

Autores
Novillo Estofan, Julio Manuel; Moreira, María Eugenia; Macchi, Gustavo Javier; Barrera Oro, Esteban
Año de publicación
2019
Idioma
español castellano
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The knowledge of the reproductive biology of blackfin icefish Chaenocephalus aceratus in the southern Scotia Arc has been based, primarily on macroscopic observations of its maturation cycle, and lately, on histological analysis of ovaries in developing phase exclusively. Our study on reproduction of C. aceratus collected at Potter Cove (PC), South Shetland Islands (SSI), highlights the importance of histologic techniques to validate gonadal macroscopic maturity stages in order to estimate reliable reproductive parameters, in this work obtained from gravid females. Gonado-somatic index (GSI) of 7-21% (13.50±4.20, n=21), mature oocytes of 2.5-4.0 mm and total fecundity (TF) of 7372-17212 oocytes/female (12,466 ± 2911, n=13) were estimated. Although it is known that variations in the reproductive parameters of C. aceratus between areas of the Scotia Arc are linked to local environmental factors (i.e. hydrographic or biotic), we found close agreement between our results from PC and recent literature data for the South Georgia population, which also arose from the analysis of gravid females. Differently, lower GSIs and oocyte sizes, and higher TF reported lately for the offshore SSI population might be at least partially explained by the fact that these parameters were estimated from the analysis of developing ovaries. Based on our sampling and reproductive effort data, we suggest: (1) the spawning period of C. aceratus at the SSI might be more extended than previously belief, starting from late December until June; (2) the sheltered waters of PC might be a spawning site for C. aceratus, which highlights the role of nearshore areas as spawning grounds of notothenioids.
Fil: Novillo Estofan, Julio Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Moreira, María Eugenia. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentina
Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
XVIII Congreso Latinoamericano de Ciencias del Mar
Mar del Plata
Argentina
Asociación Latinoamericana de Investigadores en Ciencias del Mar
Materia
POTTER COVE
SOUTH SHETLAND ISLANDS
CHANNICHTHYIDAE
MARINE ECOLOGY
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:11336/155904
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/155904
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland IslandsNovillo Estofan, Julio ManuelMoreira, María EugeniaMacchi, Gustavo JavierBarrera Oro, EstebanPOTTER COVESOUTH SHETLAND ISLANDSCHANNICHTHYIDAEMARINE ECOLOGYhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The knowledge of the reproductive biology of blackfin icefish Chaenocephalus aceratus in the southern Scotia Arc has been based, primarily on macroscopic observations of its maturation cycle, and lately, on histological analysis of ovaries in developing phase exclusively. Our study on reproduction of C. aceratus collected at Potter Cove (PC), South Shetland Islands (SSI), highlights the importance of histologic techniques to validate gonadal macroscopic maturity stages in order to estimate reliable reproductive parameters, in this work obtained from gravid females. Gonado-somatic index (GSI) of 7-21% (13.50±4.20, n=21), mature oocytes of 2.5-4.0 mm and total fecundity (TF) of 7372-17212 oocytes/female (12,466 ± 2911, n=13) were estimated. Although it is known that variations in the reproductive parameters of C. aceratus between areas of the Scotia Arc are linked to local environmental factors (i.e. hydrographic or biotic), we found close agreement between our results from PC and recent literature data for the South Georgia population, which also arose from the analysis of gravid females. Differently, lower GSIs and oocyte sizes, and higher TF reported lately for the offshore SSI population might be at least partially explained by the fact that these parameters were estimated from the analysis of developing ovaries. Based on our sampling and reproductive effort data, we suggest: (1) the spawning period of C. aceratus at the SSI might be more extended than previously belief, starting from late December until June; (2) the sheltered waters of PC might be a spawning site for C. aceratus, which highlights the role of nearshore areas as spawning grounds of notothenioids.Fil: Novillo Estofan, Julio Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Moreira, María Eugenia. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; ArgentinaFil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaXVIII Congreso Latinoamericano de Ciencias del MarMar del PlataArgentinaAsociación Latinoamericana de Investigadores en Ciencias del MarCongreso Latinoamericano de Ciencias del Mar2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/155904Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands; XVIII Congreso Latinoamericano de Ciencias del Mar; Mar del Plata; Argentina; 2019; 232-232CONICET DigitalCONICETspainfo:eu-repo/semantics/altIdentifier/url/https://rid.unrn.edu.ar/bitstream/20.500.12049/3880/3/LIBRO-DE-RESUMENES-COLACMAR-2019.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 Técnicas2025-10-15T14:25:16Zoai:ri.conicet.gov.ar:11336/155904instacron: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 14:25:17.225CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
title Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
spellingShingle Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
Novillo Estofan, Julio Manuel
POTTER COVE
SOUTH SHETLAND ISLANDS
CHANNICHTHYIDAE
MARINE ECOLOGY
