Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)

Autores
Antacli, Julieta Carolina; Sabatini, Marina Elena; Silva, Ricardo I.; Hernández, Daniel R.; Jaureguizar, Andrés Javier; Akselman Cardella, Rut
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the most abundant copepodite stages. Diet composition was also studied in adult females. Female reproductive status was evaluated by gonad staging. Despite generally low feeding conditions and decreasing seasonal temperature, both copepods fed to some degree. The most numerous copepodites and adult females of both species showed similarly low feeding activity. About half of the adult females of the two species and C5s of C. australis contained food in their guts, but the proportion of fed C4-females of D. forcipatus was much lower. All copepods were generally feeding at low or intermediate levels. Gonad stage distribution and population structure showed low but still ongoing reproduction in both species. Gut content findings suggest a preference for smaller nanoplanktonic particles, especially dinoflagellates by D. forcipatus, and for autotrophic prey, particularly large diatoms by C. australis. The feeding and reproduction patterns of the two copepods were likely influenced by the distributions of potential food resources and temperature.
Drepanopus forcipatus e Calanus australis são copépodos planctônicos relevantes na plataforma da Patagônia Austral. Seus padrões de alimentação, reprodução e status populacional foram investigados durante o fim do verão, quando as condições ambientais podem ser críticas. A presença de alimento no abdomen e o tamanho das pelotas alimentares foram registados em fêmeas adultas e nos estágios mais abundantes de copepodito. A composição da dieta também foi estudada em fêmeas adultas. O status reprodutivo das fêmeas foi avaliado através do estágio gonadal. De modo geral, apesar das baixas condições alimentares e diminuição sazonal da temperatura, ambos os copépodos se alimentaram. Os copepoditos mais numerosos e as fêmeas adultas de ambas espécies mostraram baixa atividade alimentar. Cerca de metade das fêmeas adultas das duas espécies e C5s de C. australis apresentaram alimento em seu intestino, porém a proporção de fêmeas D. forcipatus C4 alimentadas foi consideravelmente menor. De modo geral, todos os copépodos se alimentaram entre níveis baixo e intermediário. A distribuição do estágio gonadal e a estrutura populacional apresentaram reprodução baixa, mas contínua para ambas as espécies. Os alimentos encontrados no intestino sugerem uma preferência por partículas nanoplanctônicas, especialmente dinoflagelatos em D. forcipatus, e por presas autotróficas, particularmente grandes diatomáceas em C. australis. Os padrões de alimentação e reprodução dos dois copépodos foram provavelmente influenciados pela distribuição de recursos alimentares e temperatura.
Fil: Antacli, Julieta Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Sabatini, Marina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Silva, Ricardo I.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Hernández, Daniel R.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Jaureguizar, Andrés Javier. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Akselman Cardella, Rut. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Materia
Drepanopus forcipatus
Calanus australis
Feeding
Reproduction
Southern Patagonian shelf
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:11336/35355
Acceder
id CONICETDig_c7383fcfb88a8518e289386d2069de9f
oai_identifier_str oai:ri.conicet.gov.ar:11336/35355
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)Antacli, Julieta CarolinaSabatini, Marina ElenaSilva, Ricardo I.Hernández, Daniel R.Jaureguizar, Andrés JavierAkselman Cardella, RutDrepanopus forcipatusCalanus australisFeedingReproductionSouthern Patagonian shelfhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the most abundant copepodite stages. Diet composition was also studied in adult females. Female reproductive status was evaluated by gonad staging. Despite generally low feeding conditions and decreasing seasonal temperature, both copepods fed to some degree. The most numerous copepodites and adult females of both species showed similarly low feeding activity. About half of the adult females of the two species and C5s of C. australis contained food in their guts, but the proportion of fed C4-females of D. forcipatus was much lower. All copepods were generally feeding at low or intermediate levels. Gonad stage distribution and population structure showed low but still ongoing reproduction in both species. Gut content findings suggest a preference for smaller nanoplanktonic particles, especially dinoflagellates by D. forcipatus, and for autotrophic prey, particularly large diatoms by C. australis. The feeding and reproduction patterns of the two copepods were likely influenced by the distributions of potential food resources and temperature.Drepanopus forcipatus e Calanus australis são copépodos planctônicos relevantes na plataforma