Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method
International audience 1. Identifying the spatial scales at which top marine predators forage is important for understanding oceanic ecosystems. Several methods quantify how individuals concentrate their search effort along a given path. Among these, First-Passage Time (FPT) analysis is particularly...
Published in: | Journal of Animal Ecology |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00319769 https://doi.org/10.1111/j.1365-2656.2008.01407.x |
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ftccsdartic:oai:HAL:hal-00319769v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
foraging ecology spatial scale marine mammals bio-logging diving behaviour [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
foraging ecology spatial scale marine mammals bio-logging diving behaviour [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes Bailleul, Frédéric Pinaud, David Hindell, Mark A. Charrassin, Jean-Benoît Guinet, Christophe Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method |
topic_facet |
foraging ecology spatial scale marine mammals bio-logging diving behaviour [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience 1. Identifying the spatial scales at which top marine predators forage is important for understanding oceanic ecosystems. Several methods quantify how individuals concentrate their search effort along a given path. Among these, First-Passage Time (FPT) analysis is particularly useful to identify transitions in movement patterns (e.g. between searching and feeding). This method has mainly been applied to terrestrial animals or flying seabirds that have little or no vertical component to their foraging, so we examined the differences between classic FPT and a modification of this approach using the time spent at the bottom of a dive for characterizing the foraging activity of a diving predator: the southern elephant seal. 2. Satellite relayed data loggers were deployed on 20 individuals during three successive summers at the Kerguelen Islands, providing a total of 72 978 dives from eight juvenile males and nine adult females. 3. Spatial scales identified using the time spent at the bottom of a dive ( w = 68·2 ± 42·1 km) were smaller than those obtained by the classic FPT analysis ( w = 104·7 ± 67·3 km). Moreover, foraging areas identified using the new approach clearly overlapped areas where individuals increased their body condition, indicating that it accurately reflected the foraging activity of the seals. 4. These results suggest that incorporating the vertical dimension into FPT provides a different result to the surface path alone. Close to the Antarctic continent, within the pack-ice, sinuosity of the path could be explained by a high sea-ice concentration (restricting elephant seal movements), and was not necessarily related to foraging activity. 5. Our approach distinguished between actual foraging activity and changes in behaviour induced by the physical environment like sea ice, and could be applied to other diving predators. Inclusion of diving parameters appears to be essential to identify the spatial scale of foraging areas of diving animals. |
author2 |
Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Antartic Wildlife Research Unit School of Zoology, University of Tasmania Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) 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)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Bailleul, Frédéric Pinaud, David Hindell, Mark A. Charrassin, Jean-Benoît Guinet, Christophe |
author_facet |
Bailleul, Frédéric Pinaud, David Hindell, Mark A. Charrassin, Jean-Benoît Guinet, Christophe |
author_sort |
Bailleul, Frédéric |
title |
Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method |
title_short |
Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method |
title_full |
Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method |
title_fullStr |
Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method |
title_full_unstemmed |
Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method |
title_sort |
assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the first passage time method |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00319769 https://doi.org/10.1111/j.1365-2656.2008.01407.x |
geographic |
Antarctic The Antarctic Kerguelen Kerguelen Islands |
geographic_facet |
Antarctic The Antarctic Kerguelen Kerguelen Islands |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Sea ice Southern Elephant Seal Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Sea ice Southern Elephant Seal Southern Elephant Seals |
op_source |
ISSN: 0021-8790 EISSN: 1365-2656 Journal of Animal Ecology https://hal.archives-ouvertes.fr/hal-00319769 Journal of Animal Ecology, Wiley, 2008, 77, pp.948-957. ⟨10.1111/j.1365-2656.2008.01407.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2656.2008.01407.x info:eu-repo/semantics/altIdentifier/pmid/18513336 hal-00319769 https://hal.archives-ouvertes.fr/hal-00319769 doi:10.1111/j.1365-2656.2008.01407.x PUBMED: 18513336 |
op_doi |
https://doi.org/10.1111/j.1365-2656.2008.01407.x |
container_title |
Journal of Animal Ecology |
container_volume |
77 |
container_issue |
5 |
container_start_page |
948 |
op_container_end_page |
957 |
_version_ |
1766265530710228992 |
spelling |
ftccsdartic:oai:HAL:hal-00319769v1 2023-05-15T13:57:43+02:00 Assessment of scale-dependent foraging behaviour in southern elephant seals incorporating the vertical dimension: a development of the First Passage Time method Bailleul, Frédéric Pinaud, David Hindell, Mark A. Charrassin, Jean-Benoît Guinet, Christophe Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Antartic Wildlife Research Unit School of Zoology, University of Tasmania Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) 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)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2008-09-09 https://hal.archives-ouvertes.fr/hal-00319769 https://doi.org/10.1111/j.1365-2656.2008.01407.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2656.2008.01407.x info:eu-repo/semantics/altIdentifier/pmid/18513336 hal-00319769 https://hal.archives-ouvertes.fr/hal-00319769 doi:10.1111/j.1365-2656.2008.01407.x PUBMED: 18513336 ISSN: 0021-8790 EISSN: 1365-2656 Journal of Animal Ecology https://hal.archives-ouvertes.fr/hal-00319769 Journal of Animal Ecology, Wiley, 2008, 77, pp.948-957. ⟨10.1111/j.1365-2656.2008.01407.x⟩ foraging ecology spatial scale marine mammals bio-logging diving behaviour [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1111/j.1365-2656.2008.01407.x 2021-12-05T03:54:53Z International audience 1. Identifying the spatial scales at which top marine predators forage is important for understanding oceanic ecosystems. Several methods quantify how individuals concentrate their search effort along a given path. Among these, First-Passage Time (FPT) analysis is particularly useful to identify transitions in movement patterns (e.g. between searching and feeding). This method has mainly been applied to terrestrial animals or flying seabirds that have little or no vertical component to their foraging, so we examined the differences between classic FPT and a modification of this approach using the time spent at the bottom of a dive for characterizing the foraging activity of a diving predator: the southern elephant seal. 2. Satellite relayed data loggers were deployed on 20 individuals during three successive summers at the Kerguelen Islands, providing a total of 72 978 dives from eight juvenile males and nine adult females. 3. Spatial scales identified using the time spent at the bottom of a dive ( w = 68·2 ± 42·1 km) were smaller than those obtained by the classic FPT analysis ( w = 104·7 ± 67·3 km). Moreover, foraging areas identified using the new approach clearly overlapped areas where individuals increased their body condition, indicating that it accurately reflected the foraging activity of the seals. 4. These results suggest that incorporating the vertical dimension into FPT provides a different result to the surface path alone. Close to the Antarctic continent, within the pack-ice, sinuosity of the path could be explained by a high sea-ice concentration (restricting elephant seal movements), and was not necessarily related to foraging activity. 5. Our approach distinguished between actual foraging activity and changes in behaviour induced by the physical environment like sea ice, and could be applied to other diving predators. Inclusion of diving parameters appears to be essential to identify the spatial scale of foraging areas of diving animals. Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Sea ice Southern Elephant Seal Southern Elephant Seals Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Kerguelen Kerguelen Islands Journal of Animal Ecology 77 5 948 957 |