caa a22 4500 605462429 CHVBK 20210128100248.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10211-013-0177-x doi (NATIONALLICENCE)springer-10.1007/s10211-013-0177-x Sexual differences in risk-taking behaviour of the Southern house wren during the nestling rearing stage [Elektronische Daten] [Gustavo Fernández, M. Corral, Paulo Llambías] When faced with a predator near the nest, breeding birds faced a dilemma: to continue providing parental care to their offspring exposing themselves to risk or to desert the nest for a brief period of time, exposing their offspring to harm due to the suspension of parental brooding and feeding. In this study, we analysed the response of nesting Southern house wrens (Troglodytes aedon musculus) to a predator model placed near the nest. The experiment was performed in 56 nests when nestling were 3-4 or 10-12days old. The model (a plastic decoy of the Great Horned Owl Bubo virginianus) was placed at 3m from the nest. Parent risk-taking was measured as the time elapsed for males and females to resume parental activities during the exposition to the model. We found that males and females delayed parental visits when exposed to the predator model, but females resumed them faster than males, irrespectively of the nesting stage. We also found that males refused to enter to the nest more frequently than females when exposed to the predator model. No effect of breeding experience or nesting stages was noted in the risk taking behaviour of adults. We suggest that sexual differences detected in this species reflect the higher ability of females to cope with the nestling needs and its lower lifetime expectancy. Springer-Verlag Berlin Heidelberg and ISPA, 2013 Brood value nationallicence Harm-to-offspring nationallicence Life-history traits nationallicence Predation risk nationallicence Troglodytes nationallicence Fernández Gustavo Departamento de Ecología, Genética y Evolución-IEGEBA CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina aut Corral M. Departamento de Ecología, Genética y Evolución-IEGEBA CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina aut Llambías Paulo Ecología del Comportamiento Animal, IADIZA, CCT-Mendoza, 5500, Mendoza, Argentina aut acta ethologica Springer Berlin Heidelberg 18/1(2015-02-01), 11-18 0873-9749 18:1<11 2015 18 10211 https://doi.org/10.1007/s10211-013-0177-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10211-013-0177-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fernández Gustavo Departamento de Ecología, Genética y Evolución-IEGEBA CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Corral M. Departamento de Ecología, Genética y Evolución-IEGEBA CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Llambías Paulo Ecología del Comportamiento Animal, IADIZA, CCT-Mendoza, 5500, Mendoza, Argentina aut NATIONALLICENCE 773 0- acta ethologica Springer Berlin Heidelberg 18/1(2015-02-01), 11-18 0873-9749 18:1<11 2015 18 10211