Dive efficiency versus depth in foraging emperor penguins
International audience Dive duration generally decreases with dive depth in air-breathing vertebrates. In most penguin species, this occurs due to increasing transit (descent and ascent) durations. However, in U-shaped dives, this is also because the duration of the bottom phase of the dive increase...
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Online Access: | https://hal.science/hal-00473165 https://doi.org/10.3354/ab00213 |
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ftunivnantes:oai:HAL:hal-00473165v1 2023-05-15T13:33:18+02:00 Dive efficiency versus depth in foraging emperor penguins Zimmer, Ilka P. Wilson, Rory Beaulieu, Michaël Ropert‐coudert, Yan Kato, Akiko Ancel, André Plötz, Joachim Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Institute of Environmental Sustainability Swansea University Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) National Insitute of Polar Research National Institute of Polar Research Tokyo (NiPR) 2010 https://hal.science/hal-00473165 https://doi.org/10.3354/ab00213 en eng HAL CCSD Inter-Research info:eu-repo/semantics/altIdentifier/doi/10.3354/ab00213 hal-00473165 https://hal.science/hal-00473165 doi:10.3354/ab00213 ISSN: 1864-7782 EISSN: 1864-7790 Aquatic Biology https://hal.science/hal-00473165 Aquatic Biology, 2010, 8, pp.269-277. ⟨10.3354/ab00213⟩ Emperor penguins Foraging depth Bottom dive duration Dive efficiency [SDE]Environmental Sciences [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/article Journal articles 2010 ftunivnantes https://doi.org/10.3354/ab00213 2023-03-08T00:29:17Z International audience Dive duration generally decreases with dive depth in air-breathing vertebrates. In most penguin species, this occurs due to increasing transit (descent and ascent) durations. However, in U-shaped dives, this is also because the duration of the bottom phase of the dive increases with increasing depth. We considered the time-based efficiency with which birds can use different diving depths by using depth recorders on 9 foraging emperor penguins Aptenodytes forsteri, studied during the early and late chick-rearing period in Adélie Land, Antarctica. Dive and post-dive duration positively correlated with diving depth, but particularly long recovery durations were apparent for dives longer than 456 s. This inflection point (i.e. 456 s) corresponded to a theorized maximum rate of gain of prey per dive cycle. By using the number of undulations in the bottom phase of the dive as a proxy for prey capture success, we conclude that the most lucrative dive depths for the birds studied were between 50 and 225 m. Since these depths were also those most often visited, we think that foraging emperor penguins focus on depths where profitability is highest. Article in Journal/Newspaper Antarc* Antarctica Aptenodytes forsteri Emperor penguins Université de Nantes: HAL-UNIV-NANTES Aquatic Biology 8 269 277 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Emperor penguins Foraging depth Bottom dive duration Dive efficiency [SDE]Environmental Sciences [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
spellingShingle |
Emperor penguins Foraging depth Bottom dive duration Dive efficiency [SDE]Environmental Sciences [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] Zimmer, Ilka P. Wilson, Rory Beaulieu, Michaël Ropert‐coudert, Yan Kato, Akiko Ancel, André Plötz, Joachim Dive efficiency versus depth in foraging emperor penguins |
topic_facet |
Emperor penguins Foraging depth Bottom dive duration Dive efficiency [SDE]Environmental Sciences [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
description |
International audience Dive duration generally decreases with dive depth in air-breathing vertebrates. In most penguin species, this occurs due to increasing transit (descent and ascent) durations. However, in U-shaped dives, this is also because the duration of the bottom phase of the dive increases with increasing depth. We considered the time-based efficiency with which birds can use different diving depths by using depth recorders on 9 foraging emperor penguins Aptenodytes forsteri, studied during the early and late chick-rearing period in Adélie Land, Antarctica. Dive and post-dive duration positively correlated with diving depth, but particularly long recovery durations were apparent for dives longer than 456 s. This inflection point (i.e. 456 s) corresponded to a theorized maximum rate of gain of prey per dive cycle. By using the number of undulations in the bottom phase of the dive as a proxy for prey capture success, we conclude that the most lucrative dive depths for the birds studied were between 50 and 225 m. Since these depths were also those most often visited, we think that foraging emperor penguins focus on depths where profitability is highest. |
author2 |
Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Institute of Environmental Sustainability Swansea University Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) National Insitute of Polar Research National Institute of Polar Research Tokyo (NiPR) |
format |
Article in Journal/Newspaper |
author |
Zimmer, Ilka P. Wilson, Rory Beaulieu, Michaël Ropert‐coudert, Yan Kato, Akiko Ancel, André Plötz, Joachim |
author_facet |
Zimmer, Ilka P. Wilson, Rory Beaulieu, Michaël Ropert‐coudert, Yan Kato, Akiko Ancel, André Plötz, Joachim |
author_sort |
Zimmer, Ilka |
title |
Dive efficiency versus depth in foraging emperor penguins |
title_short |
Dive efficiency versus depth in foraging emperor penguins |
title_full |
Dive efficiency versus depth in foraging emperor penguins |
title_fullStr |
Dive efficiency versus depth in foraging emperor penguins |
title_full_unstemmed |
Dive efficiency versus depth in foraging emperor penguins |
title_sort |
dive efficiency versus depth in foraging emperor penguins |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00473165 https://doi.org/10.3354/ab00213 |
genre |
Antarc* Antarctica Aptenodytes forsteri Emperor penguins |
genre_facet |
Antarc* Antarctica Aptenodytes forsteri Emperor penguins |
op_source |
ISSN: 1864-7782 EISSN: 1864-7790 Aquatic Biology https://hal.science/hal-00473165 Aquatic Biology, 2010, 8, pp.269-277. ⟨10.3354/ab00213⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/ab00213 hal-00473165 https://hal.science/hal-00473165 doi:10.3354/ab00213 |
op_doi |
https://doi.org/10.3354/ab00213 |
container_title |
Aquatic Biology |
container_volume |
8 |
container_start_page |
269 |
op_container_end_page |
277 |
_version_ |
1766041170598690816 |