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Why do Argos satellite tags stop relaying data?

Graeme C. Hays, Jacques‐Olivier Laloë, Alex Rattray, Nicole Esteban Orcid Logo

Ecology and Evolution, Volume: 11, Issue: 11, Pages: 7093 - 7101

Swansea University Author: Nicole Esteban Orcid Logo

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DOI (Published version): 10.1002/ece3.7558

Abstract

1. Satellite tracking of animals is very widespread across a range of marine, fresh-water and terrestrial taxa. Despite the high cost of tags and the advantages of long deployments, the reasons why tracking data from tags stops being received are rarely considered, but possibilities include shedding...

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Published in: Ecology and Evolution
ISSN: 2045-7758 2045-7758
Published: Wiley 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57107
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spelling 2021-06-30T15:42:29.0789207 v2 57107 2021-06-11 Why do Argos satellite tags stop relaying data? fb2e760b83b4580e7445092982f1f319 0000-0003-4693-7221 Nicole Esteban Nicole Esteban true false 2021-06-11 SBI 1. Satellite tracking of animals is very widespread across a range of marine, fresh-water and terrestrial taxa. Despite the high cost of tags and the advantages of long deployments, the reasons why tracking data from tags stops being received are rarely considered, but possibilities include shedding of the tag, damage to the tag (e.g. the aerial), biofouling, battery exhaustion or animal mortality. 2. We show how information relayed via satellite tags can be used to assess why tracking data stops being received. As a case study to illustrate general approaches that are broadly applicable across taxa, we examined data from Fastloc-GPS Argos tags deployed between 2012 and 2019 on 78 sea turtles of two species, green turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata). 3. Tags transmitted for a mean of 267 days (range 26 - 687 days, median = 251 days, SD = 113 days). In 68 of 78 (87%) of cases, battery failure was implicated as the reason why tracking data stopped being received. Some biofouling of the salt-water switches, which synchronise transmissions with surfacing, was evident in a few tags but never appeared to be the reason that data reception ceased. 4. Objectively assessing why tags fail will direct improvements to tag design, set-up and deployment and across studies regardless of the study taxa. Assessing why satellite tags stop transmitting will also inform on the fate of tagged animals, e.g. whether they are alive or dead at the end of the study, which may allow improved estimates of survival rates. Journal Article Ecology and Evolution 11 11 7093 7101 Wiley 2045-7758 2045-7758 animal movement, Argos, Fastloc-GPS, home range, migration, mortality, satellite tracking,telemetry 1 6 2021 2021-06-01 10.1002/ece3.7558 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University Not Required This work was supported by the Bertarelli Foundation as part of the Bertarelli Programme in Marine Science BPMS-2017-4 2021-06-30T15:42:29.0789207 2021-06-11T15:17:02.4172918 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Graeme C. Hays 1 Jacques‐Olivier Laloë 2 Alex Rattray 3 Nicole Esteban 0000-0003-4693-7221 4 57107__20137__794dd2d9cecb4ef6ad29811bdbef8961.pdf Hays_etal_2021_Why_tags_fail_Ecol_Evolution.pdf 2021-06-11T15:24:12.7595118 Output 892000 application/pdf Version of Record true © 2021 The Authors. This is an open access article under the terms of the Creative Commons Attribution License true eng http://creativecommons.org/licenses/by/4.0/
title Why do Argos satellite tags stop relaying data?
spellingShingle Why do Argos satellite tags stop relaying data?
Nicole Esteban
title_short Why do Argos satellite tags stop relaying data?
title_full Why do Argos satellite tags stop relaying data?
title_fullStr Why do Argos satellite tags stop relaying data?
title_full_unstemmed Why do Argos satellite tags stop relaying data?
title_sort Why do Argos satellite tags stop relaying data?
author_id_str_mv fb2e760b83b4580e7445092982f1f319
author_id_fullname_str_mv fb2e760b83b4580e7445092982f1f319_***_Nicole Esteban
author Nicole Esteban
author2 Graeme C. Hays
Jacques‐Olivier Laloë
Alex Rattray
Nicole Esteban
format Journal article
container_title Ecology and Evolution
container_volume 11
container_issue 11
container_start_page 7093
publishDate 2021
institution Swansea University
issn 2045-7758
2045-7758
doi_str_mv 10.1002/ece3.7558
publisher Wiley
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 1. Satellite tracking of animals is very widespread across a range of marine, fresh-water and terrestrial taxa. Despite the high cost of tags and the advantages of long deployments, the reasons why tracking data from tags stops being received are rarely considered, but possibilities include shedding of the tag, damage to the tag (e.g. the aerial), biofouling, battery exhaustion or animal mortality. 2. We show how information relayed via satellite tags can be used to assess why tracking data stops being received. As a case study to illustrate general approaches that are broadly applicable across taxa, we examined data from Fastloc-GPS Argos tags deployed between 2012 and 2019 on 78 sea turtles of two species, green turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata). 3. Tags transmitted for a mean of 267 days (range 26 - 687 days, median = 251 days, SD = 113 days). In 68 of 78 (87%) of cases, battery failure was implicated as the reason why tracking data stopped being received. Some biofouling of the salt-water switches, which synchronise transmissions with surfacing, was evident in a few tags but never appeared to be the reason that data reception ceased. 4. Objectively assessing why tags fail will direct improvements to tag design, set-up and deployment and across studies regardless of the study taxa. Assessing why satellite tags stop transmitting will also inform on the fate of tagged animals, e.g. whether they are alive or dead at the end of the study, which may allow improved estimates of survival rates.
published_date 2021-06-01T04:12:36Z
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score 11.037581

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