Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird
Individual heterogeneity in diet and foraging behaviour is common in wild animal populations, and can be a strong determinant of how populations respond to environmental changes. Within populations, variation in foraging behaviour and the occurrence of individual tactics in relation to resources dis...
Published in: | Functional Ecology |
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Online Access: | https://scholar.uwindsor.ca/ibiopub/32 https://doi.org/10.1111/1365-2435.13632 |
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ftunivwindsor:oai:scholar.uwindsor.ca:ibiopub-1031 2023-06-11T04:05:20+02:00 Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel G. Zahn, Sandrine Descamps, Sébastien 2020-09-01T07:00:00Z https://scholar.uwindsor.ca/ibiopub/32 https://doi.org/10.1111/1365-2435.13632 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/ibiopub/32 doi:10.1111/1365-2435.13632 https://doi.org/10.1111/1365-2435.13632 Integrative Biology Publications Antarctic petrel GPS tracking individual variation optimal foraging physiological indicators Southern Ocean stable isotopes Svarthamaren breeding colony text 2020 ftunivwindsor https://doi.org/10.1111/1365-2435.13632 2023-05-06T19:11:20Z Individual heterogeneity in diet and foraging behaviour is common in wild animal populations, and can be a strong determinant of how populations respond to environmental changes. Within populations, variation in foraging behaviour and the occurrence of individual tactics in relation to resources distribution can help explain differences in individual fitness, and ultimately identify important factors affecting population dynamics. We examined how foraging behaviour and habitat during the breeding period related to the physiological state of a long-ranging seabird adapted to sea ice, the Antarctic petrel Thalassoica antarctica. Firstly, using GPS tracking and state-switching movement modelling (hidden Markov models) on 124 individual birds, we tested for the occurrence of distinct foraging tactics within our study population. Our results highlight a large variation in the movement and foraging behaviour of a very mobile seabird, and delineate distinct foraging tactics along a gradient from foraging in dense pack ice to foraging in open water. Secondly, we investigated the effects of these foraging tactics on individual state at return from a foraging trip. We combined movement data with morphometric and physiological measurements of a suite of plasma metabolites that provided a general picture of a bird's individual state. Foraging in denser sea ice was associated with lower gain in body mass during brooding, as well as lower level of energy acquisition (plasma triacylglycerol) during both brooding and incubation. We found no clear relationship between the foraging tactic in relation to sea ice and the energetic stress (changes in plasma corticosterone), energetic balance (β-hydroxybutyrate) or trophic level (δ15N). However, a shorter foraging range was related to both the energetic balance (positively) and the trophic level (negatively). Our results highlight a diverse range of foraging tactics in relation to sea ice in Antarctic petrels. While the various foraging tactics do not seem to strongly alter energetic ... Text Antarc* Antarctic Antarctic Petrel Antarctica Sea ice Southern Ocean Thalassoica antarctica University of Windsor, Ontario: Scholarship at UWindsor Antarctic Southern Ocean The Antarctic Svarthamaren ENVELOPE(3.423,3.423,-54.438,-54.438) Functional Ecology 34 9 1839 1856 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Antarctic petrel GPS tracking individual variation optimal foraging physiological indicators Southern Ocean stable isotopes Svarthamaren breeding colony |
spellingShingle |
Antarctic petrel GPS tracking individual variation optimal foraging physiological indicators Southern Ocean stable isotopes Svarthamaren breeding colony Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel G. Zahn, Sandrine Descamps, Sébastien Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
topic_facet |
Antarctic petrel GPS tracking individual variation optimal foraging physiological indicators Southern Ocean stable isotopes Svarthamaren breeding colony |
description |
Individual heterogeneity in diet and foraging behaviour is common in wild animal populations, and can be a strong determinant of how populations respond to environmental changes. Within populations, variation in foraging behaviour and the occurrence of individual tactics in relation to resources distribution can help explain differences in individual fitness, and ultimately identify important factors affecting population dynamics. We examined how foraging behaviour and habitat during the breeding period related to the physiological state of a long-ranging seabird adapted to sea ice, the Antarctic petrel Thalassoica antarctica. Firstly, using GPS tracking and state-switching movement modelling (hidden Markov models) on 124 individual birds, we tested for the occurrence of distinct foraging tactics within our study population. Our results highlight a large variation in the movement and foraging behaviour of a very mobile seabird, and delineate distinct foraging tactics along a gradient from foraging in dense pack ice to foraging in open water. Secondly, we investigated the effects of these foraging tactics on individual state at return from a foraging trip. We combined movement data with morphometric and physiological measurements of a suite of plasma metabolites that provided a general picture of a bird's individual state. Foraging in denser sea ice was associated with lower gain in body mass during brooding, as well as lower level of energy acquisition (plasma triacylglycerol) during both brooding and incubation. We found no clear relationship between the foraging tactic in relation to sea ice and the energetic stress (changes in plasma corticosterone), energetic balance (β-hydroxybutyrate) or trophic level (δ15N). However, a shorter foraging range was related to both the energetic balance (positively) and the trophic level (negatively). Our results highlight a diverse range of foraging tactics in relation to sea ice in Antarctic petrels. While the various foraging tactics do not seem to strongly alter energetic ... |
format |
Text |
author |
Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel G. Zahn, Sandrine Descamps, Sébastien |
author_facet |
Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel G. Zahn, Sandrine Descamps, Sébastien |
author_sort |
Tarroux, Arnaud |
title |
Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
title_short |
Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
title_full |
Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
title_fullStr |
Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
title_full_unstemmed |
Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
title_sort |
foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
publisher |
Scholarship at UWindsor |
publishDate |
2020 |
url |
https://scholar.uwindsor.ca/ibiopub/32 https://doi.org/10.1111/1365-2435.13632 |
long_lat |
ENVELOPE(3.423,3.423,-54.438,-54.438) |
geographic |
Antarctic Southern Ocean The Antarctic Svarthamaren |
geographic_facet |
Antarctic Southern Ocean The Antarctic Svarthamaren |
genre |
Antarc* Antarctic Antarctic Petrel Antarctica Sea ice Southern Ocean Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctic Petrel Antarctica Sea ice Southern Ocean Thalassoica antarctica |
op_source |
Integrative Biology Publications |
op_relation |
https://scholar.uwindsor.ca/ibiopub/32 doi:10.1111/1365-2435.13632 https://doi.org/10.1111/1365-2435.13632 |
op_doi |
https://doi.org/10.1111/1365-2435.13632 |
container_title |
Functional Ecology |
container_volume |
34 |
container_issue |
9 |
container_start_page |
1839 |
op_container_end_page |
1856 |
_version_ |
1768374564956405760 |