Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird.
Foraging animals are expected to adjust their path according to the hierarchical spatial distribution of food resources and environmental factors. Studying such behaviour requires methods that allow for the detection of changes in pathways' characteristics across scales, i.e. a definition of sc...
Published in: | Proceedings of the Royal Society of London. Series B: Biological Sciences |
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691358 http://www.ncbi.nlm.nih.gov/pubmed/12816652 https://doi.org/10.1098/rspb.2003.2350 |
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ftpubmed:oai:pubmedcentral.nih.gov:1691358 2023-05-15T16:00:56+02:00 Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. Fritz, Hervé Said, Sonia Weimerskirch, Henri 2003-06-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691358 http://www.ncbi.nlm.nih.gov/pubmed/12816652 https://doi.org/10.1098/rspb.2003.2350 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691358 http://www.ncbi.nlm.nih.gov/pubmed/12816652 http://dx.doi.org/10.1098/rspb.2003.2350 Research Article Text 2003 ftpubmed https://doi.org/10.1098/rspb.2003.2350 2013-08-31T12:35:14Z Foraging animals are expected to adjust their path according to the hierarchical spatial distribution of food resources and environmental factors. Studying such behaviour requires methods that allow for the detection of changes in pathways' characteristics across scales, i.e. a definition of scale boundaries and techniques to continuously monitor the precise movement of the animal over a sufficiently long period. We used a recently developed application of fractals, the changes in fractal dimension within a path and applied it to foraging trips over scales ranging across five orders of magnitude (10 m to 1000 km), using locations of wandering albatrosses (Diomedea exulans) recorded at 1 s intervals with a miniaturized global positioning system. Remarkably, all animals consistently showed the same pattern: the use of three scale-dependent nested domains where they adjust tortuosity to different environmental and behavioural constraints. At a small scale (ca. 100 m) they use a zigzag movement as they continuously adjust for optimal use of wind; at a medium scale (1-10 km), the movement shows changes in tortuosity consistent with food-searching behaviour; and at a large scale (greater than 10 km) the movement corresponds to commuting between patches and is probably influenced by large-scale weather systems. Our results demonstrate the possibility of identifying the hierarchical spatial scales at which long-ranging animals adjust their foraging behaviour, even in featureless environments such as oceans, and hence how to relate their movement patterns to environmental factors using an objective mathematical approach. Text Diomedea exulans PubMed Central (PMC) Proceedings of the Royal Society of London. Series B: Biological Sciences 270 1520 1143 1148 |
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Research Article |
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Research Article Fritz, Hervé Said, Sonia Weimerskirch, Henri Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
topic_facet |
Research Article |
description |
Foraging animals are expected to adjust their path according to the hierarchical spatial distribution of food resources and environmental factors. Studying such behaviour requires methods that allow for the detection of changes in pathways' characteristics across scales, i.e. a definition of scale boundaries and techniques to continuously monitor the precise movement of the animal over a sufficiently long period. We used a recently developed application of fractals, the changes in fractal dimension within a path and applied it to foraging trips over scales ranging across five orders of magnitude (10 m to 1000 km), using locations of wandering albatrosses (Diomedea exulans) recorded at 1 s intervals with a miniaturized global positioning system. Remarkably, all animals consistently showed the same pattern: the use of three scale-dependent nested domains where they adjust tortuosity to different environmental and behavioural constraints. At a small scale (ca. 100 m) they use a zigzag movement as they continuously adjust for optimal use of wind; at a medium scale (1-10 km), the movement shows changes in tortuosity consistent with food-searching behaviour; and at a large scale (greater than 10 km) the movement corresponds to commuting between patches and is probably influenced by large-scale weather systems. Our results demonstrate the possibility of identifying the hierarchical spatial scales at which long-ranging animals adjust their foraging behaviour, even in featureless environments such as oceans, and hence how to relate their movement patterns to environmental factors using an objective mathematical approach. |
format |
Text |
author |
Fritz, Hervé Said, Sonia Weimerskirch, Henri |
author_facet |
Fritz, Hervé Said, Sonia Weimerskirch, Henri |
author_sort |
Fritz, Hervé |
title |
Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
title_short |
Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
title_full |
Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
title_fullStr |
Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
title_full_unstemmed |
Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
title_sort |
scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. |
publishDate |
2003 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691358 http://www.ncbi.nlm.nih.gov/pubmed/12816652 https://doi.org/10.1098/rspb.2003.2350 |
genre |
Diomedea exulans |
genre_facet |
Diomedea exulans |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691358 http://www.ncbi.nlm.nih.gov/pubmed/12816652 http://dx.doi.org/10.1098/rspb.2003.2350 |
op_doi |
https://doi.org/10.1098/rspb.2003.2350 |
container_title |
Proceedings of the Royal Society of London. Series B: Biological Sciences |
container_volume |
270 |
container_issue |
1520 |
container_start_page |
1143 |
op_container_end_page |
1148 |
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