Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).

Natal dispersal affects many processes such as population dynamics. So far, most studies have examined the intrinsic and extrinsic factors that determine the distance between the place of birth and of first breeding. In contrast, few researchers followed the first steps of dispersal soon after fledg...

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Autores principales:	Bettina Almasi, Carolina Massa, Lukas Jenni, Alexandre Roulin
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6064c83a066c4159a5c9894b7e26f8b1
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spelling	oai:doaj.org-article:6064c83a066c4159a5c9894b7e26f8b12021-12-02T20:04:43ZExogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).1932-620310.1371/journal.pone.0256038https://doaj.org/article/6064c83a066c4159a5c9894b7e26f8b12021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0256038https://doaj.org/toc/1932-6203Natal dispersal affects many processes such as population dynamics. So far, most studies have examined the intrinsic and extrinsic factors that determine the distance between the place of birth and of first breeding. In contrast, few researchers followed the first steps of dispersal soon after fledging. To study this gap, we radio-tracked 95 barn owl nestlings (Tyto alba) to locate their diurnal roost sites from the fledging stage until December. This was used to test whether the age of nest departure, post-fledging movements and dispersal distance were related to melanin-based coloration, which is correlated to fitness-related traits, as well as to corticosterone, a hormone that mediates a number of life history trade-offs and the physiological and behavioural responses to stressful situations. We found that the artificial administration of corticosterone delayed the age when juveniles left their parental home-range in females but not in males. During the first few months after fledging, longer dispersal distances were reached by females compared to males, by individuals marked with larger black feather spots compared to individuals with smaller spots, by larger individuals and by those experimentally treated with corticosterone. We conclude that the onset and magnitude of dispersal is sensitive to the stress hormone corticosterone, melanin-based coloration and body size.Bettina AlmasiCarolina MassaLukas JenniAlexandre RoulinPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0256038 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bettina Almasi Carolina Massa Lukas Jenni Alexandre Roulin Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).
description	Natal dispersal affects many processes such as population dynamics. So far, most studies have examined the intrinsic and extrinsic factors that determine the distance between the place of birth and of first breeding. In contrast, few researchers followed the first steps of dispersal soon after fledging. To study this gap, we radio-tracked 95 barn owl nestlings (Tyto alba) to locate their diurnal roost sites from the fledging stage until December. This was used to test whether the age of nest departure, post-fledging movements and dispersal distance were related to melanin-based coloration, which is correlated to fitness-related traits, as well as to corticosterone, a hormone that mediates a number of life history trade-offs and the physiological and behavioural responses to stressful situations. We found that the artificial administration of corticosterone delayed the age when juveniles left their parental home-range in females but not in males. During the first few months after fledging, longer dispersal distances were reached by females compared to males, by individuals marked with larger black feather spots compared to individuals with smaller spots, by larger individuals and by those experimentally treated with corticosterone. We conclude that the onset and magnitude of dispersal is sensitive to the stress hormone corticosterone, melanin-based coloration and body size.
format	article
author	Bettina Almasi Carolina Massa Lukas Jenni Alexandre Roulin
author_facet	Bettina Almasi Carolina Massa Lukas Jenni Alexandre Roulin
author_sort	Bettina Almasi
title	Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).
title_short	Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).
title_full	Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).
title_fullStr	Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).
title_full_unstemmed	Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).
title_sort	exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (tyto alba).
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/6064c83a066c4159a5c9894b7e26f8b1
work_keys_str_mv	AT bettinaalmasi exogenouscorticosteroneandmelaninbasedcolorationexplainvariationinjuveniledispersalbehaviourinthebarnowltytoalba AT carolinamassa exogenouscorticosteroneandmelaninbasedcolorationexplainvariationinjuveniledispersalbehaviourinthebarnowltytoalba AT lukasjenni exogenouscorticosteroneandmelaninbasedcolorationexplainvariationinjuveniledispersalbehaviourinthebarnowltytoalba AT alexandreroulin exogenouscorticosteroneandmelaninbasedcolorationexplainvariationinjuveniledispersalbehaviourinthebarnowltytoalba
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Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba).

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