da Patagônia Austral. Seus padrões de alimentação, reprodução e status populacional foram investigados durante o fim do verão, quando as condições ambientais podem ser críticas. A presença de alimento no abdomen e o tamanho das pelotas alimentares foram registados em fêmeas adultas e nos estágios mais abundantes de copepodito. A composição da dieta também foi estudada em fêmeas adultas. O status reprodutivo das fêmeas foi avaliado através do estágio gonadal. De modo geral, apesar das baixas condições alimentares e diminuição sazonal da temperatura, ambos os copépodos se alimentaram. Os copepoditos mais numerosos e as fêmeas adultas de ambas espécies mostraram baixa atividade alimentar. Cerca de metade das fêmeas adultas das duas espécies e C5s de C. australis apresentaram alimento em seu intestino, porém a proporção de fêmeas D. forcipatus C4 alimentadas foi consideravelmente menor. De modo geral, todos os copépodos se alimentaram entre níveis baixo e intermediário. A distribuição do estágio gonadal e a estrutura populacional apresentaram reprodução baixa, mas contínua para ambas as espécies. Os alimentos encontrados no intestino sugerem uma preferência por partículas nanoplanctônicas, especialmente dinoflagelatos em D. forcipatus, e por presas autotróficas, particularmente grandes diatomáceas em C. australis. Os padrões de alimentação e reprodução dos dois copépodos foram provavelmente influenciados pela distribuição de recursos alimentares e temperatura.Fil: Antacli, Julieta Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Sabatini, Marina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Silva, Ricardo I.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Hernández, Daniel R.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Jaureguizar, Andrés Javier. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Akselman Cardella, Rut. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaInstituto Oceanográfico2014-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/35355Antacli, Julieta Carolina; Sabatini, Marina Elena; Silva, Ricardo I.; Hernández, Daniel R.; Jaureguizar, Andrés Javier; et al.; Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S); Instituto Oceanográfico; Brazilian Journal of Oceanography; 62; 4; 10-2014; 295-3141679-87591982-436XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1590/S1679-87592014073406204info:eu-repo/semantics/altIdentifier/url/http://ref.scielo.org/9x7mqjinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:20:23Zoai:ri.conicet.gov.ar:11336/35355instacron: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 14:20:24.03CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
title Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
spellingShingle Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
Antacli, Julieta Carolina
Drepanopus forcipatus
Calanus australis
Feeding
Reproduction
Southern Patagonian shelf
title_short Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
title_full Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
title_fullStr Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
title_full_unstemmed Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
title_sort Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S)
dc.creator.none.fl_str_mv Antacli, Julieta Carolina
Sabatini, Marina Elena
Silva, Ricardo I.
Hernández, Daniel R.
Jaureguizar, Andrés Javier
Akselman Cardella, Rut
author Antacli, Julieta Carolina
author_facet Antacli, Julieta Carolina
Sabatini, Marina Elena
Silva, Ricardo I.
Hernández, Daniel R.
Jaureguizar, Andrés Javier
Akselman Cardella, Rut
author_role author
author2 Sabatini, Marina Elena
Silva, Ricardo I.
Hernández, Daniel R.
Jaureguizar, Andrés Javier
Akselman Cardella, Rut
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Drepanopus forcipatus
Calanus australis
Feeding
Reproduction
Southern Patagonian shelf
topic Drepanopus forcipatus
Calanus australis
Feeding
Reproduction
Southern Patagonian shelf
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the most abundant copepodite stages. Diet composition was also studied in adult females. Female reproductive status was evaluated by gonad staging. Despite generally low feeding conditions and decreasing seasonal temperature, both copepods fed to some degree. The most numerous copepodites and adult females of both species showed similarly low feeding activity. About half of the adult females of the two species and C5s of C. australis contained food in their guts, but the proportion of fed C4-females of D. forcipatus was much lower. All copepods were generally feeding at low or intermediate levels. Gonad stage distribution and population structure showed low but still ongoing reproduction in both species. Gut content findings suggest a preference for smaller nanoplanktonic particles, especially dinoflagellates by D. forcipatus, and for autotrophic prey, particularly large diatoms by C. australis. The feeding and reproduction patterns of the two copepods were likely influenced by the distributions of potential food resources and temperature.
