Testing optimal foraging theory models on benthic divers
Empirical testing of optimal foraging models on diving air-breathing animals is limited due to difficulties in quantifying the prey field through direct observations. Here we used accelerometers to detect rapid head movements during prey encounter events (PEE) of free-ranging benthic-divers, Austral...
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ftdeakinunifig:oai:figshare.com:article/20891617 2023-05-15T18:43:24+02:00 Testing optimal foraging theory models on benthic divers D Foo J M Semmens John Arnould N Dorville Andrew Hoskins K Abernathy G J Marshall M A Hindell 2016-02-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30083250 https://figshare.com/articles/journal_contribution/Testing_optimal_foraging_theory_models_on_benthic_divers/20891617 unknown http://hdl.handle.net/10536/DRO/DU:30083250 https://figshare.com/articles/journal_contribution/Testing_optimal_foraging_theory_models_on_benthic_divers/20891617 All Rights Reserved Uncategorized accelerometry Arctocephalus pusillus doriferus benthic foragers biologging marine predators Science & Technology Life Sciences & Biomedicine Behavioral Sciences Zoology AUSTRALIAN FUR SEALS BREATH-HOLD DIVERS ANIMAL-BORNE VIDEO TIME ALLOCATION ACCELERATION DATA WEDDELL SEALS STRATEGIES BEHAVIOR SUCCESS TEMPERATURE Text Journal contribution 2016 ftdeakinunifig 2022-11-17T21:01:20Z Empirical testing of optimal foraging models on diving air-breathing animals is limited due to difficulties in quantifying the prey field through direct observations. Here we used accelerometers to detect rapid head movements during prey encounter events (PEE) of free-ranging benthic-divers, Australian fur seals, Arctocephalus pusillus doriferus. PEE signals from accelerometer data were validated by simultaneous video data. We then used PEEs as a measure of patch quality to test several optimal foraging model predictions. Seals had longer bottom durations in unfruitful dives (no PEE) than those with some foraging success (PEE. ≥. 1). However, when examined in greater detail, seals had longer bottom durations in dives with more PEEs, but shorter bottom durations in bouts (sequences of dives) with more PEEs. Our results suggest that seals were generally maximizing bottom durations in all foraging dives, characteristic of benthic divers. However, successful foraging dives might be more energetically costly (e.g. digestive costs), thus resulting in shorter bottom durations at the larger scale of bouts. Our study provides a case study of how the foraging behaviour of a central place forager foraging in a fairly homogeneous environment, with relatively high travel costs, may deviate from current foraging models under different situations. Future foraging models should aim to integrate other aspects (e.g. diet) of the foraging process for more accurate predictions. Other Non-Article Part of Journal/Newspaper Weddell Seals DRO - Deakin Research Online Weddell |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Uncategorized accelerometry Arctocephalus pusillus doriferus benthic foragers biologging marine predators Science & Technology Life Sciences & Biomedicine Behavioral Sciences Zoology AUSTRALIAN FUR SEALS BREATH-HOLD DIVERS ANIMAL-BORNE VIDEO TIME ALLOCATION ACCELERATION DATA WEDDELL SEALS STRATEGIES BEHAVIOR SUCCESS TEMPERATURE |
spellingShingle |
Uncategorized accelerometry Arctocephalus pusillus doriferus benthic foragers biologging marine predators Science & Technology Life Sciences & Biomedicine Behavioral Sciences Zoology AUSTRALIAN FUR SEALS BREATH-HOLD DIVERS ANIMAL-BORNE VIDEO TIME ALLOCATION ACCELERATION DATA WEDDELL SEALS STRATEGIES BEHAVIOR SUCCESS TEMPERATURE D Foo J M Semmens John Arnould N Dorville Andrew Hoskins K Abernathy G J Marshall M A Hindell Testing optimal foraging theory models on benthic divers |
topic_facet |
Uncategorized accelerometry Arctocephalus pusillus doriferus benthic foragers biologging marine predators Science & Technology Life Sciences & Biomedicine Behavioral Sciences Zoology AUSTRALIAN FUR SEALS BREATH-HOLD DIVERS ANIMAL-BORNE VIDEO TIME ALLOCATION ACCELERATION DATA WEDDELL SEALS STRATEGIES BEHAVIOR SUCCESS TEMPERATURE |
description |
Empirical testing of optimal foraging models on diving air-breathing animals is limited due to difficulties in quantifying the prey field through direct observations. Here we used accelerometers to detect rapid head movements during prey encounter events (PEE) of free-ranging benthic-divers, Australian fur seals, Arctocephalus pusillus doriferus. PEE signals from accelerometer data were validated by simultaneous video data. We then used PEEs as a measure of patch quality to test several optimal foraging model predictions. Seals had longer bottom durations in unfruitful dives (no PEE) than those with some foraging success (PEE. ≥. 1). However, when examined in greater detail, seals had longer bottom durations in dives with more PEEs, but shorter bottom durations in bouts (sequences of dives) with more PEEs. Our results suggest that seals were generally maximizing bottom durations in all foraging dives, characteristic of benthic divers. However, successful foraging dives might be more energetically costly (e.g. digestive costs), thus resulting in shorter bottom durations at the larger scale of bouts. Our study provides a case study of how the foraging behaviour of a central place forager foraging in a fairly homogeneous environment, with relatively high travel costs, may deviate from current foraging models under different situations. Future foraging models should aim to integrate other aspects (e.g. diet) of the foraging process for more accurate predictions. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
D Foo J M Semmens John Arnould N Dorville Andrew Hoskins K Abernathy G J Marshall M A Hindell |
author_facet |
D Foo J M Semmens John Arnould N Dorville Andrew Hoskins K Abernathy G J Marshall M A Hindell |
author_sort |
D Foo |
title |
Testing optimal foraging theory models on benthic divers |
title_short |
Testing optimal foraging theory models on benthic divers |
title_full |
Testing optimal foraging theory models on benthic divers |
title_fullStr |
Testing optimal foraging theory models on benthic divers |
title_full_unstemmed |
Testing optimal foraging theory models on benthic divers |
title_sort |
testing optimal foraging theory models on benthic divers |
publishDate |
2016 |
url |
http://hdl.handle.net/10536/DRO/DU:30083250 https://figshare.com/articles/journal_contribution/Testing_optimal_foraging_theory_models_on_benthic_divers/20891617 |
geographic |
Weddell |
geographic_facet |
Weddell |
genre |
Weddell Seals |
genre_facet |
Weddell Seals |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30083250 https://figshare.com/articles/journal_contribution/Testing_optimal_foraging_theory_models_on_benthic_divers/20891617 |
op_rights |
All Rights Reserved |
_version_ |
1766233798130794496 |