Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands
The aim of the present study was to enhance the knowledge of the feeding habits of the juvenile component of the population of Southern elephant seals [Mirounga leonina (Linnaeus, 1758)] from Isla 25 de Mayo, South Shetland Islands, age class whose diet information is scarce. A total of 60 individua...
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Fundaçao Zoobotanica Rio Grande Sul
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ftconicet:oai:ri.conicet.gov.ar:11336/135750 2023-10-09T21:47:13+02:00 Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands Cephalopoda como presa de juveniles de elefantes marinos del sur en la Isla 25 de Mayo/King George, Islas Shetland del Sur Burdman, Luciana Daneri, Gustavo Adolfo Negrete, Javier Mennucci, Jorge Augusto Márquez, María Elba Isabel application/pdf http://hdl.handle.net/11336/135750 eng eng Fundaçao Zoobotanica Rio Grande Sul info:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/isz/a/bPC9ksJf8jRVjwryPLs5Lhk/?lang=en info:eu-repo/semantics/altIdentifier/doi/10.1590/1678-4766201510511219 http://hdl.handle.net/11336/135750 Burdman, Luciana; Daneri, Gustavo Adolfo; Negrete, Javier; Mennucci, Jorge Augusto; Márquez, María Elba Isabel; Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands; Fundaçao Zoobotanica Rio Grande Sul; Iheringia. Série Zoologia; 105; 1; 3-2015; 12-19 0073-4721 1678-4766 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ ANTARCTICA DIET MIROUNGA 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/10.1590/1678-4766201510511219 2023-09-24T19:51:42Z The aim of the present study was to enhance the knowledge of the feeding habits of the juvenile component of the population of Southern elephant seals [Mirounga leonina (Linnaeus, 1758)] from Isla 25 de Mayo, South Shetland Islands, age class whose diet information is scarce. A total of 60 individuals were stomach lavaged in the spring - summer seasons of three consecutive years (2003, 2004 and 2005) of which 53.3% (n = 32) presented food remnants. The Antarctic glacial squid Psychroteuthis glacialis Thiele, 1921 was the dominant prey taxon in terms of frequency of occurrence (68.7%), numerical abundance (60.1%) and biomass (51.5%), contributing 84.1% to the total relative importance index. Other squid prey species of importance were Slosarczykovia circumantartica Lipinski, 2001 in terms of occurrence (37.5%) and numerical abundance (14%) and Moroteuthis knipovitchi Filippova, 1972 in terms of biomass (16%). All identifed cephalopod prey taxa are distributed south of the Antarctic Polar Front, except for the squid Martialia hyadesi Rochebrune & Mabille, 1889 which has a circumpolar distribution associated to the Polar Frontal Zone. No signifcant differences in the sizes of P. glacialis preyed upon by elephant seals were found between sexes and years. However, signifcant interannual differences were found in the taxonomical composition of their diet. This would be associated with temporal changes in food availability at the foraging areas of seals, which in turn may have been infuenced by changes in oceanographic conditions as a result of the El Niño Southern Oscillation (ENSO) phenomenon that occurred during part of the study period. Furthermore, a differential response of males and females to this temporal variation was observed, with the former being also associated to a predation on octopods. This would suggest a sexual segregation in foraging habits of this species from the early stages of its life cycle. El objetivo del presente estudio fue el de incrementar el conocimiento de los hábitos alimentarios ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Elephant Seals Isla 25 de Mayo Mirounga leonina South Shetland Islands Southern Elephant Seals CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Antarctic Filippova ENVELOPE(-146.000,-146.000,-77.667,-77.667) isla 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) islas Shetland del Sur ENVELOPE(-58.000,-58.000,-62.000,-62.000) Shetland del Sur ENVELOPE(-58.000,-58.000,-62.000,-62.000) South Shetland Islands The Antarctic Iheringia. Série Zoologia 105 1 12 19 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ANTARCTICA DIET MIROUNGA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
ANTARCTICA DIET MIROUNGA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Burdman, Luciana Daneri, Gustavo Adolfo Negrete, Javier Mennucci, Jorge Augusto Márquez, María Elba Isabel Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands |
topic_facet |
