Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals
International audience The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are...
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ftunivrochelle:oai:HAL:hal-01534256v1 2024-02-11T09:57:22+01:00 Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals Jeanniard-Du-Dot, Tiphaine Trites, Andrew W. Arnould, John P.Y. Guinet, Christophe Fisheries Centre (Marine Mammal Research Unit) University of British Columbia (UBC) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Marine Mammal Research Unit (University of British Columbia) School of Life and Environmental Sciences Deakin University Burwood 2017-04-28 https://hal.science/hal-01534256 https://doi.org/10.1371/journal.pone.0174001 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0174001 hal-01534256 https://hal.science/hal-01534256 doi:10.1371/journal.pone.0174001 PUBMEDCENTRAL: PMC5409505 ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-01534256 PLoS ONE, 2017, 12 (4), pp.e0174001. ⟨10.1371/journal.pone.0174001⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftunivrochelle https://doi.org/10.1371/journal.pone.0174001 2024-01-23T23:35:33Z International audience The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are likely to be more successful at raising viable offspring than individuals that forage less efficiently. Our goal was to test this prediction in large long-lived mammals under free-ranging conditions. To do so, we equipped 20 lactating Antarctic fur seals (Arctocephalus gazella) breeding on Kerguelen Island in the Southern Ocean with tags that recorded GPS locations, depth and tri-axial acceleration to determine at-sea behaviours and detailed time-activity budgets during their foraging trips. We also simultaneously measured energy spent at sea using the doubly-labeled water (DLW) method, and estimated the energy acquired while foraging from 1) type and energy content of prey species present in scat remains, and 2) numbers of prey capture attempts determined from head acceleration. Finally, we followed the growth of 36 pups from birth until weaning (of which 20 were the offspring of our 20 tracked mothers), and used the relative differences in body mass of pups at weaning as an index of first year survival and thus the reproductive success of their mothers. Our results show that females with greater foraging efficiencies produced relatively bigger pups at weaning. These mothers achieved greater foraging efficiency by extracting more energy per minute of diving rather than by reducing energy expenditure. This strategy also resulted in the females spending less time diving and less time overall at sea, which allowed them to deliver higher quality milk to their pups, or allowed their pups to suckle more frequently, or both. The linkage we demonstrate between reproductive success and the quality of individuals as foragers provides an individual-based quantitative framework to investigate how changes in the availability ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Southern Ocean HAL - Université de La Rochelle Antarctic Southern Ocean Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) PLOS ONE 12 4 e0174001 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Jeanniard-Du-Dot, Tiphaine Trites, Andrew W. Arnould, John P.Y. Guinet, Christophe Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are likely to be more successful at raising viable offspring than individuals that forage less efficiently. Our goal was to test this prediction in large long-lived mammals under free-ranging conditions. To do so, we equipped 20 lactating Antarctic fur seals (Arctocephalus gazella) breeding on Kerguelen Island in the Southern Ocean with tags that recorded GPS locations, depth and tri-axial acceleration to determine at-sea behaviours and detailed time-activity budgets during their foraging trips. We also simultaneously measured energy spent at sea using the doubly-labeled water (DLW) method, and estimated the energy acquired while foraging from 1) type and energy content of prey species present in scat remains, and 2) numbers of prey capture attempts determined from head acceleration. Finally, we followed the growth of 36 pups from birth until weaning (of which 20 were the offspring of our 20 tracked mothers), and used the relative differences in body mass of pups at weaning as an index of first year survival and thus the reproductive success of their mothers. Our results show that females with greater foraging efficiencies produced relatively bigger pups at weaning. These mothers achieved greater foraging efficiency by extracting more energy per minute of diving rather than by reducing energy expenditure. This strategy also resulted in the females spending less time diving and less time overall at sea, which allowed them to deliver higher quality milk to their pups, or allowed their pups to suckle more frequently, or both. The linkage we demonstrate between reproductive success and the quality of individuals as foragers provides an individual-based quantitative framework to investigate how changes in the availability ... |
author2 |
Fisheries Centre (Marine Mammal Research Unit) University of British Columbia (UBC) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Marine Mammal Research Unit (University of British Columbia) School of Life and Environmental Sciences Deakin University Burwood |
format |
Article in Journal/Newspaper |
author |
Jeanniard-Du-Dot, Tiphaine Trites, Andrew W. Arnould, John P.Y. Guinet, Christophe |
author_facet |
Jeanniard-Du-Dot, Tiphaine Trites, Andrew W. Arnould, John P.Y. Guinet, Christophe |
author_sort |
Jeanniard-Du-Dot, Tiphaine |
title |
Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
title_short |
Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
title_full |
Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
title_fullStr |
Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
title_full_unstemmed |
Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
title_sort |
reproductive success is energetically linked to foraging efficiency in antarctic fur seals |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-01534256 https://doi.org/10.1371/journal.pone.0174001 |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Antarctic Southern Ocean Kerguelen Kerguelen Island |
geographic_facet |
Antarctic Southern Ocean Kerguelen Kerguelen Island |
genre |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Southern Ocean |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-01534256 PLoS ONE, 2017, 12 (4), pp.e0174001. ⟨10.1371/journal.pone.0174001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0174001 hal-01534256 https://hal.science/hal-01534256 doi:10.1371/journal.pone.0174001 PUBMEDCENTRAL: PMC5409505 |
op_doi |
https://doi.org/10.1371/journal.pone.0174001 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
4 |
container_start_page |
e0174001 |
_version_ |
1790609661650534400 |