Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird
Abstract Senescence has been widely documented in wild vertebrate populations, yet the proximate drivers of age‐related declines in breeding success, including allocation trade‐offs and links with foraging performance, are poorly understood. For long‐lived, migratory species, the non‐breeding period...
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Online Access: | http://dx.doi.org/10.1111/1365-2435.13120 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13120 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13120 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13120 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13120 |
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crwiley:10.1111/1365-2435.13120 2024-06-23T07:52:22+00:00 Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird Clay, Thomas A. Pearmain, Elizabeth J. McGill, Rona A. R. Manica, Andrea Phillips, Richard A. Isaksson, Caroline British Antarctic Survey 2018 http://dx.doi.org/10.1111/1365-2435.13120 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13120 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13120 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13120 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13120 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Functional Ecology volume 32, issue 7, page 1832-1846 ISSN 0269-8463 1365-2435 journal-article 2018 crwiley https://doi.org/10.1111/1365-2435.13120 2024-06-04T06:39:55Z Abstract Senescence has been widely documented in wild vertebrate populations, yet the proximate drivers of age‐related declines in breeding success, including allocation trade‐offs and links with foraging performance, are poorly understood. For long‐lived, migratory species, the non‐breeding period represents a critical time for investment in self‐maintenance and restoration of body condition, which in many species is linked to fitness. However, the relationships between age, non‐breeding foraging behaviour and fitness remain largely unexplored. We performed a cross‐sectional study, investigating age‐related variation in the foraging activity, distribution and diet of an extremely long‐lived seabird, the wandering albatross Diomedea exulans , during the non‐breeding period. Eighty‐two adults aged 8–33 years were tracked with geolocator‐immersion loggers, and body feathers were sampled for stable isotope analysis. We tested for variation in metrics of foraging behaviour and linked age‐related trends to subsequent reproductive performance. There was an age‐related decline in the number of landings (a proxy of foraging effort) during daylight hours, and a decrease in body feather δ 13 C values in older males but not females, yet this did not accompany an age‐related shift in distributions. Males conducted fewer landings than females, and the sexes showed some spatial segregation, with males foraging further south, likely due to their differential utilization of winds. Although younger (<20 years) birds had higher foraging effort, they all went on to breed successfully the following season. In contrast, among older (20+ years) birds, individuals that landed more often were more likely to defer breeding or fail during incubation, suggesting they have lower foraging success. As far as we are aware, this is the first demonstration of an age‐specific carry‐over effect of foraging behaviour in the non‐breeding period on subsequent reproductive performance. This link between foraging behaviour and fitness in late but ... Article in Journal/Newspaper Diomedea exulans Wandering Albatross Wiley Online Library Functional Ecology 32 7 1832 1846 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Senescence has been widely documented in wild vertebrate populations, yet the proximate drivers of age‐related declines in breeding success, including allocation trade‐offs and links with foraging performance, are poorly understood. For long‐lived, migratory species, the non‐breeding period represents a critical time for investment in self‐maintenance and restoration of body condition, which in many species is linked to fitness. However, the relationships between age, non‐breeding foraging behaviour and fitness remain largely unexplored. We performed a cross‐sectional study, investigating age‐related variation in the foraging activity, distribution and diet of an extremely long‐lived seabird, the wandering albatross Diomedea exulans , during the non‐breeding period. Eighty‐two adults aged 8–33 years were tracked with geolocator‐immersion loggers, and body feathers were sampled for stable isotope analysis. We tested for variation in metrics of foraging behaviour and linked age‐related trends to subsequent reproductive performance. There was an age‐related decline in the number of landings (a proxy of foraging effort) during daylight hours, and a decrease in body feather δ 13 C values in older males but not females, yet this did not accompany an age‐related shift in distributions. Males conducted fewer landings than females, and the sexes showed some spatial segregation, with males foraging further south, likely due to their differential utilization of winds. Although younger (<20 years) birds had higher foraging effort, they all went on to breed successfully the following season. In contrast, among older (20+ years) birds, individuals that landed more often were more likely to defer breeding or fail during incubation, suggesting they have lower foraging success. As far as we are aware, this is the first demonstration of an age‐specific carry‐over effect of foraging behaviour in the non‐breeding period on subsequent reproductive performance. This link between foraging behaviour and fitness in late but ... |
author2 |
Isaksson, Caroline British Antarctic Survey |
format |
Article in Journal/Newspaper |
author |
Clay, Thomas A. Pearmain, Elizabeth J. McGill, Rona A. R. Manica, Andrea Phillips, Richard A. |
spellingShingle |
Clay, Thomas A. Pearmain, Elizabeth J. McGill, Rona A. R. Manica, Andrea Phillips, Richard A. Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
author_facet |
Clay, Thomas A. Pearmain, Elizabeth J. McGill, Rona A. R. Manica, Andrea Phillips, Richard A. |
author_sort |
Clay, Thomas A. |
title |
Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
title_short |
Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
title_full |
Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
title_fullStr |
Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
title_full_unstemmed |
Age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
title_sort |
age‐related variation in non‐breeding foraging behaviour and carry‐over effects on fitness in an extremely long‐lived bird |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/1365-2435.13120 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13120 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13120 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13120 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13120 |
genre |
Diomedea exulans Wandering Albatross |
genre_facet |
Diomedea exulans Wandering Albatross |
op_source |
Functional Ecology volume 32, issue 7, page 1832-1846 ISSN 0269-8463 1365-2435 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2435.13120 |
container_title |
Functional Ecology |
container_volume |
32 |
container_issue |
7 |
container_start_page |
1832 |
op_container_end_page |
1846 |
_version_ |
1802643642773405696 |