The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands
The Southern elephant seal (Mirounga leonina) is a major consumer from the Southern Ocean. This species is highly sexually dimorphic and frequently exhibits resource partitioning according to sex and/or age classes. This study analysed the feeding habits of the M. leonina population from Isla 25 de...
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ftconicet:oai:ri.conicet.gov.ar:11336/62264 2023-10-09T21:45:45+02:00 The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands Daneri, Gustavo Adolfo Carlini, A.R. Marschoff, Enrique Ricardo Harrington, Ana Negrete, Javier Mennucci, J.A. Márquez, M. E. I. application/pdf http://hdl.handle.net/11336/62264 eng eng Springer info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00300-014-1629-0 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-014-1629-0 http://hdl.handle.net/11336/62264 Daneri, Gustavo Adolfo; Carlini, A.R.; Marschoff, Enrique Ricardo; Harrington, Ana; Negrete, Javier; et al.; The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands; Springer; Polar Biology; 38; 5; 5-2015; 665-676 0722-4060 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Antarctica Cephalopods Diet Fish Mirounga Leonina South Shetlands https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s00300-014-1629-0 2023-09-24T20:28:47Z The Southern elephant seal (Mirounga leonina) is a major consumer from the Southern Ocean. This species is highly sexually dimorphic and frequently exhibits resource partitioning according to sex and/or age classes. This study analysed the feeding habits of the M. leonina population from Isla 25 de mayo (King George Island) in the spring/summer seasons of 1995/1996–2002/2003. A total of 232 individuals from different sex-age groups were stomach lavaged. The analysis of stomach samples showed that cephalopods were the main prey followed by fish, their frequency of occurrence being 98.1 and 17.9 % respectively. Cephalopods were dominated by the Antarctic glacial squid, Psychroteuthis glacialis, which occurred in 83 % of samples, constituting 57.2 % in numbers and 61.3 % in mass. Octopods were of lesser relevance, occurring in 18 % of samples, but became more important in the diet of male individuals. Juvenile seals fed on a lower variety of cephalopod prey than older ones. This would coincide with the diving pattern characteristic of the different sex-age categories of seals. The predominance of P. glacialis might be associated with the more southerly location of the foraging areas of this population compared to others. Fish were largely represented by the myctophid Gymnoscopelus nicholsi, which occurred in 81.3 % of samples containing otoliths and constituted 76.4 % in numbers and 66.4 % in mass. However, while myctophids may be the dominant fish prey of elephant seals in areas close to the South Shetlands, they would be probably replaced by P. antarcticum as seals migrate towards higher latitudes. Fil: Daneri, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina Fil: Carlini, A.R. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Dirección Nacional del Antártico Elephant Seal Elephant Seals Isla 25 de Mayo King George Island Mirounga leonina Polar Biology South Shetland Islands Southern Elephant Seal Southern Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Southern Ocean The Antarctic King George Island South Shetland Islands Argentino Argentina 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Gustavo ENVELOPE(-62.917,-62.917,-64.833,-64.833) isla 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Polar Biology 38 5 665 676 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Antarctica Cephalopods Diet Fish Mirounga Leonina South Shetlands https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Antarctica Cephalopods Diet Fish Mirounga Leonina South Shetlands https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Daneri, Gustavo Adolfo Carlini, A.R. Marschoff, Enrique Ricardo Harrington, Ana Negrete, Javier Mennucci, J.A. Márquez, M. E. I. The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands |
topic_facet |
Antarctica Cephalopods Diet Fish Mirounga Leonina South Shetlands https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The Southern elephant seal (Mirounga leonina) is a major consumer from the Southern Ocean. This species is highly sexually dimorphic and frequently exhibits resource partitioning according to sex and/or age classes. This study analysed the feeding habits of the M. leonina population from Isla 25 de mayo (King George Island) in the spring/summer seasons of 1995/1996–2002/2003. A total of 232 individuals from different sex-age groups were stomach lavaged. The analysis of stomach samples showed that cephalopods were the main prey followed by fish, their frequency of occurrence being 98.1 and 17.9 % respectively. Cephalopods were dominated by the Antarctic glacial squid, Psychroteuthis glacialis, which occurred in 83 % of samples, constituting 57.2 % in numbers and 61.3 % in mass. Octopods were of lesser relevance, occurring in 18 % of samples, but became more important in the diet of male individuals. Juvenile seals fed on a lower variety of cephalopod prey than older ones. This would coincide with the diving pattern characteristic of the different sex-age categories of seals. The predominance of P. glacialis might be associated with the more southerly location of the foraging areas of this population compared to others. Fish were largely represented by the myctophid Gymnoscopelus nicholsi, which occurred in 81.3 % of samples containing otoliths and constituted 76.4 % in numbers and 66.4 % in mass. However, while myctophids may be the dominant fish prey of elephant seals in areas close to the South Shetlands, they would be probably replaced by P. antarcticum as seals migrate towards higher latitudes. Fil: Daneri, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina Fil: Carlini, A.R. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto ... |
format |
Article in Journal/Newspaper |
author |
Daneri, Gustavo Adolfo Carlini, A.R. Marschoff, Enrique Ricardo Harrington, Ana Negrete, Javier Mennucci, J.A. Márquez, M. E. I. |
author_facet |
Daneri, Gustavo Adolfo Carlini, A.R. Marschoff, Enrique Ricardo Harrington, Ana Negrete, Javier Mennucci, J.A. Márquez, M. E. I. |
author_sort |
Daneri, Gustavo Adolfo |
title |
The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands |
title_short |
The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands |
title_full |
The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands |
title_fullStr |
The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands |
title_full_unstemmed |
The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands |
title_sort |
feeding habits of the southern elephant seal, mirounga leonina, at isla 25 de mayo/king george island, south shetland islands |
publisher |
Springer |
url |
http://hdl.handle.net/11336/62264 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-62.917,-62.917,-64.833,-64.833) ENVELOPE(-58.000,-58.000,-62.083,-62.083) |
geographic |
Antarctic Southern Ocean The Antarctic King George Island South Shetland Islands Argentino Argentina 25 de Mayo Gustavo isla 25 de Mayo |
geographic_facet |
Antarctic Southern Ocean The Antarctic King George Island South Shetland Islands Argentino Argentina 25 de Mayo Gustavo isla 25 de Mayo |
genre |
Antarc* Antarctic Antarctica Dirección Nacional del Antártico Elephant Seal Elephant Seals Isla 25 de Mayo King George Island Mirounga leonina Polar Biology South Shetland Islands Southern Elephant Seal Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Dirección Nacional del Antártico Elephant Seal Elephant Seals Isla 25 de Mayo King George Island Mirounga leonina Polar Biology South Shetland Islands Southern Elephant Seal Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00300-014-1629-0 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-014-1629-0 http://hdl.handle.net/11336/62264 Daneri, Gustavo Adolfo; Carlini, A.R.; Marschoff, Enrique Ricardo; Harrington, Ana; Negrete, Javier; et al.; The feeding habits of the Southern elephant seal, Mirounga leonina, at Isla 25 de Mayo/King George Island, South Shetland Islands; Springer; Polar Biology; 38; 5; 5-2015; 665-676 0722-4060 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s00300-014-1629-0 |
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Polar Biology |
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38 |
container_issue |
5 |
container_start_page |
665 |
op_container_end_page |
676 |
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1779321404379889664 |