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Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird

Natal or prebreeding dispersal is a key driver of the functioning, dynamics, and evolution of populations. Conditions experienced by individuals during development, that is, rearing conditions, may have serious consequences for the multiple components that shape natal dispersal processes. Rearing co...

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Autores principales: Azpillaga, Maialen, Real, Joan, Hernández‐Matías, Antonio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6053564/
https://www.ncbi.nlm.nih.gov/pubmed/30038767
http://dx.doi.org/10.1002/ece3.4165
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author Azpillaga, Maialen
Real, Joan
Hernández‐Matías, Antonio
author_facet Azpillaga, Maialen
Real, Joan
Hernández‐Matías, Antonio
author_sort Azpillaga, Maialen
collection PubMed
description Natal or prebreeding dispersal is a key driver of the functioning, dynamics, and evolution of populations. Conditions experienced by individuals during development, that is, rearing conditions, may have serious consequences for the multiple components that shape natal dispersal processes. Rearing conditions vary as a result of differences in parental and environmental quality, and it has been shown that favorable rearing conditions are beneficial for individuals throughout their lives. However, the long‐term consequences of rearing conditions on natal dispersal are still not fully understood in long‐lived birds. In this study, we aim to test the following hypotheses to address the relationship between rearing conditions and certain components of the natal dispersal process in Bonelli’s eagle (Aquila fasciata): (1) The body condition of nestlings depends on the quality of the territory and/or breeders; and (2) the survival until recruitment, (3) the age of recruitment, and (4) the natal dispersal distance (NDD) all depend on rearing conditions. As expected, nestlings reared in territories with high past productivity of chicks had better body condition, which indicates that both body condition and past productivity reflect the rearing conditions under which chicks are raised. In addition, chicks raised in territories with high past productivity and with good body condition had greater chances of surviving until recruitment. Furthermore, birds that have better condition recruit earlier, and males recruit at a younger age than females. At last, although females in good body condition exhibited higher NDD when they recruited at younger ages, this pattern was not observed in either older females or males. Overall, this study provides evidence that rearing conditions have important long‐term consequences in long‐lived birds. On the basis of our results, we advocate that conservation managers work actively in the promotion of actions aimed at improving the rearing conditions under which individuals develop in threatened populations.
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spelling pubmed-60535642018-07-23 Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird Azpillaga, Maialen Real, Joan Hernández‐Matías, Antonio Ecol Evol Original Research Natal or prebreeding dispersal is a key driver of the functioning, dynamics, and evolution of populations. Conditions experienced by individuals during development, that is, rearing conditions, may have serious consequences for the multiple components that shape natal dispersal processes. Rearing conditions vary as a result of differences in parental and environmental quality, and it has been shown that favorable rearing conditions are beneficial for individuals throughout their lives. However, the long‐term consequences of rearing conditions on natal dispersal are still not fully understood in long‐lived birds. In this study, we aim to test the following hypotheses to address the relationship between rearing conditions and certain components of the natal dispersal process in Bonelli’s eagle (Aquila fasciata): (1) The body condition of nestlings depends on the quality of the territory and/or breeders; and (2) the survival until recruitment, (3) the age of recruitment, and (4) the natal dispersal distance (NDD) all depend on rearing conditions. As expected, nestlings reared in territories with high past productivity of chicks had better body condition, which indicates that both body condition and past productivity reflect the rearing conditions under which chicks are raised. In addition, chicks raised in territories with high past productivity and with good body condition had greater chances of surviving until recruitment. Furthermore, birds that have better condition recruit earlier, and males recruit at a younger age than females. At last, although females in good body condition exhibited higher NDD when they recruited at younger ages, this pattern was not observed in either older females or males. Overall, this study provides evidence that rearing conditions have important long‐term consequences in long‐lived birds. On the basis of our results, we advocate that conservation managers work actively in the promotion of actions aimed at improving the rearing conditions under which individuals develop in threatened populations. John Wiley and Sons Inc. 2018-06-13 /pmc/articles/PMC6053564/ /pubmed/30038767 http://dx.doi.org/10.1002/ece3.4165 Text en © 2018 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
Azpillaga, Maialen
Real, Joan
Hernández‐Matías, Antonio
Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
title Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
title_full Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
title_fullStr Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
title_full_unstemmed Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
title_short Effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
title_sort effects of rearing conditions on natal dispersal processes in a long‐lived predator bird
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6053564/
https://www.ncbi.nlm.nih.gov/pubmed/30038767
http://dx.doi.org/10.1002/ece3.4165
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