The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea
DATA AVAILABILITY : All primary dive and haul-out data are publicly available and can be found at https://doi.pangaea.de/10.1594/PANGAEA. Ross seals (Ommatophoca rossii) travel away from the pack ice and spend most of their year foraging pelagically. Here, we augment the few existing records of Ross...
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Cambridge University Press
2023
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Online Access: | http://hdl.handle.net/2263/93347 https://doi.org/10.1017/S0954102022000438 |
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ftunivpretoria:oai:repository.up.ac.za:2263/93347 2023-12-17T10:21:28+01:00 The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea Wege, Mia Bornemann, Horst Bester, Marthan Nieuwoudt 2023-02 application/pdf http://hdl.handle.net/2263/93347 https://doi.org/10.1017/S0954102022000438 en eng Cambridge University Press Wege, M., Bornemann, H., & Bester, M. (2023). The nightlife of a Ross seal: Diving and haul-out behaviour from the eastern Weddell Sea. Antarctic Science, 35(1), 31-42. doi:10.1017/S0954102022000438. 0954-1020 (print) 1365-2079 (online) doi:10.1017/S0954102022000438 http://hdl.handle.net/2263/93347 © University of Pretoria, 2023. Published by Cambridge University Press on behalf of Antarctic Science Ltd. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/). Antarctica Biologging Breeding season Diurnal behaviour Queen Maud Land Southern Ocean SDG-14: Life below water Ross seal (Ommatophoca rossii) Article 2023 ftunivpretoria https://doi.org/10.1017/S0954102022000438 2023-11-21T01:30:23Z DATA AVAILABILITY : All primary dive and haul-out data are publicly available and can be found at https://doi.pangaea.de/10.1594/PANGAEA. Ross seals (Ommatophoca rossii) travel away from the pack ice and spend most of their year foraging pelagically. Here, we augment the few existing records of Ross seal diving and haul-out behaviour, providing novel insights into how these are influenced diurnally and seasonally. We used biologging devices that recorded the dive behaviour (n = 5) and/or haul-out behaviour (n = 9) of Ross seals in the eastern Weddell Sea (2016–2019). Ross seals mostly dived between 100 and 200 m deep, often > 300 m, and for 5–12 min in duration, often > 20 min. During March–July, when Ross seals forage pelagically, diving metrics varied diurnally. The seals dived deeper during twilight and shallowest at night, while the number of dives and diving duration did not follow a clear diurnal pattern. Consequently, diving effort was highest during the night. Ross seals preferentially hauled out in the middle of the day during September, October, February and December, but not during the rest of the year. Three females that entered the pack ice during breeding season were hauled out continuously for 5–7 days, punctuated by water entries for 1–3 h during and/or after such continuous haul-outs over the breeding season. This behaviour might suggest that Ross seals alternate between capital and facultative income breeding. The South African National Antarctic Programme (SANAP), Department of Science and Technology (DST), through the National Research Foundation (NRF). https://www.cambridge.org/core/journals/antarctic-science Mammal Research Institute Zoology and Entomology SDG-14:Life below water Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Queen Maud Land Ross Seal South African National Antarctic Programme Southern Ocean Weddell Sea University of Pretoria: UPSpace Antarctic Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Southern Ocean Weddell Weddell Sea Antarctic Science 35 1 31 42 |
institution |
Open Polar |
collection |
University of Pretoria: UPSpace |
op_collection_id |
ftunivpretoria |
language |
English |
topic |
Antarctica Biologging Breeding season Diurnal behaviour Queen Maud Land Southern Ocean SDG-14: Life below water Ross seal (Ommatophoca rossii) |
spellingShingle |
Antarctica Biologging Breeding season Diurnal behaviour Queen Maud Land Southern Ocean SDG-14: Life below water Ross seal (Ommatophoca rossii) Wege, Mia Bornemann, Horst Bester, Marthan Nieuwoudt The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea |
topic_facet |
Antarctica Biologging Breeding season Diurnal behaviour Queen Maud Land Southern Ocean SDG-14: Life below water Ross seal (Ommatophoca rossii) |
description |
DATA AVAILABILITY : All primary dive and haul-out data are publicly available and can be found at https://doi.pangaea.de/10.1594/PANGAEA. Ross seals (Ommatophoca rossii) travel away from the pack ice and spend most of their year foraging pelagically. Here, we augment the few existing records of Ross seal diving and haul-out behaviour, providing novel insights into how these are influenced diurnally and seasonally. We used biologging devices that recorded the dive behaviour (n = 5) and/or haul-out behaviour (n = 9) of Ross seals in the eastern Weddell Sea (2016–2019). Ross seals mostly dived between 100 and 200 m deep, often > 300 m, and for 5–12 min in duration, often > 20 min. During March–July, when Ross seals forage pelagically, diving metrics varied diurnally. The seals dived deeper during twilight and shallowest at night, while the number of dives and diving duration did not follow a clear diurnal pattern. Consequently, diving effort was highest during the night. Ross seals preferentially hauled out in the middle of the day during September, October, February and December, but not during the rest of the year. Three females that entered the pack ice during breeding season were hauled out continuously for 5–7 days, punctuated by water entries for 1–3 h during and/or after such continuous haul-outs over the breeding season. This behaviour might suggest that Ross seals alternate between capital and facultative income breeding. The South African National Antarctic Programme (SANAP), Department of Science and Technology (DST), through the National Research Foundation (NRF). https://www.cambridge.org/core/journals/antarctic-science Mammal Research Institute Zoology and Entomology SDG-14:Life below water |
format |
Article in Journal/Newspaper |
author |
Wege, Mia Bornemann, Horst Bester, Marthan Nieuwoudt |
author_facet |
Wege, Mia Bornemann, Horst Bester, Marthan Nieuwoudt |
author_sort |
Wege, Mia |
title |
The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea |
title_short |
The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea |
title_full |
The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea |
title_fullStr |
The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea |
title_full_unstemmed |
The nightlife of a Ross seal : diving and haul-out behaviour from the eastern Weddell Sea |
title_sort |
nightlife of a ross seal : diving and haul-out behaviour from the eastern weddell sea |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
http://hdl.handle.net/2263/93347 https://doi.org/10.1017/S0954102022000438 |
long_lat |
ENVELOPE(12.000,12.000,-72.500,-72.500) |
geographic |
Antarctic Queen Maud Land Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Queen Maud Land Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Science Antarctica Queen Maud Land Ross Seal South African National Antarctic Programme Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Queen Maud Land Ross Seal South African National Antarctic Programme Southern Ocean Weddell Sea |
op_relation |
Wege, M., Bornemann, H., & Bester, M. (2023). The nightlife of a Ross seal: Diving and haul-out behaviour from the eastern Weddell Sea. Antarctic Science, 35(1), 31-42. doi:10.1017/S0954102022000438. 0954-1020 (print) 1365-2079 (online) doi:10.1017/S0954102022000438 http://hdl.handle.net/2263/93347 |
op_rights |
© University of Pretoria, 2023. Published by Cambridge University Press on behalf of Antarctic Science Ltd. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/). |
op_doi |
https://doi.org/10.1017/S0954102022000438 |
container_title |
Antarctic Science |
container_volume |
35 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
42 |
_version_ |
1785534996380909568 |