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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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_20452322_v5_n_p_ReboloIfran |
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todo:paper_20452322_v5_n_p_ReboloIfran2023-10-03T16:38:11Z Links between fear of humans, stress and survival support a non-random distribution of birds among urban and rural habitats Rebolo-Ifran, N. Carrete, M. Sanz-Aguilar, A. Rodriguez-Martinez, S. Cabezas, S. Marchant, T.A. Bortolotti, G.R. Tella, J.L. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20452322_v5_n_p_ReboloIfran |
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Universidad de Buenos Aires |
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I-28 |
| repository_str |
R-134 |
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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, N. Carrete, M. Sanz-Aguilar, A. Rodriguez-Martinez, S. Cabezas, S. Marchant, T.A. Bortolotti, G.R. Tella, J.L. 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. |
| format |
JOUR |
| author |
Rebolo-Ifran, N. Carrete, M. Sanz-Aguilar, A. Rodriguez-Martinez, S. Cabezas, S. Marchant, T.A. Bortolotti, G.R. Tella, J.L. |
| author_facet |
Rebolo-Ifran, N. Carrete, M. Sanz-Aguilar, A. Rodriguez-Martinez, S. Cabezas, S. Marchant, T.A. Bortolotti, G.R. Tella, J.L. |
| author_sort |
Rebolo-Ifran, N. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_20452322_v5_n_p_ReboloIfran |
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