title_short Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
title_full Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
title_fullStr Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
title_full_unstemmed Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
title_sort Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands
dc.creator.none.fl_str_mv Novillo Estofan, Julio Manuel
Moreira, María Eugenia
Macchi, Gustavo Javier
Barrera Oro, Esteban
author Novillo Estofan, Julio Manuel
author_facet Novillo Estofan, Julio Manuel
Moreira, María Eugenia
Macchi, Gustavo Javier
Barrera Oro, Esteban
author_role author
author2 Moreira, María Eugenia
Macchi, Gustavo Javier
Barrera Oro, Esteban
author2_role author
author
author
dc.subject.none.fl_str_mv POTTER COVE
SOUTH SHETLAND ISLANDS
CHANNICHTHYIDAE
MARINE ECOLOGY
topic POTTER COVE
SOUTH SHETLAND ISLANDS
CHANNICHTHYIDAE
MARINE ECOLOGY
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 knowledge of the reproductive biology of blackfin icefish Chaenocephalus aceratus in the southern Scotia Arc has been based, primarily on macroscopic observations of its maturation cycle, and lately, on histological analysis of ovaries in developing phase exclusively. Our study on reproduction of C. aceratus collected at Potter Cove (PC), South Shetland Islands (SSI), highlights the importance of histologic techniques to validate gonadal macroscopic maturity stages in order to estimate reliable reproductive parameters, in this work obtained from gravid females. Gonado-somatic index (GSI) of 7-21% (13.50±4.20, n=21), mature oocytes of 2.5-4.0 mm and total fecundity (TF) of 7372-17212 oocytes/female (12,466 ± 2911, n=13) were estimated. Although it is known that variations in the reproductive parameters of C. aceratus between areas of the Scotia Arc are linked to local environmental factors (i.e. hydrographic or biotic), we found close agreement between our results from PC and recent literature data for the South Georgia population, which also arose from the analysis of gravid females. Differently, lower GSIs and oocyte sizes, and higher TF reported lately for the offshore SSI population might be at least partially explained by the fact that these parameters were estimated from the analysis of developing ovaries. Based on our sampling and reproductive effort data, we suggest: (1) the spawning period of C. aceratus at the SSI might be more extended than previously belief, starting from late December until June; (2) the sheltered waters of PC might be a spawning site for C. aceratus, which highlights the role of nearshore areas as spawning grounds of notothenioids.
Fil: Novillo Estofan, Julio Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Moreira, María Eugenia. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentina
Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
XVIII Congreso Latinoamericano de Ciencias del Mar
Mar del Plata
Argentina
Asociación Latinoamericana de Investigadores en Ciencias del Mar
description The knowledge of the reproductive biology of blackfin icefish Chaenocephalus aceratus in the southern Scotia Arc has been based, primarily on macroscopic observations of its maturation cycle, and lately, on histological analysis of ovaries in developing phase exclusively. Our study on reproduction of C. aceratus collected at Potter Cove (PC), South Shetland Islands (SSI), highlights the importance of histologic techniques to validate gonadal macroscopic maturity stages in order to estimate reliable reproductive parameters, in this work obtained from gravid females. Gonado-somatic index (GSI) of 7-21% (13.50±4.20, n=21), mature oocytes of 2.5-4.0 mm and total fecundity (TF) of 7372-17212 oocytes/female (12,466 ± 2911, n=13) were estimated. Although it is known that variations in the reproductive parameters of C. aceratus between areas of the Scotia Arc are linked to local environmental factors (i.e. hydrographic or biotic), we found close agreement between our results from PC and recent literature data for the South Georgia population, which also arose from the analysis of gravid females. Differently, lower GSIs and oocyte sizes, and higher TF reported lately for the offshore SSI population might be at least partially explained by the fact that these parameters were estimated from the analysis of developing ovaries. Based on our sampling and reproductive effort data, we suggest: (1) the spawning period of C. aceratus at the SSI might be more extended than previously belief, starting from late December until June; (2) the sheltered waters of PC might be a spawning site for C. aceratus, which highlights the role of nearshore areas as spawning grounds of notothenioids.
publishDate 2019
dc.date.none.fl_str_mv 2019
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status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/155904
Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands; XVIII Congreso Latinoamericano de Ciencias del Mar; Mar del Plata; Argentina; 2019; 232-232
CONICET Digital
CONICET
url http://hdl.handle.net/11336/155904
identifier_str_mv Notes on reproductive effort parameters and spawning in Chaenocephalus aceratus (pisces, notothenioidei) from the South Shetland Islands; XVIII Congreso Latinoamericano de Ciencias del Mar; Mar del Plata; Argentina; 2019; 232-232
CONICET Digital
CONICET
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language spa
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dc.publisher.none.fl_str_mv Congreso Latinoamericano de Ciencias del Mar
publisher.none.fl_str_mv Congreso Latinoamericano de Ciencias del Mar
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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