Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer

Autores
Daneri, Gustavo Adolfo; Negri, Agustina; Coria, Néstor Rubén; Negrete, Javier; Libertelli, Marcela M.; Corbalán, A.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The study of the feeding habits of Weddell seals, Leptonychotes weddellii, in the area of west Antarctic Peninsula is essential to understand the role they play in the marine food webs, especially considering that this is one of the regions most affected by climate change. With the aim of detecting temporal changes in the fish predation pattern of seals, a total of 217 scats were collected at Hope Bay, during three consecutive summers (2003, 2004 and 2005). The family Nototheniidae comprised over 80% in numbers of fish preyed by seals. The Antarctic silverfish, Pleuragramma antarctica, was, by far, the most frequent and abundant prey species with a mean percentage frequency of occurrence of 48.7% and representing in average 52.1% in numbers of the fish consumed by seals. Other fish species of lesser importance were the nototheniids Trematomus newnesi, Lepidonotothen larseni, Gobionotothen gibberifrons and the channichthyid Chionodraco rastrospinosus. Temporal variation was observed not only in the relative proportions of the different fish prey taxa but also in the sizes of the dominant prey, P. antarctica. Given the high trophic vulnerability of this species to changes in abiotic factors and food web structure and dynamics, a possible influence of El Nino Southern Oscillation events of 2002–2003 and 2004–2005 should not be discarded. Moreover, special attention should be addressed to its population status, distribution and spatial/temporal availability as prey resource of upper trophic level consumers such as L. weddellii which largely depend on P. antarctica.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Leptonychotes
Fish
Diet
Pleuragramma
Antarctic Peninsula
ENSO
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/134062

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spelling Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summerDaneri, Gustavo AdolfoNegri, AgustinaCoria, Néstor RubénNegrete, JavierLibertelli, Marcela M.Corbalán, A.Ciencias NaturalesLeptonychotesFishDietPleuragrammaAntarctic PeninsulaENSOThe study of the feeding habits of Weddell seals, <i>Leptonychotes weddellii</i>, in the area of west Antarctic Peninsula is essential to understand the role they play in the marine food webs, especially considering that this is one of the regions most affected by climate change. With the aim of detecting temporal changes in the fish predation pattern of seals, a total of 217 scats were collected at Hope Bay, during three consecutive summers (2003, 2004 and 2005). The family Nototheniidae comprised over 80% in numbers of fish preyed by seals. The Antarctic silverfish, <i>Pleuragramma antarctica</i>, was, by far, the most frequent and abundant prey species with a mean percentage frequency of occurrence of 48.7% and representing in average 52.1% in numbers of the fish consumed by seals. Other fish species of lesser importance were the nototheniids <i>Trematomus newnesi</i>, <i>Lepidonotothen larseni</i>, <i>Gobionotothen gibberifrons</i> and the channichthyid <i>Chionodraco rastrospinosus</i>. Temporal variation was observed not only in the relative proportions of the different fish prey taxa but also in the sizes of the dominant prey, <i>P. antarctica</i>. Given the high trophic vulnerability of this species to changes in abiotic factors and food web structure and dynamics, a possible influence of El Nino Southern Oscillation events of 2002–2003 and 2004–2005 should not be discarded. Moreover, special attention should be addressed to its population status, distribution and spatial/temporal availability as prey resource of upper trophic level consumers such as <i>L. weddellii</i> which largely depend on <i>P. antarctica</i>.Facultad de Ciencias Naturales y Museo2018-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1027-1031http://sedici.unlp.edu.ar/handle/10915/134062enginfo:eu-repo/semantics/altIdentifier/issn/0722-4060info:eu-repo/semantics/altIdentifier/issn/1432-2056info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-018-2255-zinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:31:56Zoai:sedici.unlp.edu.ar:10915/134062Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:31:57.185SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
title Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
spellingShingle Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
Daneri, Gustavo Adolfo
Ciencias Naturales
Leptonychotes
Fish
Diet
Pleuragramma
Antarctic Peninsula
ENSO
title_short Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
title_full Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
title_fullStr Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
title_full_unstemmed Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
title_sort Fish prey of Weddell seals, <i>Leptonychotes weddellii</i>, at Hope Bay, Antarctic Peninsula, during the late summer
dc.creator.none.fl_str_mv Daneri, Gustavo Adolfo
Negri, Agustina
Coria, Néstor Rubén
Negrete, Javier
Libertelli, Marcela M.
