Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic
How baleen whales locate prey and how environmental change may influence whale foraging success are not well understood. Baleen whale foraging habitat has largely been described at a population level, yet population responses to change are the result of individual strategies across multiple scales....
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2018
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Online Access: | https://hdl.handle.net/20.500.11937/70144 https://doi.org/10.1071/MF17288 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/70144 2023-06-11T04:05:31+02:00 Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic Owen, K. Jenner, K. Jenner, M. McCauley, Robert Andrews, R. 2018 restricted https://hdl.handle.net/20.500.11937/70144 https://doi.org/10.1071/MF17288 unknown CSIRO Publishing http://hdl.handle.net/20.500.11937/70144 doi:10.1071/MF17288 Journal Article 2018 ftcurtin https://doi.org/20.500.11937/7014410.1071/MF17288 2023-05-30T19:53:56Z How baleen whales locate prey and how environmental change may influence whale foraging success are not well understood. Baleen whale foraging habitat has largely been described at a population level, yet population responses to change are the result of individual strategies across multiple scales. This study aimed to determine how the foraging behaviour of individual whales varied relative to environmental conditions along their movement path. Biotelemetry devices provided information on humpback whale (Megaptera novaeangliae) movement at two spatial scales in East Antarctica, and a mixed modelling approach was used at a medium scale (tens of kilometres) to determine which environmental factors correlated with a change in foraging behaviour. Water temperature was linked to a change in foraging behaviour at both spatial scales. At the medium scale, warmer water was associated with the resident state, commonly assumed to represent periods of foraging behaviour. However, fine-scale analyses suggested that cooler water was associated with a higher feeding rate. Variation in whale foraging behaviour with changes in water temperature adds support to the hypothesis that whales may be able to track environmental conditions to find prey. Future research should investigate this pattern further, given the predicted rise in water temperatures under climate-change scenarios. Article in Journal/Newspaper Antarc* Antarctic Antarctica baleen whale baleen whales East Antarctica Humpback Whale Megaptera novaeangliae Curtin University: espace Antarctic East Antarctica The Antarctic Marine and Freshwater Research 70 1 19 |
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How baleen whales locate prey and how environmental change may influence whale foraging success are not well understood. Baleen whale foraging habitat has largely been described at a population level, yet population responses to change are the result of individual strategies across multiple scales. This study aimed to determine how the foraging behaviour of individual whales varied relative to environmental conditions along their movement path. Biotelemetry devices provided information on humpback whale (Megaptera novaeangliae) movement at two spatial scales in East Antarctica, and a mixed modelling approach was used at a medium scale (tens of kilometres) to determine which environmental factors correlated with a change in foraging behaviour. Water temperature was linked to a change in foraging behaviour at both spatial scales. At the medium scale, warmer water was associated with the resident state, commonly assumed to represent periods of foraging behaviour. However, fine-scale analyses suggested that cooler water was associated with a higher feeding rate. Variation in whale foraging behaviour with changes in water temperature adds support to the hypothesis that whales may be able to track environmental conditions to find prey. Future research should investigate this pattern further, given the predicted rise in water temperatures under climate-change scenarios. |
format |
Article in Journal/Newspaper |
author |
Owen, K. Jenner, K. Jenner, M. McCauley, Robert Andrews, R. |
spellingShingle |
Owen, K. Jenner, K. Jenner, M. McCauley, Robert Andrews, R. Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic |
author_facet |
Owen, K. Jenner, K. Jenner, M. McCauley, Robert Andrews, R. |
author_sort |
Owen, K. |
title |
Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic |
title_short |
Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic |
title_full |
Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic |
title_fullStr |
Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic |
title_full_unstemmed |
Water temperature correlates with baleen whale foraging behaviour at multiple scales in the Antarctic |
title_sort |
water temperature correlates with baleen whale foraging behaviour at multiple scales in the antarctic |
publisher |
CSIRO Publishing |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11937/70144 https://doi.org/10.1071/MF17288 |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica baleen whale baleen whales East Antarctica Humpback Whale Megaptera novaeangliae |
genre_facet |
Antarc* Antarctic Antarctica baleen whale baleen whales East Antarctica Humpback Whale Megaptera novaeangliae |
op_relation |
http://hdl.handle.net/20.500.11937/70144 doi:10.1071/MF17288 |
op_doi |
https://doi.org/20.500.11937/7014410.1071/MF17288 |
container_title |
Marine and Freshwater Research |
container_volume |
70 |
container_issue |
1 |
container_start_page |
19 |
_version_ |
1768376627531612160 |