Behavioral responses to encounter of fishing boats in wandering albatrosses
Abstract Animals are attracted to human food subsidies worldwide. The behavioral response of individuals to these resources is rarely described in detail, beyond chances of encounters. Seabirds for instance scavenge in large numbers at fishing boats, triggering crucial conservation issues, but how t...
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crwiley:10.1002/ece3.2677 2024-06-02T08:05:46+00:00 Behavioral responses to encounter of fishing boats in wandering albatrosses Collet, Julien Patrick, Samantha C. Weimerskirch, Henri Institut Polaire Français Paul Emile Victor 2017 http://dx.doi.org/10.1002/ece3.2677 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2677 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2677 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 7, issue 10, page 3335-3347 ISSN 2045-7758 2045-7758 journal-article 2017 crwiley https://doi.org/10.1002/ece3.2677 2024-05-03T11:18:54Z Abstract Animals are attracted to human food subsidies worldwide. The behavioral response of individuals to these resources is rarely described in detail, beyond chances of encounters. Seabirds for instance scavenge in large numbers at fishing boats, triggering crucial conservation issues, but how the response to boats varies across encounters is poorly known. Here we examine the behavioral response of wandering albatrosses ( Diomedea exulans ), equipped with GPS tags, to longline fishing boats operating near their colony for which we had access to vessel monitoring system data. We distinguish between encounters (flying within 30 km of a boat) and attendance behavior (sitting on the sea within 3 km of a boat), and examine factors affecting each. In particular, we test hypotheses that the response to encountered boats should vary with sex and age in this long‐lived dimorphic species. Among the 60% trips that encountered boats at least once, 80% of them contained attendance (but attendance followed only 60% of each single encounter). Birds were more attracted and remained attending longer when boats were hauling lines, despite the measures enforced by this fleet to limit food availability during operations. Sex and age of birds had low influence on the response to boats, except the year when fewer boats came fishing in the area, and younger birds were attending further from boats compared to older birds. Net mass gain of birds was similar across sex and not affected by time spent attending boats. Our results indicate albatrosses extensively attend this fishery, with no clear advantages, questioning impacts on foraging time budgets. Factors responsible for sex foraging segregation at larger scale seem not to operate at this fleet near the colony and are not consistent with predictions of optimal foraging theory on potential individual dominance asymmetries. This approach complements studies of large‐scale overlap of animals with human subsidies. Article in Journal/Newspaper Diomedea exulans Wiley Online Library Ecology and Evolution 7 10 3335 3347 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Animals are attracted to human food subsidies worldwide. The behavioral response of individuals to these resources is rarely described in detail, beyond chances of encounters. Seabirds for instance scavenge in large numbers at fishing boats, triggering crucial conservation issues, but how the response to boats varies across encounters is poorly known. Here we examine the behavioral response of wandering albatrosses ( Diomedea exulans ), equipped with GPS tags, to longline fishing boats operating near their colony for which we had access to vessel monitoring system data. We distinguish between encounters (flying within 30 km of a boat) and attendance behavior (sitting on the sea within 3 km of a boat), and examine factors affecting each. In particular, we test hypotheses that the response to encountered boats should vary with sex and age in this long‐lived dimorphic species. Among the 60% trips that encountered boats at least once, 80% of them contained attendance (but attendance followed only 60% of each single encounter). Birds were more attracted and remained attending longer when boats were hauling lines, despite the measures enforced by this fleet to limit food availability during operations. Sex and age of birds had low influence on the response to boats, except the year when fewer boats came fishing in the area, and younger birds were attending further from boats compared to older birds. Net mass gain of birds was similar across sex and not affected by time spent attending boats. Our results indicate albatrosses extensively attend this fishery, with no clear advantages, questioning impacts on foraging time budgets. Factors responsible for sex foraging segregation at larger scale seem not to operate at this fleet near the colony and are not consistent with predictions of optimal foraging theory on potential individual dominance asymmetries. This approach complements studies of large‐scale overlap of animals with human subsidies. |
author2 |
Institut Polaire Français Paul Emile Victor |
format |
Article in Journal/Newspaper |
author |
Collet, Julien Patrick, Samantha C. Weimerskirch, Henri |
spellingShingle |
Collet, Julien Patrick, Samantha C. Weimerskirch, Henri Behavioral responses to encounter of fishing boats in wandering albatrosses |
author_facet |
Collet, Julien Patrick, Samantha C. Weimerskirch, Henri |
author_sort |
Collet, Julien |
title |
Behavioral responses to encounter of fishing boats in wandering albatrosses |
title_short |
Behavioral responses to encounter of fishing boats in wandering albatrosses |
title_full |
Behavioral responses to encounter of fishing boats in wandering albatrosses |
title_fullStr |
Behavioral responses to encounter of fishing boats in wandering albatrosses |
title_full_unstemmed |
Behavioral responses to encounter of fishing boats in wandering albatrosses |
title_sort |
behavioral responses to encounter of fishing boats in wandering albatrosses |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/ece3.2677 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2677 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2677 |
genre |
Diomedea exulans |
genre_facet |
Diomedea exulans |
op_source |
Ecology and Evolution volume 7, issue 10, page 3335-3347 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.2677 |
container_title |
Ecology and Evolution |
container_volume |
7 |
container_issue |
10 |
container_start_page |
3335 |
op_container_end_page |
3347 |
_version_ |
1800750642142117888 |