Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus
International audience How predators search for prey is a cornerstone question in behavioural ecology, which has yet to be investigated for animals foraging in 3D airspace. Do insectivorous birds such as swifts (Apodidae), swallows and martins (Hirundinidae) use similar strategies to those performed...
Published in: | Animal Behaviour |
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Main Authors: | , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 https://doi.org/10.1016/j.anbehav.2017.11.026 |
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ftccsdartic:oai:HAL:hal-01711103v1 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
3D optical tracking aerial predation aero-ecology flight behaviour foraging behaviour movement ecology [SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences [SDV.NEU.PC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Psychology and behavior [SCCO.NEUR]Cognitive science/Neuroscience [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV]Life Sciences [q-bio] |
spellingShingle |
3D optical tracking aerial predation aero-ecology flight behaviour foraging behaviour movement ecology [SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences [SDV.NEU.PC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Psychology and behavior [SCCO.NEUR]Cognitive science/Neuroscience [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV]Life Sciences [q-bio] De Margerie, Emmanuel Pichot, Cécile Benhamou, Simon Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus |
topic_facet |
3D optical tracking aerial predation aero-ecology flight behaviour foraging behaviour movement ecology [SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences [SDV.NEU.PC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Psychology and behavior [SCCO.NEUR]Cognitive science/Neuroscience [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV]Life Sciences [q-bio] |
description |
International audience How predators search for prey is a cornerstone question in behavioural ecology, which has yet to be investigated for animals foraging in 3D airspace. Do insectivorous birds such as swifts (Apodidae), swallows and martins (Hirundinidae) use similar strategies to those performed by terrestrial predators in 2D, or do they rely on different spatial search strategies because of some properties of the aerial open space? We addressed this question in the common swift, one of the most aerial birds, using a novel 3D optical tracking method. The analysis of fine-scale flight tracks revealed how birds distribute their presence in 3D space while foraging near their breeding colony. Common swifts concentrated the time spent per volume unit by adopting a tortuous path, and, to a much lesser extent, by decreasing their movement speed. By independently observing the birds' posture on tracking images, we were able to identify the occurrence of putative prey captures along flight tracks. We show that swifts' presence was concentrated mainly in the vicinity of prey captures, unveiling a volume-concentrated search (VCS) strategy in this aerial insectivore. This is an extension in 3D of the area-concentrated search classically described in terrestrial 2D space. VCS can (but does not necessarily) take place in thermal updrafts, where small insects can be concentrated in patches. In contrast to terrestrial and aquatic predators that can easily slow down or stop their movement in profitable places, a different speed–cost relationship underlying aerial movement prevents swifts from stopping in prey patches and explains why these birds rely mainly on movement tortuosity to perform intensive search. Our study thus shows how some physical properties of the environment can modulate the way an animal concentrates its search in profitable places. |
author2 |
Ethologie animale et humaine (EthoS) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD France-Sud ) |
format |
Article in Journal/Newspaper |
author |
De Margerie, Emmanuel Pichot, Cécile Benhamou, Simon |
author_facet |
De Margerie, Emmanuel Pichot, Cécile Benhamou, Simon |
author_sort |
De Margerie, Emmanuel |
title |
Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus |
title_short |
Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus |
title_full |
Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus |
title_fullStr |
Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus |
title_full_unstemmed |
Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus |
title_sort |
volume-concentrated searching by an aerial insectivore, the common swift, apus apus |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 https://doi.org/10.1016/j.anbehav.2017.11.026 |
genre |
Apus apus |
genre_facet |
Apus apus |
op_source |
ISSN: 0003-3472 EISSN: 1095-8282 Animal Behaviour https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 Animal Behaviour, Elsevier Masson, 2018, 136, pp.159 - 172. ⟨10.1016/j.anbehav.2017.11.026⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.anbehav.2017.11.026 hal-01711103 https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 doi:10.1016/j.anbehav.2017.11.026 |
op_doi |
https://doi.org/10.1016/j.anbehav.2017.11.026 |
container_title |
Animal Behaviour |
container_volume |
136 |
container_start_page |
159 |
op_container_end_page |
172 |
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1766289165826129920 |
spelling |
ftccsdartic:oai:HAL:hal-01711103v1 2023-05-15T14:17:18+02:00 Volume-concentrated searching by an aerial insectivore, the common swift, Apus apus De Margerie, Emmanuel Pichot, Cécile Benhamou, Simon Ethologie animale et humaine (EthoS) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD France-Sud ) 2018-02 https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 https://doi.org/10.1016/j.anbehav.2017.11.026 en eng HAL CCSD Elsevier Masson info:eu-repo/semantics/altIdentifier/doi/10.1016/j.anbehav.2017.11.026 hal-01711103 https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 doi:10.1016/j.anbehav.2017.11.026 ISSN: 0003-3472 EISSN: 1095-8282 Animal Behaviour https://hal-univ-rennes1.archives-ouvertes.fr/hal-01711103 Animal Behaviour, Elsevier Masson, 2018, 136, pp.159 - 172. ⟨10.1016/j.anbehav.2017.11.026⟩ 3D optical tracking aerial predation aero-ecology flight behaviour foraging behaviour movement ecology [SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences [SDV.NEU.PC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Psychology and behavior [SCCO.NEUR]Cognitive science/Neuroscience [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.1016/j.anbehav.2017.11.026 2021-11-21T02:09:32Z International audience How predators search for prey is a cornerstone question in behavioural ecology, which has yet to be investigated for animals foraging in 3D airspace. Do insectivorous birds such as swifts (Apodidae), swallows and martins (Hirundinidae) use similar strategies to those performed by terrestrial predators in 2D, or do they rely on different spatial search strategies because of some properties of the aerial open space? We addressed this question in the common swift, one of the most aerial birds, using a novel 3D optical tracking method. The analysis of fine-scale flight tracks revealed how birds distribute their presence in 3D space while foraging near their breeding colony. Common swifts concentrated the time spent per volume unit by adopting a tortuous path, and, to a much lesser extent, by decreasing their movement speed. By independently observing the birds' posture on tracking images, we were able to identify the occurrence of putative prey captures along flight tracks. We show that swifts' presence was concentrated mainly in the vicinity of prey captures, unveiling a volume-concentrated search (VCS) strategy in this aerial insectivore. This is an extension in 3D of the area-concentrated search classically described in terrestrial 2D space. VCS can (but does not necessarily) take place in thermal updrafts, where small insects can be concentrated in patches. In contrast to terrestrial and aquatic predators that can easily slow down or stop their movement in profitable places, a different speed–cost relationship underlying aerial movement prevents swifts from stopping in prey patches and explains why these birds rely mainly on movement tortuosity to perform intensive search. Our study thus shows how some physical properties of the environment can modulate the way an animal concentrates its search in profitable places. Article in Journal/Newspaper Apus apus Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Animal Behaviour 136 159 172 |