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Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses

Pelagic seabirds breeding at high latitudes generally split their annual cycle between reproduction, migration, and wintering. During the breeding season, they are constrained in their foraging range due to reproduction while during winter months, and they often undertake long‐distance migrations. B...

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Autores principales: Ponchon, Aurore, Cornulier, Thomas, Hedd, April, Granadeiro, José Pedro, Catry, Paulo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6686306/
https://www.ncbi.nlm.nih.gov/pubmed/31410273
http://dx.doi.org/10.1002/ece3.5416
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author Ponchon, Aurore
Cornulier, Thomas
Hedd, April
Granadeiro, José Pedro
Catry, Paulo
author_facet Ponchon, Aurore
Cornulier, Thomas
Hedd, April
Granadeiro, José Pedro
Catry, Paulo
author_sort Ponchon, Aurore
collection PubMed
description Pelagic seabirds breeding at high latitudes generally split their annual cycle between reproduction, migration, and wintering. During the breeding season, they are constrained in their foraging range due to reproduction while during winter months, and they often undertake long‐distance migrations. Black‐browed albatrosses (Thalassarche melanophris) nesting in the Falkland archipelago remain within 700 km from their breeding colonies all year‐round and can therefore be considered as resident. Accordingly, at‐sea activity patterns are expected to be adjusted to the absence of migration. Likewise, breeding performance is expected to affect foraging, flying, and floating activities, as failed individuals are relieved from reproduction earlier than successful ones. Using geolocators coupled with a saltwater immersion sensor, we detailed the spatial distribution and temporal dynamics of at‐sea activity budgets of successful and failed breeding black‐browed albatrosses nesting in New Island, Falklands archipelago, over the breeding and subsequent nonbreeding season. The 90% monthly kernel distribution of failed and successful breeders suggested no spatial segregation. Both groups followed the same dynamics of foraging effort both during daylight and darkness all year, except during chick‐rearing, when successful breeders foraged more intensively. Failed and successful breeders started decreasing flying activities during daylight at the same time, 2–3 weeks after hatching period, but failed breeders reached their maximum floating activity during late chick‐rearing, 2 months before successful breeders. Moon cycle had a significant effect on activity budgets during darkness, with individuals generally more active during full moon. Our results highlight that successful breeders buffer potential reproductive costs during the nonbreeding season, and this provides a better understanding of how individuals adjust their spatial distribution and activity budgets according to their breeding performance in absence of migration.
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spelling pubmed-66863062019-08-13 Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses Ponchon, Aurore Cornulier, Thomas Hedd, April Granadeiro, José Pedro Catry, Paulo Ecol Evol Original Research Pelagic seabirds breeding at high latitudes generally split their annual cycle between reproduction, migration, and wintering. During the breeding season, they are constrained in their foraging range due to reproduction while during winter months, and they often undertake long‐distance migrations. Black‐browed albatrosses (Thalassarche melanophris) nesting in the Falkland archipelago remain within 700 km from their breeding colonies all year‐round and can therefore be considered as resident. Accordingly, at‐sea activity patterns are expected to be adjusted to the absence of migration. Likewise, breeding performance is expected to affect foraging, flying, and floating activities, as failed individuals are relieved from reproduction earlier than successful ones. Using geolocators coupled with a saltwater immersion sensor, we detailed the spatial distribution and temporal dynamics of at‐sea activity budgets of successful and failed breeding black‐browed albatrosses nesting in New Island, Falklands archipelago, over the breeding and subsequent nonbreeding season. The 90% monthly kernel distribution of failed and successful breeders suggested no spatial segregation. Both groups followed the same dynamics of foraging effort both during daylight and darkness all year, except during chick‐rearing, when successful breeders foraged more intensively. Failed and successful breeders started decreasing flying activities during daylight at the same time, 2–3 weeks after hatching period, but failed breeders reached their maximum floating activity during late chick‐rearing, 2 months before successful breeders. Moon cycle had a significant effect on activity budgets during darkness, with individuals generally more active during full moon. Our results highlight that successful breeders buffer potential reproductive costs during the nonbreeding season, and this provides a better understanding of how individuals adjust their spatial distribution and activity budgets according to their breeding performance in absence of migration. John Wiley and Sons Inc. 2019-07-17 /pmc/articles/PMC6686306/ /pubmed/31410273 http://dx.doi.org/10.1002/ece3.5416 Text en © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Ponchon, Aurore
Cornulier, Thomas
Hedd, April
Granadeiro, José Pedro
Catry, Paulo
Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
title Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
title_full Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
title_fullStr Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
title_full_unstemmed Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
title_short Effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
title_sort effect of breeding performance on the distribution and activity budgets of a predominantly resident population of black‐browed albatrosses
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6686306/
https://www.ncbi.nlm.nih.gov/pubmed/31410273
http://dx.doi.org/10.1002/ece3.5416
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