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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/35355
Ver los metadatos del registro completo
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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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1846082578562416640 |
score |
13.22299 |