Drepanopus forcipatus e Calanus australis são copépodos planctônicos relevantes na plataforma da Patagônia Austral. Seus padrões de alimentação, reprodução e status populacional foram investigados durante o fim do verão, quando as condições ambientais podem ser críticas. A presença de alimento no abdomen e o tamanho das pelotas alimentares foram registados em fêmeas adultas e nos estágios mais abundantes de copepodito. A composição da dieta também foi estudada em fêmeas adultas. O status reprodutivo das fêmeas foi avaliado através do estágio gonadal. De modo geral, apesar das baixas condições alimentares e diminuição sazonal da temperatura, ambos os copépodos se alimentaram. Os copepoditos mais numerosos e as fêmeas adultas de ambas espécies mostraram baixa atividade alimentar. Cerca de metade das fêmeas adultas das duas espécies e C5s de C. australis apresentaram alimento em seu intestino, porém a proporção de fêmeas D. forcipatus C4 alimentadas foi consideravelmente menor. De modo geral, todos os copépodos se alimentaram entre níveis baixo e intermediário. A distribuição do estágio gonadal e a estrutura populacional apresentaram reprodução baixa, mas contínua para ambas as espécies. Os alimentos encontrados no intestino sugerem uma preferência por partículas nanoplanctônicas, especialmente dinoflagelatos em D. forcipatus, e por presas autotróficas, particularmente grandes diatomáceas em C. australis. Os padrões de alimentação e reprodução dos dois copépodos foram provavelmente influenciados pela distribuição de recursos alimentares e temperatura.
Fil: Antacli, Julieta Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Sabatini, Marina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Silva, Ricardo I.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Hernández, Daniel R.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Jaureguizar, Andrés Javier. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Akselman Cardella, Rut. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
description Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the most abundant copepodite stages. Diet composition was also studied in adult females. Female reproductive status was evaluated by gonad staging. Despite generally low feeding conditions and decreasing seasonal temperature, both copepods fed to some degree. The most numerous copepodites and adult females of both species showed similarly low feeding activity. About half of the adult females of the two species and C5s of C. australis contained food in their guts, but the proportion of fed C4-females of D. forcipatus was much lower. All copepods were generally feeding at low or intermediate levels. Gonad stage distribution and population structure showed low but still ongoing reproduction in both species. Gut content findings suggest a preference for smaller nanoplanktonic particles, especially dinoflagellates by D. forcipatus, and for autotrophic prey, particularly large diatoms by C. australis. The feeding and reproduction patterns of the two copepods were likely influenced by the distributions of potential food resources and temperature.
publishDate 2014
dc.date.none.fl_str_mv 2014-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/35355
Antacli, Julieta Carolina; Sabatini, Marina Elena; Silva, Ricardo I.; Hernández, Daniel R.; Jaureguizar, Andrés Javier; et al.; Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S); Instituto Oceanográfico; Brazilian Journal of Oceanography; 62; 4; 10-2014; 295-314
1679-8759
1982-436X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/35355
identifier_str_mv Antacli, Julieta Carolina; Sabatini, Marina Elena; Silva, Ricardo I.; Hernández, Daniel R.; Jaureguizar, Andrés Javier; et al.; Feeding and reproductive activity of the copepods Drepanopus forcipatus and calanus australis during late summer on the southern patagonian shelf (Argentina, 47°-55°S); Instituto Oceanográfico; Brazilian Journal of Oceanography; 62; 4; 10-2014; 295-314
1679-8759
1982-436X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1590/S1679-87592014073406204
info:eu-repo/semantics/altIdentifier/url/http://ref.scielo.org/9x7mqj
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Instituto Oceanográfico
publisher.none.fl_str_mv Instituto Oceanográfico
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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score 13.22299

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