New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence

Autores
Novillo Estofan, Julio Manuel; Elisio, Mariano; 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 Southern Ocean marine ichthyofauna is dominated by a unique costal demersal fish group, the suborder Notothenioidei. The nototheniid Lepidonotothen nudifrons is abundant in nearshore waters of the Scotia Arc region, where it is ecologically important as relevant prey of piscivorous predators. The knowledge of its reproductive biology arises exclusively from macroscopic and histologic descriptions of the maturation cycle. In this study, we provide for first time in L. nudifrons adult females, information on oocyte growth rate and change in testosterone (T) and estradiol (E2) plasma levels throughout their ovarian growth period in summer. Briefly, 98 specimens were caught at Potter Cove (PC), South Shetland Islands (SSI), from November to late March in the consecutive campaigns 2016/2017- 2017/2018. Histological analysis of the ovaries confirmed the macroscopic characteristic of the two distinct cohorts of oocytes: one leading clutch (Lc) of large orange vitellogenic oocytes, likely to be spawned in the upcoming reproductive season, and a second clutch of smaller whitish previtellogenic oocytes. In late March, females (n=17) had gonado-somatic index values between 13 and 20% (16.73±2.10) and total fecundity ranged between 2196 and 4652 oocytes/female (3209± 740), while Lc oocytes reached between 1.7 and 2.1 mm. The estimated Lc oocyte diameter average growth rate was 0.01 mm/day. Both, T and E2, increased together with the oocyte growing throughout the analyzed seasons. However, E2 variation was more significantly associated with the photoperiod than with the Lc oocyte size, whereas T was better associated with this last variable. Based on physiological evidence, mainly on the significant plasma level increase of both sex steroids observed in females captured in March, and also on the reproductive effort data, we suggest that: (1) specimens from March were presumably at a late vitellogenesis stage just prior to the oocyte final maturation, and thus L. nudifrons spawning period might onset in late MarchApril at SSI, (2) the inshore locality of PC is likely a spawning site for L. nudifrons, which reinforce the hypothesis that nearshore areas are spawning grounds for some 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: Elisio, Mariano. 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: 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 (COLACMAR)
Mar del Plata
Argentina
XVIII Congreso Latinoamericano de Ciencias del Mar
Materia
POTTER COVE
NOTOTHENIDAE
SEX STEROIDS
REPRODUCTIVE 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:11336/155903
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/155903
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network_name_str CONICET Digital (CONICET)
spelling New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidenceNovillo Estofan, Julio ManuelElisio, MarianoMoreira, María EugeniaMacchi, Gustavo JavierBarrera Oro, EstebanPOTTER COVENOTOTHENIDAESEX STEROIDSREPRODUCTIVE ECOLOGYhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The Southern Ocean marine ichthyofauna is dominated by a unique costal demersal fish group, the suborder Notothenioidei. The nototheniid Lepidonotothen nudifrons is abundant in nearshore waters of the Scotia Arc region, where it is ecologically important as relevant prey of piscivorous predators. The knowledge of its reproductive biology arises exclusively from macroscopic and histologic descriptions of the maturation cycle. In this study, we provide for first time in L. nudifrons adult females, information on oocyte growth rate and change in testosterone (T) and estradiol (E2) plasma levels throughout their ovarian growth period in summer. Briefly, 98 specimens were caught at Potter Cove (PC), South Shetland Islands (SSI), from November to late March in the consecutive campaigns 2016/2017- 2017/2018. Histological analysis of the ovaries confirmed the macroscopic characteristic of the two distinct cohorts of oocytes: one leading clutch (Lc) of large orange vitellogenic oocytes, likely to be spawned in the upcoming reproductive season, and a second clutch of smaller whitish previtellogenic oocytes. In late March, females (n=17) had gonado-somatic index values between 13 and 20% (16.73±2.10) and total fecundity ranged between 2196 and 4652 oocytes/female (3209± 740), while Lc oocytes reached between 1.7 and 2.1 mm. The estimated Lc oocyte diameter average growth rate was 0.01 mm/day. Both, T and E2, increased together with the oocyte growing throughout the analyzed seasons. However, E2 variation was more significantly associated with the photoperiod than with the Lc oocyte size, whereas T was better associated with this last variable. Based on physiological evidence, mainly on the significant plasma level increase of both sex steroids observed in females captured in March, and also on the reproductive effort data, we suggest that: (1) specimens from March were presumably at a late vitellogenesis stage just prior to the oocyte final maturation, and thus L. nudifrons spawning period might onset in late MarchApril at SSI, (2) the inshore locality of PC is likely a spawning site for L. nudifrons, which reinforce the hypothesis that nearshore areas are spawning grounds for some 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: Elisio, Mariano. 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: 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 Mar (COLACMAR)Mar del PlataArgentinaXVIII Congreso Latinoamericano de Ciencias del MarAsociación Latinoamericana de Investigadores en 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/pdfapplication/pdfhttp://hdl.handle.net/11336/155903New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence; XVIII Congreso Latinoamericano de Ciencias del Mar (COLACMAR); Mar del Plata; Argentina; 2019; 233-233CONICET DigitalCONICETspaAsociación Latinoamericana de Investigadores en Ciencias del Marinfo: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 Técnicas2025-09-03T09:50:21Zoai:ri.conicet.gov.ar:11336/155903instacron: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:34982025-09-03 09:50:21.671CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
title New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