Corbalán, A.
author Daneri, Gustavo Adolfo
author_facet Daneri, Gustavo Adolfo
Negri, Agustina
Coria, Néstor Rubén
Negrete, Javier
Libertelli, Marcela M.
Corbalán, A.
author_role author
author2 Negri, Agustina
Coria, Néstor Rubén
Negrete, Javier
Libertelli, Marcela M.
Corbalán, A.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Leptonychotes
Fish
Diet
Pleuragramma
Antarctic Peninsula
ENSO
topic Ciencias Naturales
Leptonychotes
Fish
Diet
Pleuragramma
Antarctic Peninsula
ENSO
dc.description.none.fl_txt_mv The study of the feeding habits of Weddell seals, <i>Leptonychotes weddellii</i>, in the area of west Antarctic Peninsula is essential to understand the role they play in the marine food webs, especially considering that this is one of the regions most affected by climate change. With the aim of detecting temporal changes in the fish predation pattern of seals, a total of 217 scats were collected at Hope Bay, during three consecutive summers (2003, 2004 and 2005). The family Nototheniidae comprised over 80% in numbers of fish preyed by seals. The Antarctic silverfish, <i>Pleuragramma antarctica</i>, was, by far, the most frequent and abundant prey species with a mean percentage frequency of occurrence of 48.7% and representing in average 52.1% in numbers of the fish consumed by seals. Other fish species of lesser importance were the nototheniids <i>Trematomus newnesi</i>, <i>Lepidonotothen larseni</i>, <i>Gobionotothen gibberifrons</i> and the channichthyid <i>Chionodraco rastrospinosus</i>. Temporal variation was observed not only in the relative proportions of the different fish prey taxa but also in the sizes of the dominant prey, <i>P. antarctica</i>. Given the high trophic vulnerability of this species to changes in abiotic factors and food web structure and dynamics, a possible influence of El Nino Southern Oscillation events of 2002–2003 and 2004–2005 should not be discarded. Moreover, special attention should be addressed to its population status, distribution and spatial/temporal availability as prey resource of upper trophic level consumers such as <i>L. weddellii</i> which largely depend on <i>P. antarctica</i>.
Facultad de Ciencias Naturales y Museo
description The study of the feeding habits of Weddell seals, <i>Leptonychotes weddellii</i>, in the area of west Antarctic Peninsula is essential to understand the role they play in the marine food webs, especially considering that this is one of the regions most affected by climate change. With the aim of detecting temporal changes in the fish predation pattern of seals, a total of 217 scats were collected at Hope Bay, during three consecutive summers (2003, 2004 and 2005). The family Nototheniidae comprised over 80% in numbers of fish preyed by seals. The Antarctic silverfish, <i>Pleuragramma antarctica</i>, was, by far, the most frequent and abundant prey species with a mean percentage frequency of occurrence of 48.7% and representing in average 52.1% in numbers of the fish consumed by seals. Other fish species of lesser importance were the nototheniids <i>Trematomus newnesi</i>, <i>Lepidonotothen larseni</i>, <i>Gobionotothen gibberifrons</i> and the channichthyid <i>Chionodraco rastrospinosus</i>. Temporal variation was observed not only in the relative proportions of the different fish prey taxa but also in the sizes of the dominant prey, <i>P. antarctica</i>. Given the high trophic vulnerability of this species to changes in abiotic factors and food web structure and dynamics, a possible influence of El Nino Southern Oscillation events of 2002–2003 and 2004–2005 should not be discarded. Moreover, special attention should be addressed to its population status, distribution and spatial/temporal availability as prey resource of upper trophic level consumers such as <i>L. weddellii</i> which largely depend on <i>P. antarctica</i>.
publishDate 2018
dc.date.none.fl_str_mv 2018-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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status_str publishedVersion
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info:eu-repo/semantics/altIdentifier/issn/1432-2056
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-018-2255-z
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
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