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Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant

Graeme C. Hays Orcid Logo, Nadine Atchison-Balmond, Giulia Cerritelli, Jacques-Olivier Laloë, Paolo Luschi, Jeanne A. Mortimer, Alex Rattray, Nicole Esteban Orcid Logo

Journal of The Royal Society Interface, Volume: 19, Issue: 190

Swansea University Author: Nicole Esteban Orcid Logo

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DOI (Published version): 10.1098/rsif.2021.0859

Abstract

How animals navigate across the ocean to isolated targets remains perplexing greater than 150 years since this question was considered by Charles Darwin. To help solve this long-standing enigma, we considered the likely resolution of any map sense used in migration, based on the navigational perform...

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Published in: Journal of The Royal Society Interface
ISSN: 1742-5662
Published: The Royal Society 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa60526
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spelling 2022-10-28T09:59:24.6802495 v2 60526 2022-07-18 Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant fb2e760b83b4580e7445092982f1f319 0000-0003-4693-7221 Nicole Esteban Nicole Esteban true false 2022-07-18 SBI How animals navigate across the ocean to isolated targets remains perplexing greater than 150 years since this question was considered by Charles Darwin. To help solve this long-standing enigma, we considered the likely resolution of any map sense used in migration, based on the navigational performance across different scales (tens to thousands of kilometres). We assessed navigational performance using a unique high-resolution Fastloc-GPS tracking dataset for post-breeding hawksbill turtles (Eretmochelys imbricata) migrating relatively short distances to remote, isolated targets on submerged banks in the Indian Ocean. Individuals often followed circuitous paths (mean straightness index = 0.54, range 0.14–0.93, s.d. = 0.23, n = 22), when migrating short distances (mean beeline distance to target = 106 km, range 68.7–178.2 km). For example, one turtle travelled 1306.2 km when the beeline distance to the target was only 176.4 km. When off the beeline to their target, turtles sometimes corrected their course both in the open ocean and when encountering shallow water. Our results provide compelling evidence that hawksbill turtles only have a relatively crude map sense in the open ocean. The existence of widespread foraging and breeding areas on isolated oceanic sites points to target searching in the final stages of migration being common in sea turtles. Journal Article Journal of The Royal Society Interface 19 190 The Royal Society 1742-5662 navigation, route-finding, current drift, BIOT, Diego Garcia 11 5 2022 2022-05-11 10.1098/rsif.2021.0859 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University This work was supported by the Bertarelli Foundation as part ofthe Bertarelli Programme in Marine Science (grant no. BPMS-2017-4). 2022-10-28T09:59:24.6802495 2022-07-18T15:30:40.8576256 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Graeme C. Hays 0000-0002-3314-8189 1 Nadine Atchison-Balmond 2 Giulia Cerritelli 3 Jacques-Olivier Laloë 4 Paolo Luschi 5 Jeanne A. Mortimer 6 Alex Rattray 7 Nicole Esteban 0000-0003-4693-7221 8 60526__24641__f3d3cc71a2b84c5aa844755bf1ebb824.pdf 60526.pdf 2022-07-19T14:05:32.5173691 Output 845176 application/pdf Version of Record true © 2022 The Authors. Released under the terms of the Creative Commons Attribution License. true eng http://creativecommons.org/licenses/by/4.0/
title Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
spellingShingle Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
Nicole Esteban
title_short Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
title_full Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
title_fullStr Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
title_full_unstemmed Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
title_sort Travel routes to remote ocean targets reveal the map sense resolution for a marine migrant
author_id_str_mv fb2e760b83b4580e7445092982f1f319
author_id_fullname_str_mv fb2e760b83b4580e7445092982f1f319_***_Nicole Esteban
author Nicole Esteban
author2 Graeme C. Hays
Nadine Atchison-Balmond
Giulia Cerritelli
Jacques-Olivier Laloë
Paolo Luschi
Jeanne A. Mortimer
Alex Rattray
Nicole Esteban
format Journal article
container_title Journal of The Royal Society Interface
container_volume 19
container_issue 190
publishDate 2022
institution Swansea University
issn 1742-5662
doi_str_mv 10.1098/rsif.2021.0859
publisher The Royal Society
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description How animals navigate across the ocean to isolated targets remains perplexing greater than 150 years since this question was considered by Charles Darwin. To help solve this long-standing enigma, we considered the likely resolution of any map sense used in migration, based on the navigational performance across different scales (tens to thousands of kilometres). We assessed navigational performance using a unique high-resolution Fastloc-GPS tracking dataset for post-breeding hawksbill turtles (Eretmochelys imbricata) migrating relatively short distances to remote, isolated targets on submerged banks in the Indian Ocean. Individuals often followed circuitous paths (mean straightness index = 0.54, range 0.14–0.93, s.d. = 0.23, n = 22), when migrating short distances (mean beeline distance to target = 106 km, range 68.7–178.2 km). For example, one turtle travelled 1306.2 km when the beeline distance to the target was only 176.4 km. When off the beeline to their target, turtles sometimes corrected their course both in the open ocean and when encountering shallow water. Our results provide compelling evidence that hawksbill turtles only have a relatively crude map sense in the open ocean. The existence of widespread foraging and breeding areas on isolated oceanic sites points to target searching in the final stages of migration being common in sea turtles.
published_date 2022-05-11T04:18:42Z
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