spellingShingle New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
Novillo Estofan, Julio Manuel
POTTER COVE
NOTOTHENIDAE
SEX STEROIDS
REPRODUCTIVE ECOLOGY
title_short New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
title_full New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
title_fullStr New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
title_full_unstemmed New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
title_sort New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence
dc.creator.none.fl_str_mv Novillo Estofan, Julio Manuel
Elisio, Mariano
Moreira, María Eugenia
Macchi, Gustavo Javier
Barrera Oro, Esteban
author Novillo Estofan, Julio Manuel
author_facet Novillo Estofan, Julio Manuel
Elisio, Mariano
Moreira, María Eugenia
Macchi, Gustavo Javier
Barrera Oro, Esteban
author_role author
author2 Elisio, Mariano
Moreira, María Eugenia
Macchi, Gustavo Javier
Barrera Oro, Esteban
author2_role author
author
author
author
dc.subject.none.fl_str_mv POTTER COVE
NOTOTHENIDAE
SEX STEROIDS
REPRODUCTIVE ECOLOGY
topic POTTER COVE
NOTOTHENIDAE
SEX STEROIDS
REPRODUCTIVE 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 Southern Ocean marine ichthyofauna is dominated by a unique costal demersal fish group, the suborder Notothenioidei. The nototheniid Lepidonotothen nudifrons is abundant in nearshore waters of the Scotia Arc region, where it is ecologically important as relevant prey of piscivorous predators. The knowledge of its reproductive biology arises exclusively from macroscopic and histologic descriptions of the maturation cycle. In this study, we provide for first time in L. nudifrons adult females, information on oocyte growth rate and change in testosterone (T) and estradiol (E2) plasma levels throughout their ovarian growth period in summer. Briefly, 98 specimens were caught at Potter Cove (PC), South Shetland Islands (SSI), from November to late March in the consecutive campaigns 2016/2017- 2017/2018. Histological analysis of the ovaries confirmed the macroscopic characteristic of the two distinct cohorts of oocytes: one leading clutch (Lc) of large orange vitellogenic oocytes, likely to be spawned in the upcoming reproductive season, and a second clutch of smaller whitish previtellogenic oocytes. In late March, females (n=17) had gonado-somatic index values between 13 and 20% (16.73±2.10) and total fecundity ranged between 2196 and 4652 oocytes/female (3209± 740), while Lc oocytes reached between 1.7 and 2.1 mm. The estimated Lc oocyte diameter average growth rate was 0.01 mm/day. Both, T and E2, increased together with the oocyte growing throughout the analyzed seasons. However, E2 variation was more significantly associated with the photoperiod than with the Lc oocyte size, whereas T was better associated with this last variable. Based on physiological evidence, mainly on the significant plasma level increase of both sex steroids observed in females captured in March, and also on the reproductive effort data, we suggest that: (1) specimens from March were presumably at a late vitellogenesis stage just prior to the oocyte final maturation, and thus L. nudifrons spawning period might onset in late MarchApril at SSI, (2) the inshore locality of PC is likely a spawning site for L. nudifrons, which reinforce the hypothesis that nearshore areas are spawning grounds for some 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: Elisio, Mariano. 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: 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 (COLACMAR)
Mar del Plata
Argentina
XVIII Congreso Latinoamericano de Ciencias del Mar
description The Southern Ocean marine ichthyofauna is dominated by a unique costal demersal fish group, the suborder Notothenioidei. The nototheniid Lepidonotothen nudifrons is abundant in nearshore waters of the Scotia Arc region, where it is ecologically important as relevant prey of piscivorous predators. The knowledge of its reproductive biology arises exclusively from macroscopic and histologic descriptions of the maturation cycle. In this study, we provide for first time in L. nudifrons adult females, information on oocyte growth rate and change in testosterone (T) and estradiol (E2) plasma levels throughout their ovarian growth period in summer. Briefly, 98 specimens were caught at Potter Cove (PC), South Shetland Islands (SSI), from November to late March in the consecutive campaigns 2016/2017- 2017/2018. Histological analysis of the ovaries confirmed the macroscopic characteristic of the two distinct cohorts of oocytes: one leading clutch (Lc) of large orange vitellogenic oocytes, likely to be spawned in the upcoming reproductive season, and a second clutch of smaller whitish previtellogenic oocytes. In late March, females (n=17) had gonado-somatic index values between 13 and 20% (16.73±2.10) and total fecundity ranged between 2196 and 4652 oocytes/female (3209± 740), while Lc oocytes reached between 1.7 and 2.1 mm. The estimated Lc oocyte diameter average growth rate was 0.01 mm/day. Both, T and E2, increased together with the oocyte growing throughout the analyzed seasons. However, E2 variation was more significantly associated with the photoperiod than with the Lc oocyte size, whereas T was better associated with this last variable. Based on physiological evidence, mainly on the significant plasma level increase of both sex steroids observed in females captured in March, and also on the reproductive effort data, we suggest that: (1) specimens from March were presumably at a late vitellogenesis stage just prior to the oocyte final maturation, and thus L. nudifrons spawning period might onset in late MarchApril at SSI, (2) the inshore locality of PC is likely a spawning site for L. nudifrons, which reinforce the hypothesis that nearshore areas are spawning grounds for some notothenioids.
publishDate 2019
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status_str publishedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/155903
New insights on reproductive features in Lepidonotothen nudifrons (Pisces, Notothenioidei) at the south Shetland Island, supported by physiological evidence; XVIII Congreso Latinoamericano de Ciencias del Mar (COLACMAR); Mar del Plata; Argentina; 2019; 233-233
CONICET Digital
CONICET
url http://hdl.handle.net/11336/155903
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CONICET Digital
CONICET
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