ANTARCTICA DIET MIROUNGA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The aim of the present study was to enhance the knowledge of the feeding habits of the juvenile component of the population of Southern elephant seals [Mirounga leonina (Linnaeus, 1758)] from Isla 25 de Mayo, South Shetland Islands, age class whose diet information is scarce. A total of 60 individuals were stomach lavaged in the spring - summer seasons of three consecutive years (2003, 2004 and 2005) of which 53.3% (n = 32) presented food remnants. The Antarctic glacial squid Psychroteuthis glacialis Thiele, 1921 was the dominant prey taxon in terms of frequency of occurrence (68.7%), numerical abundance (60.1%) and biomass (51.5%), contributing 84.1% to the total relative importance index. Other squid prey species of importance were Slosarczykovia circumantartica Lipinski, 2001 in terms of occurrence (37.5%) and numerical abundance (14%) and Moroteuthis knipovitchi Filippova, 1972 in terms of biomass (16%). All identifed cephalopod prey taxa are distributed south of the Antarctic Polar Front, except for the squid Martialia hyadesi Rochebrune & Mabille, 1889 which has a circumpolar distribution associated to the Polar Frontal Zone. No signifcant differences in the sizes of P. glacialis preyed upon by elephant seals were found between sexes and years. However, signifcant interannual differences were found in the taxonomical composition of their diet. This would be associated with temporal changes in food availability at the foraging areas of seals, which in turn may have been infuenced by changes in oceanographic conditions as a result of the El Niño Southern Oscillation (ENSO) phenomenon that occurred during part of the study period. Furthermore, a differential response of males and females to this temporal variation was observed, with the former being also associated to a predation on octopods. This would suggest a sexual segregation in foraging habits of this species from the early stages of its life cycle. El objetivo del presente estudio fue el de incrementar el conocimiento de los hábitos alimentarios ... |
format |
Article in Journal/Newspaper |
author |
Burdman, Luciana Daneri, Gustavo Adolfo Negrete, Javier Mennucci, Jorge Augusto Márquez, María Elba Isabel |
author_facet |
Burdman, Luciana Daneri, Gustavo Adolfo Negrete, Javier Mennucci, Jorge Augusto Márquez, María Elba Isabel |
author_sort |
Burdman, Luciana |
title |
Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands |
title_short |
Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands |
title_full |
Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands |
title_fullStr |
Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands |
title_full_unstemmed |
Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands |
title_sort |
cephalopoda as prey of juvenile southern elephant seals at isla 25 de mayo/king george, south shetland islands |
publisher |
Fundaçao Zoobotanica Rio Grande Sul |
url |
http://hdl.handle.net/11336/135750 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-146.000,-146.000,-77.667,-77.667) ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-58.000,-58.000,-62.000,-62.000) ENVELOPE(-58.000,-58.000,-62.000,-62.000) |
geographic |
25 de Mayo Antarctic Filippova isla 25 de Mayo islas Shetland del Sur Shetland del Sur South Shetland Islands The Antarctic |
geographic_facet |
25 de Mayo Antarctic Filippova isla 25 de Mayo islas Shetland del Sur Shetland del Sur South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctica Elephant Seals Isla 25 de Mayo Mirounga leonina South Shetland Islands Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Antarctica Elephant Seals Isla 25 de Mayo Mirounga leonina South Shetland Islands Southern Elephant Seals |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/isz/a/bPC9ksJf8jRVjwryPLs5Lhk/?lang=en info:eu-repo/semantics/altIdentifier/doi/10.1590/1678-4766201510511219 http://hdl.handle.net/11336/135750 Burdman, Luciana; Daneri, Gustavo Adolfo; Negrete, Javier; Mennucci, Jorge Augusto; Márquez, María Elba Isabel; Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands; Fundaçao Zoobotanica Rio Grande Sul; Iheringia. Série Zoologia; 105; 1; 3-2015; 12-19 0073-4721 1678-4766 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ |
op_doi |
https://doi.org/10.1590/1678-4766201510511219 |
container_title |
Iheringia. Série Zoologia |
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105 |
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12 |
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1779310164768194560 |