Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment
Understanding the distribution and foraging ecology of major consumers within pelagic systems, specifically in relation to physical parameters, can be important for the management of bentho-pelagic systems undergoing rapid change associated with global climate change and other anthropogenic disturba...
Published in: | Polar Research |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Co-Action Publishing
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/2263/50258 https://doi.org/10.3402/polar.v33.23808 |
id |
ftunivpretoria:oai:repository.up.ac.za:2263/50258 |
---|---|
record_format |
openpolar |
spelling |
ftunivpretoria:oai:repository.up.ac.za:2263/50258 2023-05-15T14:02:58+02:00 Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment McIntyre, Trevor Bornemann, Horst De Bruyn, P.J. Nico Reisinger, Ryan Rudolf Steinhage, Daniel Marquez, Maria E.I. Bester, Marthan Nieuwoudt Plotz, Joachim 2014 http://hdl.handle.net/2263/50258 https://doi.org/10.3402/polar.v33.23808 en eng Co-Action Publishing http://hdl.handle.net/2263/50258 McIntyre, T, Bornemann, H, De Bruyn, PJN, Reisinger, RR, Steinhage, D, Marquez, MEI, Bester, MN & Plotz, J, 'Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment', Polar Research 2014, 33, http://dx.doi.org/10.3402/polar.v33.23808. 0800-0395 (print) 1751-8369 (online) doi:10.3402/polar.v33.23808 © 2014 T. McIntyre et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/). CC-BY-NC Southern elephant seals Foraging ecology Satellite-relay data loggers King George Island Isla 25 de Mayo At-sea behaviour Article 2014 ftunivpretoria https://doi.org/10.3402/polar.v33.23808 2022-05-31T13:23:42Z Understanding the distribution and foraging ecology of major consumers within pelagic systems, specifically in relation to physical parameters, can be important for the management of bentho-pelagic systems undergoing rapid change associated with global climate change and other anthropogenic disturbances such as fishing (i.e., the Antarctic Peninsula and Scotia Sea). We tracked 11 adult male southern elephant seals (Mirounga leonina), during their five-month post-moult foraging migrations from King George Island (Isla 25 de Mayo), northern Antarctic Peninsula, using tags capable of recording and transmitting behavioural data and in situ temperature and salinity data. Seals foraged mostly within the Weddell Scotia Confluence, while a few foraged along the western Antarctic Peninsula shelf of the Bellingshausen Sea. Mixed model outputs suggest that the at-sea behaviour of seals was associated with a number of environmental parameters, especially seafloor depth, sea-ice concentrations and the temperature structure of the water column. Seals increased dive bottom times and travelled at slower speeds in shallower areas and areas with increased sea-ice concentrations. Changes in dive depth and durations, as well as relative amount of time spent during the bottom phases of dives, were observed in relation to differences in overall temperature gradient, likely as a response to vertical changes in prey distribution associated with temperature stratification in the water column. Our results illustrate the likely complex influences of bathymetry, hydrography and sea ice on the behaviour of male southern elephant seals in a changing environment and highlight the need for regionspecific approaches to studying environmental influences on behaviour. http://www.polarresearch.net/index.php/polar/index hb2015 Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Elephant Seals Isla 25 de Mayo King George Island Mirounga leonina Polar Research Scotia Sea Sea ice Southern Elephant Seals University of Pretoria: UPSpace Antarctic The Antarctic Antarctic Peninsula King George Island Scotia Sea Bellingshausen Sea Weddell 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) isla 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Polar Research 33 1 23808 |
institution |
Open Polar |
collection |
University of Pretoria: UPSpace |
op_collection_id |
ftunivpretoria |
language |
English |
topic |
Southern elephant seals Foraging ecology Satellite-relay data loggers King George Island Isla 25 de Mayo At-sea behaviour |
spellingShingle |
Southern elephant seals Foraging ecology Satellite-relay data loggers King George Island Isla 25 de Mayo At-sea behaviour McIntyre, Trevor Bornemann, Horst De Bruyn, P.J. Nico Reisinger, Ryan Rudolf Steinhage, Daniel Marquez, Maria E.I. Bester, Marthan Nieuwoudt Plotz, Joachim Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment |
