Behavioral responses to encounter of fishing boats in wandering albatrosses
International audience 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 iss...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01502382 https://doi.org/10.1002/ece3.2677 |
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ftunivnantes:oai:HAL:hal-01502382v1 2023-05-15T16:00:58+02:00 Behavioral responses to encounter of fishing boats in wandering albatrosses Collet, Julien Patrick, Samantha C. Weimerskirch, Henri Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) University of Liverpool 2017 https://hal.archives-ouvertes.fr/hal-01502382 https://doi.org/10.1002/ece3.2677 en eng HAL CCSD Wiley Open Access info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.2677 hal-01502382 https://hal.archives-ouvertes.fr/hal-01502382 doi:10.1002/ece3.2677 PUBMEDCENTRAL: PMC5433987 ISSN: 2045-7758 Ecology and Evolution https://hal.archives-ouvertes.fr/hal-01502382 Ecology and Evolution, 2017, 7 (10), pp.3335-3347. ⟨10.1002/ece3.2677⟩ Competition fisheries foraging decisions movement ecology seabirds vessel monitoring system [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftunivnantes https://doi.org/10.1002/ece3.2677 2023-01-04T00:06:13Z International audience 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 Université de Nantes: HAL-UNIV-NANTES Ecology and Evolution 7 10 3335 3347 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Competition fisheries foraging decisions movement ecology seabirds vessel monitoring system [SDE]Environmental Sciences |
spellingShingle |
Competition fisheries foraging decisions movement ecology seabirds vessel monitoring system [SDE]Environmental Sciences Collet, Julien Patrick, Samantha C. Weimerskirch, Henri Behavioral responses to encounter of fishing boats in wandering albatrosses |
topic_facet |
Competition fisheries foraging decisions movement ecology seabirds vessel monitoring system [SDE]Environmental Sciences |
description |
International audience 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 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) University of Liverpool |
format |
Article in Journal/Newspaper |
author |
Collet, Julien Patrick, Samantha C. Weimerskirch, Henri |
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 |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01502382 https://doi.org/10.1002/ece3.2677 |
genre |
Diomedea exulans |
genre_facet |
Diomedea exulans |
op_source |
ISSN: 2045-7758 Ecology and Evolution https://hal.archives-ouvertes.fr/hal-01502382 Ecology and Evolution, 2017, 7 (10), pp.3335-3347. ⟨10.1002/ece3.2677⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.2677 hal-01502382 https://hal.archives-ouvertes.fr/hal-01502382 doi:10.1002/ece3.2677 PUBMEDCENTRAL: PMC5433987 |
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 |
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1766396969397256192 |