Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula
Cephalopods play a key role in marine environments as food resources for top predators such as marine mammals and seabirds. However, detailed information on their trophic relationships with Antarctic seals is scarce. The aim of the present study was to examine the cephalopod portion of the diet of a...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/67898 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/67898 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/67898 2023-10-09T21:46:25+02:00 Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula Daneri, Gustavo Adolfo Carlini, A. R. Negri, Agustina Allcock, A. L. Corbalán, A. application/pdf http://hdl.handle.net/11336/67898 eng eng Springer info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-011-1104-0 info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00300-011-1104-0 http://hdl.handle.net/11336/67898 Daneri, Gustavo Adolfo; Carlini, A. R.; Negri, Agustina; Allcock, A. L.; Corbalán, A.; Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula; Springer; Polar Biology; 35; 4; 4-2012; 585-592 0722-4060 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Antarctic Peninsula Cephalopods Diet Leptonychotes Weddell Seals 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/s00300-011-1104-0 2023-09-24T18:46:30Z Cephalopods play a key role in marine environments as food resources for top predators such as marine mammals and seabirds. However, detailed information on their trophic relationships with Antarctic seals is scarce. The aim of the present study was to examine the cephalopod portion of the diet of adult and subadult Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula, through the analysis of scats collected during three consecutive summers (2003, 2004 and 2005). Cephalopods occurred in almost 45% of the 217 samples collected during the whole period of study. A total of 662 beaks (358 upper and 304 lower) were removed from scats containing cephalopod remains (n = 93). Octopods were largely dominant in comparison with teuthoids constituting in numerical abundance over 95% of the cephalopod prey. The octopod Pareledone turqueti was the most frequent and dominant prey species representing, respectively, 57.9 and 71.1% in numbers and biomass of cephalopods consumed. Species belonging to the group of papillated Pareledone were second in importance. The results were compared with information from previous dietary studies of L. weddellii at other localities of Antarctica. Based on the examination of the cephalopod prey taxa identified in this study, it is suggested that during the study period Weddell seal individuals foraged mainly on benthic prey resources close to the coast, in inshore waters where octopods were dominant in comparison with pelagic squid. © 2011 Springer-Verlag. Fil: Daneri, Gustavo Adolfo. 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 Antártico Argentino; Argentina Fil: Negri, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Instituto Antártico Argentino Polar Biology Weddell Seal Weddell Seals CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Antarctic Peninsula Argentino Weddell Argentina Gustavo ENVELOPE(-62.917,-62.917,-64.833,-64.833) Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Polar Biology 35 4 585 592 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Antarctic Peninsula Cephalopods Diet Leptonychotes Weddell Seals https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Antarctic Peninsula Cephalopods Diet Leptonychotes Weddell Seals https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Daneri, Gustavo Adolfo Carlini, A. R. Negri, Agustina Allcock, A. L. Corbalán, A. Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula |
topic_facet |
Antarctic Peninsula Cephalopods Diet Leptonychotes Weddell Seals https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Cephalopods play a key role in marine environments as food resources for top predators such as marine mammals and seabirds. However, detailed information on their trophic relationships with Antarctic seals is scarce. The aim of the present study was to examine the cephalopod portion of the diet of adult and subadult Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula, through the analysis of scats collected during three consecutive summers (2003, 2004 and 2005). Cephalopods occurred in almost 45% of the 217 samples collected during the whole period of study. A total of 662 beaks (358 upper and 304 lower) were removed from scats containing cephalopod remains (n = 93). Octopods were largely dominant in comparison with teuthoids constituting in numerical abundance over 95% of the cephalopod prey. The octopod Pareledone turqueti was the most frequent and dominant prey species representing, respectively, 57.9 and 71.1% in numbers and biomass of cephalopods consumed. Species belonging to the group of papillated Pareledone were second in importance. The results were compared with information from previous dietary studies of L. weddellii at other localities of Antarctica. Based on the examination of the cephalopod prey taxa identified in this study, it is suggested that during the study period Weddell seal individuals foraged mainly on benthic prey resources close to the coast, in inshore waters where octopods were dominant in comparison with pelagic squid. © 2011 Springer-Verlag. Fil: Daneri, Gustavo Adolfo. 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 Antártico Argentino; Argentina Fil: Negri, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo ... |
format |
Article in Journal/Newspaper |
author |
Daneri, Gustavo Adolfo Carlini, A. R. Negri, Agustina Allcock, A. L. Corbalán, A. |
author_facet |
Daneri, Gustavo Adolfo Carlini, A. R. Negri, Agustina Allcock, A. L. Corbalán, A. |
author_sort |
Daneri, Gustavo Adolfo |
title |
Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula |
title_short |
Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula |
title_full |
Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula |
title_fullStr |
Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula |
title_full_unstemmed |
Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula |
title_sort |
predation on cephalopods by weddell seals, leptonychotes weddellii, at hope bay, antarctic peninsula |
publisher |
Springer |
url |
http://hdl.handle.net/11336/67898 |
long_lat |
ENVELOPE(-62.917,-62.917,-64.833,-64.833) ENVELOPE(-57.038,-57.038,-63.403,-63.403) |
geographic |
Antarctic Antarctic Peninsula Argentino Weddell Argentina Gustavo Hope Bay |
geographic_facet |
Antarctic Antarctic Peninsula Argentino Weddell Argentina Gustavo Hope Bay |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Instituto Antártico Argentino Polar Biology Weddell Seal Weddell Seals |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Instituto Antártico Argentino Polar Biology Weddell Seal Weddell Seals |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-011-1104-0 info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00300-011-1104-0 http://hdl.handle.net/11336/67898 Daneri, Gustavo Adolfo; Carlini, A. R.; Negri, Agustina; Allcock, A. L.; Corbalán, A.; Predation on cephalopods by Weddell seals, Leptonychotes weddellii, at Hope Bay, Antarctic Peninsula; Springer; Polar Biology; 35; 4; 4-2012; 585-592 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/s00300-011-1104-0 |
container_title |
Polar Biology |
container_volume |
35 |
container_issue |
4 |
container_start_page |
585 |
op_container_end_page |
592 |
_version_ |
1779322104712265728 |