topic_facet |
Southern elephant seals Foraging ecology Satellite-relay data loggers King George Island Isla 25 de Mayo At-sea behaviour |
description |
Understanding the distribution and foraging ecology of major consumers within pelagic systems, specifically in relation to physical parameters, can be important for the management of bentho-pelagic systems undergoing rapid change associated with global climate change and other anthropogenic disturbances such as fishing (i.e., the Antarctic Peninsula and Scotia Sea). We tracked 11 adult male southern elephant seals (Mirounga leonina), during their five-month post-moult foraging migrations from King George Island (Isla 25 de Mayo), northern Antarctic Peninsula, using tags capable of recording and transmitting behavioural data and in situ temperature and salinity data. Seals foraged mostly within the Weddell Scotia Confluence, while a few foraged along the western Antarctic Peninsula shelf of the Bellingshausen Sea. Mixed model outputs suggest that the at-sea behaviour of seals was associated with a number of environmental parameters, especially seafloor depth, sea-ice concentrations and the temperature structure of the water column. Seals increased dive bottom times and travelled at slower speeds in shallower areas and areas with increased sea-ice concentrations. Changes in dive depth and durations, as well as relative amount of time spent during the bottom phases of dives, were observed in relation to differences in overall temperature gradient, likely as a response to vertical changes in prey distribution associated with temperature stratification in the water column. Our results illustrate the likely complex influences of bathymetry, hydrography and sea ice on the behaviour of male southern elephant seals in a changing environment and highlight the need for regionspecific approaches to studying environmental influences on behaviour. http://www.polarresearch.net/index.php/polar/index hb2015 |
format |
Article in Journal/Newspaper |
author |
McIntyre, Trevor Bornemann, Horst De Bruyn, P.J. Nico Reisinger, Ryan Rudolf Steinhage, Daniel Marquez, Maria E.I. Bester, Marthan Nieuwoudt Plotz, Joachim |
author_facet |
McIntyre, Trevor Bornemann, Horst De Bruyn, P.J. Nico Reisinger, Ryan Rudolf Steinhage, Daniel Marquez, Maria E.I. Bester, Marthan Nieuwoudt Plotz, Joachim |
author_sort |
McIntyre, Trevor |
title |
Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment |
title_short |
Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment |
title_full |
Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment |
title_fullStr |
Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment |
title_full_unstemmed |
Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment |
title_sort |
environmental influences on the at-sea behaviour of a major consumer, mirounga leonina, in a rapidly changing environment |
publisher |
Co-Action Publishing |
publishDate |
2014 |
url |
http://hdl.handle.net/2263/50258 https://doi.org/10.3402/polar.v33.23808 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-58.000,-58.000,-62.083,-62.083) |
geographic |
Antarctic The Antarctic Antarctic Peninsula King George Island Scotia Sea Bellingshausen Sea Weddell 25 de Mayo isla 25 de Mayo |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula King George Island Scotia Sea Bellingshausen Sea Weddell 25 de Mayo isla 25 de Mayo |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Elephant Seals Isla 25 de Mayo King George Island Mirounga leonina Polar Research Scotia Sea Sea ice Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Elephant Seals Isla 25 de Mayo King George Island Mirounga leonina Polar Research Scotia Sea Sea ice Southern Elephant Seals |
op_relation |
http://hdl.handle.net/2263/50258 McIntyre, T, Bornemann, H, De Bruyn, PJN, Reisinger, RR, Steinhage, D, Marquez, MEI, Bester, MN & Plotz, J, 'Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment', Polar Research 2014, 33, http://dx.doi.org/10.3402/polar.v33.23808. 0800-0395 (print) 1751-8369 (online) doi:10.3402/polar.v33.23808 |
op_rights |
© 2014 T. McIntyre et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/). |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.3402/polar.v33.23808 |
container_title |
Polar Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
23808 |
_version_ |
1766273419228217344 |