Foraging success of biological Levy flights recorded in situ.
International audience It is an open question how animals find food in dynamic natural environments where they possess little or no knowledge of where resources are located. Foraging theory predicts that in environments with sparsely distributed target resources, where forager knowledge about resour...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | https://doi.org/10.1073/pnas.1121201109 https://hal.archives-ouvertes.fr/hal-00700869 |
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fttriple:oai:gotriple.eu:10670/1.r7alz0 2023-05-15T16:00:56+02:00 Foraging success of biological Levy flights recorded in situ. Humphries, Nicolas E Weimerskirch, Henri Queiroz, Nuno Southall, Emily J Sims, David W The Laboratory (Marine Biological Association of the United Kingdom) Marine Biological Association of the United Kingdom (MBA) School of Marine Science and Engineering Plymouth University Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Universidade do Porto National Oceanography Centre Southampton (NOC) University of Southampton Centre for Biological Sciences (University of Southampton) 2012-05-08 https://doi.org/10.1073/pnas.1121201109 https://hal.archives-ouvertes.fr/hal-00700869 en eng HAL CCSD National Academy of Sciences hal-00700869 doi:10.1073/pnas.1121201109 PUBMED: 22529349 10670/1.r7alz0 https://hal.archives-ouvertes.fr/hal-00700869 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2012, 109 (19), pp.7169-74. ⟨10.1073/pnas.1121201109⟩ envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.1073/pnas.1121201109 2023-01-22T17:38:50Z International audience It is an open question how animals find food in dynamic natural environments where they possess little or no knowledge of where resources are located. Foraging theory predicts that in environments with sparsely distributed target resources, where forager knowledge about resources' locations is incomplete, Lévy flight movements optimize the success of random searches. However, the putative success of Lévy foraging has been demonstrated only in model simulations. Here, we use high-temporal-resolution Global Positioning System (GPS) tracking of wandering (Diomedea exulans) and black-browed albatrosses (Thalassarche melanophrys) with simultaneous recording of prey captures, to show that both species exhibit Lévy and Brownian movement patterns. We find that total prey masses captured by wandering albatrosses during Lévy movements exceed daily energy requirements by nearly fourfold, and approached yields by Brownian movements in other habitats. These results, together with our reanalysis of previously published albatross data, overturn the notion that albatrosses do not exhibit Lévy patterns during foraging, and demonstrate that Lévy flights of predators in dynamic natural environments present a beneficial alternative strategy to simple, spatially intensive behaviors. Our findings add support to the possibility that biological Lévy flight may have naturally evolved as a search strategy in response to sparse resources and scant information. Article in Journal/Newspaper Diomedea exulans Unknown Levy ENVELOPE(-66.567,-66.567,-66.320,-66.320) Proceedings of the National Academy of Sciences 109 19 7169 7174 |
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English |
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envir geo Humphries, Nicolas E Weimerskirch, Henri Queiroz, Nuno Southall, Emily J Sims, David W Foraging success of biological Levy flights recorded in situ. |
topic_facet |
envir geo |
description |
International audience It is an open question how animals find food in dynamic natural environments where they possess little or no knowledge of where resources are located. Foraging theory predicts that in environments with sparsely distributed target resources, where forager knowledge about resources' locations is incomplete, Lévy flight movements optimize the success of random searches. However, the putative success of Lévy foraging has been demonstrated only in model simulations. Here, we use high-temporal-resolution Global Positioning System (GPS) tracking of wandering (Diomedea exulans) and black-browed albatrosses (Thalassarche melanophrys) with simultaneous recording of prey captures, to show that both species exhibit Lévy and Brownian movement patterns. We find that total prey masses captured by wandering albatrosses during Lévy movements exceed daily energy requirements by nearly fourfold, and approached yields by Brownian movements in other habitats. These results, together with our reanalysis of previously published albatross data, overturn the notion that albatrosses do not exhibit Lévy patterns during foraging, and demonstrate that Lévy flights of predators in dynamic natural environments present a beneficial alternative strategy to simple, spatially intensive behaviors. Our findings add support to the possibility that biological Lévy flight may have naturally evolved as a search strategy in response to sparse resources and scant information. |
author2 |
The Laboratory (Marine Biological Association of the United Kingdom) Marine Biological Association of the United Kingdom (MBA) School of Marine Science and Engineering Plymouth University Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Universidade do Porto National Oceanography Centre Southampton (NOC) University of Southampton Centre for Biological Sciences (University of Southampton) |
format |
Article in Journal/Newspaper |
author |
Humphries, Nicolas E Weimerskirch, Henri Queiroz, Nuno Southall, Emily J Sims, David W |
author_facet |
Humphries, Nicolas E Weimerskirch, Henri Queiroz, Nuno Southall, Emily J Sims, David W |
author_sort |
Humphries, Nicolas E |
title |
Foraging success of biological Levy flights recorded in situ. |
title_short |
Foraging success of biological Levy flights recorded in situ. |
title_full |
Foraging success of biological Levy flights recorded in situ. |
title_fullStr |
Foraging success of biological Levy flights recorded in situ. |
title_full_unstemmed |
Foraging success of biological Levy flights recorded in situ. |
title_sort |
foraging success of biological levy flights recorded in situ. |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://doi.org/10.1073/pnas.1121201109 https://hal.archives-ouvertes.fr/hal-00700869 |
long_lat |
ENVELOPE(-66.567,-66.567,-66.320,-66.320) |
geographic |
Levy |
geographic_facet |
Levy |
genre |
Diomedea exulans |
genre_facet |
Diomedea exulans |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2012, 109 (19), pp.7169-74. ⟨10.1073/pnas.1121201109⟩ |
op_relation |
hal-00700869 doi:10.1073/pnas.1121201109 PUBMED: 22529349 10670/1.r7alz0 https://hal.archives-ouvertes.fr/hal-00700869 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1073/pnas.1121201109 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
109 |
container_issue |
19 |
container_start_page |
7169 |
op_container_end_page |
7174 |
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1766396938792468480 |