Linear tracks and restricted temperature ranges characterise penguin foraging pathways
Marine predators are thought to follow sophisticated scale-dependent search strategies when seeking patchy and unpredictable prey. However, fine-scale information about these strategies has hitherto been difficult to obtain for diving predators that often remain at the sea surface for only limited p...
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ftnerc:oai:nora.nerc.ac.uk:11641 2023-05-15T17:03:54+02:00 Linear tracks and restricted temperature ranges characterise penguin foraging pathways Trathan, Phil N. Bishop, C. Maclean, G. Brown, P. Fleming, Andrew Collins, Martin Anthony 2008 text http://nora.nerc.ac.uk/id/eprint/11641/ https://nora.nerc.ac.uk/id/eprint/11641/1/m370p285.pdf http://www.int-res.com/articles/meps_oa/m370p285.pdf en eng Inter-Research https://nora.nerc.ac.uk/id/eprint/11641/1/m370p285.pdf Trathan, Phil N. orcid:0000-0001-6673-9930 Bishop, C.; Maclean, G.; Brown, P.; Fleming, Andrew orcid:0000-0002-0143-4527 Collins, Martin Anthony orcid:0000-0001-7132-8650 . 2008 Linear tracks and restricted temperature ranges characterise penguin foraging pathways. Marine Ecology Progress Series, 370. 285-294. https://doi.org/10.3354/meps07638 <https://doi.org/10.3354/meps07638> Marine Sciences Zoology Ecology and Environment Electronics Engineering and Technology Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.3354/meps07638 2023-02-04T19:27:30Z Marine predators are thought to follow sophisticated scale-dependent search strategies when seeking patchy and unpredictable prey. However, fine-scale information about these strategies has hitherto been difficult to obtain for diving predators that often remain at the sea surface for only limited periods of time. Using ARGOS telemetry and novel, low-powered, archival GPS, we followed the fine-scale at-sea behaviour of king penguins breeding on South Georgia. Results revealed that foraging pathways were generally linear, except at the finest scale, where movements probably reflected either fine-scale searching behaviour, or fine-scale random movements associated with having found prey. King penguins focused 45% of their foraging effort in waters with a specific surface temperature (5.0 to 5.5 degrees C) - an environmental cue potentially important in helping them locate prey, thereby reducing their need to expend energy in area-restricted search patterns. Within these waters, penguins slowed down and increased their dive effort and degree of meandering. First Passage Time analysis revealed that penguins focused much of their effort at local scales, generally in areas with a radius of 2 km. In these areas, penguins dived marginally deeper and targeted waters that, were significantly warmer at the bottom of their dives. Such information about fine-scale foraging behaviour will help increase our understanding of the environmental correlates that characterise areas where marine predators exploit their prey. The scale of these behavioural processes is better resolved using the fine-scale temporal and spatial resolution of GPS tracking data. Article in Journal/Newspaper King Penguins Natural Environment Research Council: NERC Open Research Archive Marine Ecology Progress Series 370 285 294 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences Zoology Ecology and Environment Electronics Engineering and Technology |
spellingShingle |
Marine Sciences Zoology Ecology and Environment Electronics Engineering and Technology Trathan, Phil N. Bishop, C. Maclean, G. Brown, P. Fleming, Andrew Collins, Martin Anthony Linear tracks and restricted temperature ranges characterise penguin foraging pathways |
topic_facet |
Marine Sciences Zoology Ecology and Environment Electronics Engineering and Technology |
description |
Marine predators are thought to follow sophisticated scale-dependent search strategies when seeking patchy and unpredictable prey. However, fine-scale information about these strategies has hitherto been difficult to obtain for diving predators that often remain at the sea surface for only limited periods of time. Using ARGOS telemetry and novel, low-powered, archival GPS, we followed the fine-scale at-sea behaviour of king penguins breeding on South Georgia. Results revealed that foraging pathways were generally linear, except at the finest scale, where movements probably reflected either fine-scale searching behaviour, or fine-scale random movements associated with having found prey. King penguins focused 45% of their foraging effort in waters with a specific surface temperature (5.0 to 5.5 degrees C) - an environmental cue potentially important in helping them locate prey, thereby reducing their need to expend energy in area-restricted search patterns. Within these waters, penguins slowed down and increased their dive effort and degree of meandering. First Passage Time analysis revealed that penguins focused much of their effort at local scales, generally in areas with a radius of 2 km. In these areas, penguins dived marginally deeper and targeted waters that, were significantly warmer at the bottom of their dives. Such information about fine-scale foraging behaviour will help increase our understanding of the environmental correlates that characterise areas where marine predators exploit their prey. The scale of these behavioural processes is better resolved using the fine-scale temporal and spatial resolution of GPS tracking data. |
format |
Article in Journal/Newspaper |
author |
Trathan, Phil N. Bishop, C. Maclean, G. Brown, P. Fleming, Andrew Collins, Martin Anthony |
author_facet |
Trathan, Phil N. Bishop, C. Maclean, G. Brown, P. Fleming, Andrew Collins, Martin Anthony |
author_sort |
Trathan, Phil N. |
title |
Linear tracks and restricted temperature ranges characterise penguin foraging pathways |
title_short |
Linear tracks and restricted temperature ranges characterise penguin foraging pathways |
title_full |
Linear tracks and restricted temperature ranges characterise penguin foraging pathways |
title_fullStr |
Linear tracks and restricted temperature ranges characterise penguin foraging pathways |
title_full_unstemmed |
Linear tracks and restricted temperature ranges characterise penguin foraging pathways |
title_sort |
linear tracks and restricted temperature ranges characterise penguin foraging pathways |
publisher |
Inter-Research |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/11641/ https://nora.nerc.ac.uk/id/eprint/11641/1/m370p285.pdf http://www.int-res.com/articles/meps_oa/m370p285.pdf |
genre |
King Penguins |
genre_facet |
King Penguins |
op_relation |
https://nora.nerc.ac.uk/id/eprint/11641/1/m370p285.pdf Trathan, Phil N. orcid:0000-0001-6673-9930 Bishop, C.; Maclean, G.; Brown, P.; Fleming, Andrew orcid:0000-0002-0143-4527 Collins, Martin Anthony orcid:0000-0001-7132-8650 . 2008 Linear tracks and restricted temperature ranges characterise penguin foraging pathways. Marine Ecology Progress Series, 370. 285-294. https://doi.org/10.3354/meps07638 <https://doi.org/10.3354/meps07638> |
op_doi |
https://doi.org/10.3354/meps07638 |
container_title |
Marine Ecology Progress Series |
container_volume |
370 |
container_start_page |
285 |
op_container_end_page |
294 |
_version_ |
1766057896101019648 |