Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird
1. 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...
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Online Access: | https://hdl.handle.net/11250/2738354 https://doi.org/10.1111/1365-2435.13632 |
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ftunivbergen:oai:bora.uib.no:11250/2738354 2023-05-15T13:42:15+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 Zahn, Sandrine Descamps, Sebastien 2020 application/pdf https://hdl.handle.net/11250/2738354 https://doi.org/10.1111/1365-2435.13632 eng eng Wiley Norges forskningsråd: xxxxxx Egen institusjon: Norwegian institute for nature research (NINA) urn:issn:0269-8463 https://hdl.handle.net/11250/2738354 https://doi.org/10.1111/1365-2435.13632 cristin:1822169 Functional Ecology. 2020, 34 (9), 1839-1856. Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no Copyright 2020 The Authors. Functional Ecology 1839-1856 34 9 VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1111/1365-2435.13632 2023-03-14T17:44:37Z 1. 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. 2. 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. 3. 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). 4. 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Petrel Antarctica Sea ice Thalassoica antarctica University of Bergen: Bergen Open Research Archive (BORA-UiB) Antarctic The Antarctic Functional Ecology 34 9 1839 1856 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel Zahn, Sandrine Descamps, Sebastien Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
1. 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. 2. 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. 3. 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). 4. 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 ... |
format |
Article in Journal/Newspaper |
author |
Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel Zahn, Sandrine Descamps, Sebastien |
author_facet |
Tarroux, Arnaud Cherel, Yves Fauchald, Per Kato, Akiko Love, Oliver P. Ropert-Coudert, Yan Spreen, Gunnar Varpe, Øystein Weimerskirch, Henri Yoccoz, Nigel Zahn, Sandrine Descamps, Sebastien |
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 |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2738354 https://doi.org/10.1111/1365-2435.13632 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Petrel Antarctica Sea ice Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctic Petrel Antarctica Sea ice Thalassoica antarctica |
op_source |
Functional Ecology 1839-1856 34 9 |
op_relation |
Norges forskningsråd: xxxxxx Egen institusjon: Norwegian institute for nature research (NINA) urn:issn:0269-8463 https://hdl.handle.net/11250/2738354 https://doi.org/10.1111/1365-2435.13632 cristin:1822169 Functional Ecology. 2020, 34 (9), 1839-1856. |
op_rights |
Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no Copyright 2020 The Authors. |
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 |
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1766165845860417536 |