Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats

Urban endocrine ecology aims to understand how organisms cope with new sources of stress and maintain allostatic load to thrive in an increasingly urbanized world. Recent research efforts have yielded controversial results based on short-term measures of stress, without exploring its fitness effects...

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Autor principal:	Rebolo Ifran, Natalia
Publicado:	2015
Materias:	animal bird ecosystem fear human mental stress physiological stress population dynamics theoretical model Animals Birds Ecosystem Fear Humans Models, Theoretical Population Dynamics Stress, Physiological Stress, Psychological
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v5_n_p_ReboloIfran http://hdl.handle.net/20.500.12110/paper_20452322_v5_n_p_ReboloIfran
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_20452322_v5_n_p_ReboloIfran
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spelling	paper:paper_20452322_v5_n_p_ReboloIfran2023-06-08T16:33:23Z Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats Rebolo Ifran, Natalia animal bird ecosystem fear human mental stress physiological stress population dynamics theoretical model Animals Birds Ecosystem Fear Humans Models, Theoretical Population Dynamics Stress, Physiological Stress, Psychological Urban endocrine ecology aims to understand how organisms cope with new sources of stress and maintain allostatic load to thrive in an increasingly urbanized world. Recent research efforts have yielded controversial results based on short-term measures of stress, without exploring its fitness effects. We measured feather corticosterone (CORT<inf>f</inf>, reflecting the duration and amplitude of glucocorticoid secretion over several weeks) and subsequent annual survival in urban and rural burrowing owls. This species shows high individual consistency in fear of humans (i.e., flight initiation distance, FID), allowing us to hypothesize that individuals distribute among habitats according to their tolerance to human disturbance. FIDs were shorter in urban than in rural birds, but CORT<inf>f</inf> levels did not differ, nor were correlated to FIDs. Survival was twice as high in urban as in rural birds and links with CORT<inf>f</inf> varied between habitats: while a quadratic relationship supports stabilizing selection in urban birds, high predation rates may have masked CORT<inf>f</inf>-survival relationship in rural ones. These results evidence that urban life does not constitute an additional source of stress for urban individuals, as shown by their near identical CORT<inf>f</inf> values compared with rural conspecifics supporting the non-random distribution of individuals among habitats according to their behavioural phenotypes. Fil:Rebolo-Ifran, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v5_n_p_ReboloIfran http://hdl.handle.net/20.500.12110/paper_20452322_v5_n_p_ReboloIfran
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	animal bird ecosystem fear human mental stress physiological stress population dynamics theoretical model Animals Birds Ecosystem Fear Humans Models, Theoretical Population Dynamics Stress, Physiological Stress, Psychological
spellingShingle	animal bird ecosystem fear human mental stress physiological stress population dynamics theoretical model Animals Birds Ecosystem Fear Humans Models, Theoretical Population Dynamics Stress, Physiological Stress, Psychological Rebolo Ifran, Natalia Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
topic_facet	animal bird ecosystem fear human mental stress physiological stress population dynamics theoretical model Animals Birds Ecosystem Fear Humans Models, Theoretical Population Dynamics Stress, Physiological Stress, Psychological
description	Urban endocrine ecology aims to understand how organisms cope with new sources of stress and maintain allostatic load to thrive in an increasingly urbanized world. Recent research efforts have yielded controversial results based on short-term measures of stress, without exploring its fitness effects. We measured feather corticosterone (CORT<inf>f</inf>, reflecting the duration and amplitude of glucocorticoid secretion over several weeks) and subsequent annual survival in urban and rural burrowing owls. This species shows high individual consistency in fear of humans (i.e., flight initiation distance, FID), allowing us to hypothesize that individuals distribute among habitats according to their tolerance to human disturbance. FIDs were shorter in urban than in rural birds, but CORT<inf>f</inf> levels did not differ, nor were correlated to FIDs. Survival was twice as high in urban as in rural birds and links with CORT<inf>f</inf> varied between habitats: while a quadratic relationship supports stabilizing selection in urban birds, high predation rates may have masked CORT<inf>f</inf>-survival relationship in rural ones. These results evidence that urban life does not constitute an additional source of stress for urban individuals, as shown by their near identical CORT<inf>f</inf> values compared with rural conspecifics supporting the non-random distribution of individuals among habitats according to their behavioural phenotypes.
author	Rebolo Ifran, Natalia
author_facet	Rebolo Ifran, Natalia
author_sort	Rebolo Ifran, Natalia
title	Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
title_short	Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
title_full	Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
title_fullStr	Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
title_full_unstemmed	Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
title_sort	links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v5_n_p_ReboloIfran http://hdl.handle.net/20.500.12110/paper_20452322_v5_n_p_ReboloIfran
work_keys_str_mv	AT reboloifrannatalia linksbetweenfearofhumansstressandsurvivalsupportanonrandomdistributionofbirdsamongurbanandruralhabitats
_version_	1768546089936355328

Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats

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