The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem
International audience Weddell seals, Leptonychotes weddellii, areimportant apex predators in the food web of the Antarcticmarine ecosystem. However, detailed information on theirtrophic relationships with cephalopods is scarce. Moreover,cephalopods play a key role in the marine environment, butknow...
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ftunivnantes:oai:HAL:hal-01292500v1 2023-05-15T13:44:28+02:00 The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem Negri, A. Daneri, G. A. Ceia, F. Vieira, R. Cherel, Yves Coria, N. R. Corbalan, A. Xavier, J. C. Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2016 https://hal.archives-ouvertes.fr/hal-01292500 https://doi.org/10.1007/s00300-015-1794-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-015-1794-9 hal-01292500 https://hal.archives-ouvertes.fr/hal-01292500 doi:10.1007/s00300-015-1794-9 ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.archives-ouvertes.fr/hal-01292500 Polar Biology, 2016, 39, pp.561-564. ⟨10.1007/s00300-015-1794-9⟩ Antarctica Leptonychotes weddellii Diet Cephalopods Stable isotopes [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2016 ftunivnantes https://doi.org/10.1007/s00300-015-1794-9 2023-01-04T00:07:19Z International audience Weddell seals, Leptonychotes weddellii, areimportant apex predators in the food web of the Antarcticmarine ecosystem. However, detailed information on theirtrophic relationships with cephalopods is scarce. Moreover,cephalopods play a key role in the marine environment, butknowledge of their feeding habits is limited by lack of data.Here, we have combined the use of this seal as a biologicalsampler together with measurements of the stable isotopicsignature of the beaks of their cephalopod prey. Thus, theaims of the present study were: (1) to examine in detail thecephalopod portion of the diet of Weddell seals by meansof scat analysis and (2) to assess the habitat use and trophiclevel of the different cephalopod prey taxa identified. FromJanuary to February 2009, a total of 48 faecal droppingswere collected at Hope Bay, Antarctic Peninsula. Cephalopodswere mainly represented by beaks (n = 83) whichwere identified to the lowest possible taxonomic level.Furthermore, subsamples of beaks were separated for furtherisotopic analysis. Relative abundance of stable isotopesof carbon (d13C) and nitrogen (d15N) was determined by continuous-flow isotope-ratio mass spectrometry.Cephalopods were represented uniquely by octopods of thesubfamily Eledoninae. Pareledone turqueti was the dominantprey species followed by the papillated Pareledonespecies group and Adelieledone polymorpha. We concludethat Weddell seals preyed primarily on benthic preyresources. Furthermore, the relatively similar d13C andd15N values in beaks of the three octopod prey taxa suggestthat these share the same type of habitat and occupy similartrophic level positions. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Polar Biology Weddell Seal Weddell Seals Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Antarctic Peninsula Weddell Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Polar Biology 39 3 561 564 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctica Leptonychotes weddellii Diet Cephalopods Stable isotopes [SDE]Environmental Sciences |
spellingShingle |
Antarctica Leptonychotes weddellii Diet Cephalopods Stable isotopes [SDE]Environmental Sciences Negri, A. Daneri, G. A. Ceia, F. Vieira, R. Cherel, Yves Coria, N. R. Corbalan, A. Xavier, J. C. The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem |
topic_facet |
Antarctica Leptonychotes weddellii Diet Cephalopods Stable isotopes [SDE]Environmental Sciences |
description |
International audience Weddell seals, Leptonychotes weddellii, areimportant apex predators in the food web of the Antarcticmarine ecosystem. However, detailed information on theirtrophic relationships with cephalopods is scarce. Moreover,cephalopods play a key role in the marine environment, butknowledge of their feeding habits is limited by lack of data.Here, we have combined the use of this seal as a biologicalsampler together with measurements of the stable isotopicsignature of the beaks of their cephalopod prey. Thus, theaims of the present study were: (1) to examine in detail thecephalopod portion of the diet of Weddell seals by meansof scat analysis and (2) to assess the habitat use and trophiclevel of the different cephalopod prey taxa identified. FromJanuary to February 2009, a total of 48 faecal droppingswere collected at Hope Bay, Antarctic Peninsula. Cephalopodswere mainly represented by beaks (n = 83) whichwere identified to the lowest possible taxonomic level.Furthermore, subsamples of beaks were separated for furtherisotopic analysis. Relative abundance of stable isotopesof carbon (d13C) and nitrogen (d15N) was determined by continuous-flow isotope-ratio mass spectrometry.Cephalopods were represented uniquely by octopods of thesubfamily Eledoninae. Pareledone turqueti was the dominantprey species followed by the papillated Pareledonespecies group and Adelieledone polymorpha. We concludethat Weddell seals preyed primarily on benthic preyresources. Furthermore, the relatively similar d13C andd15N values in beaks of the three octopod prey taxa suggestthat these share the same type of habitat and occupy similartrophic level positions. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Negri, A. Daneri, G. A. Ceia, F. Vieira, R. Cherel, Yves Coria, N. R. Corbalan, A. Xavier, J. C. |
author_facet |
Negri, A. Daneri, G. A. Ceia, F. Vieira, R. Cherel, Yves Coria, N. R. Corbalan, A. Xavier, J. C. |
author_sort |
Negri, A. |
title |
The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem |
title_short |
The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem |
title_full |
The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem |
title_fullStr |
The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem |
title_full_unstemmed |
The cephalopod prey of the Weddell seal, Leptonychotes weddellii, a biological sampler of the Antarctic marine ecosystem |
title_sort |
cephalopod prey of the weddell seal, leptonychotes weddellii, a biological sampler of the antarctic marine ecosystem |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01292500 https://doi.org/10.1007/s00300-015-1794-9 |
long_lat |
ENVELOPE(-57.038,-57.038,-63.403,-63.403) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Hope Bay |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Hope Bay |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Polar Biology Weddell Seal Weddell Seals |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Polar Biology Weddell Seal Weddell Seals |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.archives-ouvertes.fr/hal-01292500 Polar Biology, 2016, 39, pp.561-564. ⟨10.1007/s00300-015-1794-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-015-1794-9 hal-01292500 https://hal.archives-ouvertes.fr/hal-01292500 doi:10.1007/s00300-015-1794-9 |
op_doi |
https://doi.org/10.1007/s00300-015-1794-9 |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
3 |
container_start_page |
561 |
op_container_end_page |
564 |
_version_ |
1766202036103151616 |