How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals
International audience RATIONALE: In ecological studies of wildlife movements and foraging, bio-logging and isotopic data are routinely collected and increasingly analyzed in tandem. Such analyses have two shortcomings: (1) small sample size linked with the number of telemetric tags that can be depl...
Published in: | Rapid Communications in Mass Spectrometry |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.science/hal-00741769 https://doi.org/10.1002/rcm.6389 |
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ftceafr:oai:HAL:hal-00741769v1 |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Authier, Matthieu Dragon, Anne-Cécile Cherel, Yves Guinet, Christophe How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience RATIONALE: In ecological studies of wildlife movements and foraging, bio-logging and isotopic data are routinely collected and increasingly analyzed in tandem. Such analyses have two shortcomings: (1) small sample size linked with the number of telemetric tags that can be deployed, and (2) the observational nature of isotopic gradients. Wildlife ecologists are thus put in a statistical conundrum known as the small n, large p problem. METHODS: Using shrinkage regression, which directly addresses the issue of accurately estimating effects from sparse data, we studied what counts as a biologically meaningful isotopic difference (a prerequisite to delineate isoscapes) in the southern elephant seal (Mirounga leonina), a large and elusive marine predator. RESULTS: Seals foraging in Antarctic waters had a lower carbon isotopic value (by 2%) than seals foraging either in the interfrontal zone or on the Kerguelen Plateau. The latter two foraging strategies were indistinguishable on the sole basis of d 13 C values with our data. CONCLUSIONS: Shrinkage regression is a conservative statistical technique that has wide applicability in isotopic ecology to help separate robust biological signals from noise |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Authier, Matthieu Dragon, Anne-Cécile Cherel, Yves Guinet, Christophe |
author_facet |
Authier, Matthieu Dragon, Anne-Cécile Cherel, Yves Guinet, Christophe |
author_sort |
Authier, Matthieu |
title |
How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
title_short |
How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
title_full |
How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
title_fullStr |
How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
title_full_unstemmed |
How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
title_sort |
how large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00741769 https://doi.org/10.1002/rcm.6389 |
geographic |
Antarctic Kerguelen |
geographic_facet |
Antarctic Kerguelen |
genre |
Antarc* Antarctic Elephant Seal Mirounga leonina Southern Elephant Seal |
genre_facet |
Antarc* Antarctic Elephant Seal Mirounga leonina Southern Elephant Seal |
op_source |
ISSN: 0951-4198 EISSN: 1097-0231 Rapid Communications in Mass Spectrometry https://hal.science/hal-00741769 Rapid Communications in Mass Spectrometry, 2012, 26, pp.2657-2664. ⟨10.1002/rcm.6389⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/rcm.6389 hal-00741769 https://hal.science/hal-00741769 doi:10.1002/rcm.6389 |
op_doi |
https://doi.org/10.1002/rcm.6389 |
container_title |
Rapid Communications in Mass Spectrometry |
container_volume |
26 |
container_issue |
23 |
container_start_page |
2657 |
op_container_end_page |
2664 |
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1809824187932475392 |
spelling |
ftceafr:oai:HAL:hal-00741769v1 2024-09-09T19:09:52+00:00 How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals Authier, Matthieu Dragon, Anne-Cécile Cherel, Yves Guinet, Christophe Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2012 https://hal.science/hal-00741769 https://doi.org/10.1002/rcm.6389 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/rcm.6389 hal-00741769 https://hal.science/hal-00741769 doi:10.1002/rcm.6389 ISSN: 0951-4198 EISSN: 1097-0231 Rapid Communications in Mass Spectrometry https://hal.science/hal-00741769 Rapid Communications in Mass Spectrometry, 2012, 26, pp.2657-2664. ⟨10.1002/rcm.6389⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2012 ftceafr https://doi.org/10.1002/rcm.6389 2024-08-06T03:57:40Z International audience RATIONALE: In ecological studies of wildlife movements and foraging, bio-logging and isotopic data are routinely collected and increasingly analyzed in tandem. Such analyses have two shortcomings: (1) small sample size linked with the number of telemetric tags that can be deployed, and (2) the observational nature of isotopic gradients. Wildlife ecologists are thus put in a statistical conundrum known as the small n, large p problem. METHODS: Using shrinkage regression, which directly addresses the issue of accurately estimating effects from sparse data, we studied what counts as a biologically meaningful isotopic difference (a prerequisite to delineate isoscapes) in the southern elephant seal (Mirounga leonina), a large and elusive marine predator. RESULTS: Seals foraging in Antarctic waters had a lower carbon isotopic value (by 2%) than seals foraging either in the interfrontal zone or on the Kerguelen Plateau. The latter two foraging strategies were indistinguishable on the sole basis of d 13 C values with our data. CONCLUSIONS: Shrinkage regression is a conservative statistical technique that has wide applicability in isotopic ecology to help separate robust biological signals from noise Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Mirounga leonina Southern Elephant Seal HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Antarctic Kerguelen Rapid Communications in Mass Spectrometry 26 23 2657 2664 |