Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands
International audience In the Southern Ocean, mesoscale features, such as fronts and eddies, have been shown to have a significant impact in structuring and enhancing primary productivity. They are therefore likely to influence the spatial structure of prey fields and play a key role in the creation...
Published in: | Progress in Oceanography |
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ftccsdartic:oai:HAL:hal-00546929v1 2024-02-11T09:59:00+01:00 Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands Dragon, Anne-Cécile Monestiez, Pascal Bar-Hen, Avner Guinet, Christophe Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) TAAF (Terres Australes et Antarctiques Francaises) 109 2010 https://hal.science/hal-00546929 https://doi.org/10.1016/j.pocean.2010.09.025 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2010.09.025 hal-00546929 https://hal.science/hal-00546929 doi:10.1016/j.pocean.2010.09.025 PRODINRA: 36029 WOS: 000286298700006 ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-00546929 Progress in Oceanography, 2010, 87 (1-4), pp.61-71. ⟨10.1016/j.pocean.2010.09.025⟩ SPATIAL STRUCTURE FORAGING BEHAVIOUR OCEANIC PREDATOR ELEPHANT SEAL DIVING BEHAVIOUR MESOSCALE REMOTE SENSING MIROUNGA LEONINA PREDATEUR MARIN ECOLOGIE MARINE TOURBILLON CYCLONIQUE [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1016/j.pocean.2010.09.025 2024-01-27T23:49:58Z International audience In the Southern Ocean, mesoscale features, such as fronts and eddies, have been shown to have a significant impact in structuring and enhancing primary productivity. They are therefore likely to influence the spatial structure of prey fields and play a key role in the creation of preferred foraging regions for oceanic top-predators. Optimal foraging theory predicts that predators should adjust their movement behaviour in relation to prey density. While crossing areas with sufficient prey density, we expect predators would change their behaviour by, for instance, decreasing their speed and increasing their turning frequency. Diving predators would as well increase the useful part of their dive i.e. increase bottom-time thereby increasing the fraction of time spent capturing prey. Southern elephant seals from the Kerguelen population have several foraging areas: in Antarctic waters, on the Kerguelen Plateau and in the interfrontal zone between the Subtropical and Polar Fronts. This study investigated how the movement and diving behaviour of 22 seals equipped with satellite-relayed data loggers changed in relation to mesoscale structures typical of the interfrontal zone. We studied the links between oceanographic variables including temperature and sea level anomalies, and diving and movement behaviour such as displacement speed, diving duration and bottom-time. Correlation coefficients between each of the time series were calculated and their significance tested with a parametric bootstrap. We focused on oceanographic changes, both temporal and spatial, occurring during behavioural transitions in order to clarify the connections between the behaviour and the marine environment of the animals. We showed that a majority of seals displayed a specific foraging behaviour related to the presence of both cyclonic and anticyclonic eddies. We characterized mesoscale oceanographic zones as either favourable or unfavourable based on the intensity of foraging activity as identified by the behavioural ... Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seals Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Kerguelen Kerguelen Islands Southern Ocean Progress in Oceanography 87 1-4 61 71 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
SPATIAL STRUCTURE FORAGING BEHAVIOUR OCEANIC PREDATOR ELEPHANT SEAL DIVING BEHAVIOUR MESOSCALE REMOTE SENSING MIROUNGA LEONINA PREDATEUR MARIN ECOLOGIE MARINE TOURBILLON CYCLONIQUE [SDE]Environmental Sciences |
spellingShingle |
SPATIAL STRUCTURE FORAGING BEHAVIOUR OCEANIC PREDATOR ELEPHANT SEAL DIVING BEHAVIOUR MESOSCALE REMOTE SENSING MIROUNGA LEONINA PREDATEUR MARIN ECOLOGIE MARINE TOURBILLON CYCLONIQUE [SDE]Environmental Sciences Dragon, Anne-Cécile Monestiez, Pascal Bar-Hen, Avner Guinet, Christophe Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands |
topic_facet |
SPATIAL STRUCTURE FORAGING BEHAVIOUR OCEANIC PREDATOR ELEPHANT SEAL DIVING BEHAVIOUR MESOSCALE REMOTE SENSING MIROUNGA LEONINA PREDATEUR MARIN ECOLOGIE MARINE TOURBILLON CYCLONIQUE [SDE]Environmental Sciences |
description |
International audience In the Southern Ocean, mesoscale features, such as fronts and eddies, have been shown to have a significant impact in structuring and enhancing primary productivity. They are therefore likely to influence the spatial structure of prey fields and play a key role in the creation of preferred foraging regions for oceanic top-predators. Optimal foraging theory predicts that predators should adjust their movement behaviour in relation to prey density. While crossing areas with sufficient prey density, we expect predators would change their behaviour by, for instance, decreasing their speed and increasing their turning frequency. Diving predators would as well increase the useful part of their dive i.e. increase bottom-time thereby increasing the fraction of time spent capturing prey. Southern elephant seals from the Kerguelen population have several foraging areas: in Antarctic waters, on the Kerguelen Plateau and in the interfrontal zone between the Subtropical and Polar Fronts. This study investigated how the movement and diving behaviour of 22 seals equipped with satellite-relayed data loggers changed in relation to mesoscale structures typical of the interfrontal zone. We studied the links between oceanographic variables including temperature and sea level anomalies, and diving and movement behaviour such as displacement speed, diving duration and bottom-time. Correlation coefficients between each of the time series were calculated and their significance tested with a parametric bootstrap. We focused on oceanographic changes, both temporal and spatial, occurring during behavioural transitions in order to clarify the connections between the behaviour and the marine environment of the animals. We showed that a majority of seals displayed a specific foraging behaviour related to the presence of both cyclonic and anticyclonic eddies. We characterized mesoscale oceanographic zones as either favourable or unfavourable based on the intensity of foraging activity as identified by the behavioural ... |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) TAAF (Terres Australes et Antarctiques Francaises) 109 |
format |
Article in Journal/Newspaper |
author |
Dragon, Anne-Cécile Monestiez, Pascal Bar-Hen, Avner Guinet, Christophe |
author_facet |
Dragon, Anne-Cécile Monestiez, Pascal Bar-Hen, Avner Guinet, Christophe |
author_sort |
Dragon, Anne-Cécile |
title |
Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands |
title_short |
Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands |
title_full |
Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands |
title_fullStr |
Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands |
title_full_unstemmed |
Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands |
title_sort |
linking foraging behaviour to physical oceanographic structures: southern elephant seals and mesoscale eddies east of kerguelen islands |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00546929 https://doi.org/10.1016/j.pocean.2010.09.025 |
geographic |
Antarctic Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Antarctic Kerguelen Kerguelen Islands Southern Ocean |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seals Southern Ocean |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seals Southern Ocean |
op_source |
ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-00546929 Progress in Oceanography, 2010, 87 (1-4), pp.61-71. ⟨10.1016/j.pocean.2010.09.025⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2010.09.025 hal-00546929 https://hal.science/hal-00546929 doi:10.1016/j.pocean.2010.09.025 PRODINRA: 36029 WOS: 000286298700006 |
op_doi |
https://doi.org/10.1016/j.pocean.2010.09.025 |
container_title |
Progress in Oceanography |
container_volume |
87 |
container_issue |
1-4 |
container_start_page |
61 |
op_container_end_page |
71 |
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1790594881536655360 |