Optimal orientation in flows: providing a benchmark for animal movement strategies
Animal movements in air and water can be strongly affected by experienced flow. While various flow-orientation strategies have been proposed and observed, their performance in variable flow conditions remains unclear. We apply control theory to establish a benchmark for time-minimizing (optimal) ori...
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crroyalsociety:10.1098/rsif.2014.0588 2024-09-15T18:07:23+00:00 Optimal orientation in flows: providing a benchmark for animal movement strategies McLaren, James D. Shamoun-Baranes, Judy Dokter, Adriaan M. Klaassen, Raymond H. G. Bouten, Willem 2014 http://dx.doi.org/10.1098/rsif.2014.0588 https://royalsocietypublishing.org/doi/pdf/10.1098/rsif.2014.0588 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsif.2014.0588 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Journal of The Royal Society Interface volume 11, issue 99, page 20140588 ISSN 1742-5689 1742-5662 journal-article 2014 crroyalsociety https://doi.org/10.1098/rsif.2014.0588 2024-08-26T04:20:59Z Animal movements in air and water can be strongly affected by experienced flow. While various flow-orientation strategies have been proposed and observed, their performance in variable flow conditions remains unclear. We apply control theory to establish a benchmark for time-minimizing (optimal) orientation. We then define optimal orientation for movement in steady flow patterns and, using dynamic wind data, for short-distance mass movements of thrushes ( Turdus sp.) and 6000 km non-stop migratory flights by great snipes, Gallinago media. Relative to the optimal benchmark, we assess the efficiency (travel speed) and reliability (success rate) of three generic orientation strategies: full compensation for lateral drift, vector orientation (single-heading movement) and goal orientation (continually heading towards the goal). Optimal orientation is characterized by detours to regions of high flow support, especially when flow speeds approach and exceed the animal's self-propelled speed. In strong predictable flow (short distance thrush flights), vector orientation adjusted to flow on departure is nearly optimal, whereas for unpredictable flow (inter-continental snipe flights), only goal orientation was near-optimally reliable and efficient. Optimal orientation provides a benchmark for assessing efficiency of responses to complex flow conditions, thereby offering insight into adaptive flow-orientation across taxa in the light of flow strength, predictability and navigation capacity. Article in Journal/Newspaper Gallinago media The Royal Society Journal of The Royal Society Interface 11 99 20140588 |
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The Royal Society |
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crroyalsociety |
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English |
description |
Animal movements in air and water can be strongly affected by experienced flow. While various flow-orientation strategies have been proposed and observed, their performance in variable flow conditions remains unclear. We apply control theory to establish a benchmark for time-minimizing (optimal) orientation. We then define optimal orientation for movement in steady flow patterns and, using dynamic wind data, for short-distance mass movements of thrushes ( Turdus sp.) and 6000 km non-stop migratory flights by great snipes, Gallinago media. Relative to the optimal benchmark, we assess the efficiency (travel speed) and reliability (success rate) of three generic orientation strategies: full compensation for lateral drift, vector orientation (single-heading movement) and goal orientation (continually heading towards the goal). Optimal orientation is characterized by detours to regions of high flow support, especially when flow speeds approach and exceed the animal's self-propelled speed. In strong predictable flow (short distance thrush flights), vector orientation adjusted to flow on departure is nearly optimal, whereas for unpredictable flow (inter-continental snipe flights), only goal orientation was near-optimally reliable and efficient. Optimal orientation provides a benchmark for assessing efficiency of responses to complex flow conditions, thereby offering insight into adaptive flow-orientation across taxa in the light of flow strength, predictability and navigation capacity. |
format |
Article in Journal/Newspaper |
author |
McLaren, James D. Shamoun-Baranes, Judy Dokter, Adriaan M. Klaassen, Raymond H. G. Bouten, Willem |
spellingShingle |
McLaren, James D. Shamoun-Baranes, Judy Dokter, Adriaan M. Klaassen, Raymond H. G. Bouten, Willem Optimal orientation in flows: providing a benchmark for animal movement strategies |
author_facet |
McLaren, James D. Shamoun-Baranes, Judy Dokter, Adriaan M. Klaassen, Raymond H. G. Bouten, Willem |
author_sort |
McLaren, James D. |
title |
Optimal orientation in flows: providing a benchmark for animal movement strategies |
title_short |
Optimal orientation in flows: providing a benchmark for animal movement strategies |
title_full |
Optimal orientation in flows: providing a benchmark for animal movement strategies |
title_fullStr |
Optimal orientation in flows: providing a benchmark for animal movement strategies |
title_full_unstemmed |
Optimal orientation in flows: providing a benchmark for animal movement strategies |
title_sort |
optimal orientation in flows: providing a benchmark for animal movement strategies |
publisher |
The Royal Society |
publishDate |
2014 |
url |
http://dx.doi.org/10.1098/rsif.2014.0588 https://royalsocietypublishing.org/doi/pdf/10.1098/rsif.2014.0588 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsif.2014.0588 |
genre |
Gallinago media |
genre_facet |
Gallinago media |
op_source |
Journal of The Royal Society Interface volume 11, issue 99, page 20140588 ISSN 1742-5689 1742-5662 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsif.2014.0588 |
container_title |
Journal of The Royal Society Interface |
container_volume |
11 |
container_issue |
99 |
container_start_page |
20140588 |
_version_ |
1810444771866443776 |