Predictability and chaos in bird vigilant behavior
While foraging, many animals alternate between feeding and scanning. Spectral analyses of sequences of successive scan and inter-scan durations suggest the existence of a significant non-random, periodic component in the scanning dynamics of some birds. Evidence for cyclic vigilance remains controve...
Published in: | Animal Behaviour |
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1996
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Online Access: | https://pure.iiasa.ac.at/id/eprint/4694/ https://doi.org/10.1006/anbe.1996.0190 |
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ftiiasalaxenburg:oai:pure.iiasa.ac.at:4694 2023-05-15T15:48:32+02:00 Predictability and chaos in bird vigilant behavior Ferriere, R. Cazelles, B. Cezilly, F. Desportes, J.P. 1996-09 https://pure.iiasa.ac.at/id/eprint/4694/ https://doi.org/10.1006/anbe.1996.0190 unknown Elsevier Ferriere, R. <https://pure.iiasa.ac.at/view/iiasa/1248.html>, Cazelles, B., Cezilly, F., & Desportes, J.P. (1996). Predictability and chaos in bird vigilant behavior. Animal Behaviour 52 (3) 457-472. 10.1006/anbe.1996.0190 <https://doi.org/10.1006/anbe.1996.0190>. doi:10.1006/anbe.1996.0190 Article PeerReviewed 1996 ftiiasalaxenburg https://doi.org/10.1006/anbe.1996.0190 2023-04-07T14:45:41Z While foraging, many animals alternate between feeding and scanning. Spectral analyses of sequences of successive scan and inter-scan durations suggest the existence of a significant non-random, periodic component in the scanning dynamics of some birds. Evidence for cyclic vigilance remains controversial, however. Here data obtained from a purple sandpiper, Calidris maritima, two Barbary doves, Streptopelia risoria, and two choughs, Pyrrhocorax pyrrhocorax were re-analysed by making use of statistical methods from non-linear dynamics. Predictability portraits obtained by subjecting the data to non-linear forecasting support the view that the vigilant behaviour of the two choughs is periodic with superimposed noise. By contrast, the hypothesis of periodic scanning is rejected for the sandpiper and doves, as well as that of pure randomness. Instead, the vigilant behaviour of the sandpiper and doves bears the signature of deterministic chaos: high, short-term, decaying predictability of scan and inter-scan durations. The sequential structure of the data sets makes them well suited for reliable computation of the rate at which predictability declines; results support the conclusion of chaotic patterns. Finally, a mathematical model is developed to investigate some possible functional benefits of periodicity and chaos in vigilant behaviour, compared with random scanning, in terms of the optimization of corporate vigilance of birds foraging in flocks. If individual vigilance is chaotic, then even loose coordination, based on predictions only one foraging bout ahead, can dramatically reduce individual predictability and enhance the level of group surveillance. Article in Journal/Newspaper Calidris maritima Purple Sandpiper IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) Animal Behaviour 52 3 457 472 |
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IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) |
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ftiiasalaxenburg |
language |
unknown |
description |
While foraging, many animals alternate between feeding and scanning. Spectral analyses of sequences of successive scan and inter-scan durations suggest the existence of a significant non-random, periodic component in the scanning dynamics of some birds. Evidence for cyclic vigilance remains controversial, however. Here data obtained from a purple sandpiper, Calidris maritima, two Barbary doves, Streptopelia risoria, and two choughs, Pyrrhocorax pyrrhocorax were re-analysed by making use of statistical methods from non-linear dynamics. Predictability portraits obtained by subjecting the data to non-linear forecasting support the view that the vigilant behaviour of the two choughs is periodic with superimposed noise. By contrast, the hypothesis of periodic scanning is rejected for the sandpiper and doves, as well as that of pure randomness. Instead, the vigilant behaviour of the sandpiper and doves bears the signature of deterministic chaos: high, short-term, decaying predictability of scan and inter-scan durations. The sequential structure of the data sets makes them well suited for reliable computation of the rate at which predictability declines; results support the conclusion of chaotic patterns. Finally, a mathematical model is developed to investigate some possible functional benefits of periodicity and chaos in vigilant behaviour, compared with random scanning, in terms of the optimization of corporate vigilance of birds foraging in flocks. If individual vigilance is chaotic, then even loose coordination, based on predictions only one foraging bout ahead, can dramatically reduce individual predictability and enhance the level of group surveillance. |
format |
Article in Journal/Newspaper |
author |
Ferriere, R. Cazelles, B. Cezilly, F. Desportes, J.P. |
spellingShingle |
Ferriere, R. Cazelles, B. Cezilly, F. Desportes, J.P. Predictability and chaos in bird vigilant behavior |
author_facet |
Ferriere, R. Cazelles, B. Cezilly, F. Desportes, J.P. |
author_sort |
Ferriere, R. |
title |
Predictability and chaos in bird vigilant behavior |
title_short |
Predictability and chaos in bird vigilant behavior |
title_full |
Predictability and chaos in bird vigilant behavior |
title_fullStr |
Predictability and chaos in bird vigilant behavior |
title_full_unstemmed |
Predictability and chaos in bird vigilant behavior |
title_sort |
predictability and chaos in bird vigilant behavior |
publisher |
Elsevier |
publishDate |
1996 |
url |
https://pure.iiasa.ac.at/id/eprint/4694/ https://doi.org/10.1006/anbe.1996.0190 |
genre |
Calidris maritima Purple Sandpiper |
genre_facet |
Calidris maritima Purple Sandpiper |
op_relation |
Ferriere, R. <https://pure.iiasa.ac.at/view/iiasa/1248.html>, Cazelles, B., Cezilly, F., & Desportes, J.P. (1996). Predictability and chaos in bird vigilant behavior. Animal Behaviour 52 (3) 457-472. 10.1006/anbe.1996.0190 <https://doi.org/10.1006/anbe.1996.0190>. doi:10.1006/anbe.1996.0190 |
op_doi |
https://doi.org/10.1006/anbe.1996.0190 |
container_title |
Animal Behaviour |
container_volume |
52 |
container_issue |
3 |
container_start_page |
457 |
op_container_end_page |
472 |
_version_ |
1766383493714018304 |