Sex- and age-dependent patterns of survival and breeding success in a long-lived endangered avian scavenger

Show simple item record Sanz-Aguilar, A. Cortés-Avizanda, A. Serrano, D. Blanco, G. Ceballos, O. Grande, J.M. Tella, J.L. Donázar, J.A. 2019-09-18T11:43:41Z 2019-09-18T11:43:41Z
dc.description.abstract In long-lived species, the age-, stage- and/or sex-dependent patterns of survival and reproduction determine the evolution of life history strategies, the shape of the reproductive value, and ultimately population dynamics. We evaluate the combined effects of age and sex in recruitment, breeder survival and breeding success of the globally endangered Egyptian vulture (Neophron percnopterus), using 31-years of exhaustive data on marked individuals in Spain. Mean age of first reproduction was 7-yrs for both sexes, but females showed an earlier median and a larger variance than males. We found an age-related improvement in breeding success at the population level responding to the selective appearance and disappearance of phenotypes of different quality but unrelated to within-individual aging effects. Old males (≥8 yrs) showed a higher survival than both young males (≤7 yrs) and females, these later in turn not showing aging effects. Evolutionary trade-offs between age of recruitment and fitness (probably related to costs of territory acquisition and defense) as well as human-related mortality may explain these findings. Sex- and age-related differences in foraging strategies and susceptibility to toxics could be behind the relatively low survival of females and young males, adding a new concern for the conservation of this endangered species.
dc.format application/pdf
dc.relation.isformatof Reproducció del document publicat a:
dc.relation.ispartof Scientific Reports, 2017, vol. 7, num. 40204, p. 1-10
dc.rights cc-by (c) Sanz-Aguilar, A. et al., 2017
dc.subject.classification 59 - Zoologia
dc.subject.other 59 - Zoology
dc.title Sex- and age-dependent patterns of survival and breeding success in a long-lived endangered avian scavenger
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/publishedVersion 2019-09-18T11:43:42Z
dc.rights.accessRights info:eu-repo/semantics/openAccess

Files in this item

The following license files are associated with this item:

This item appears in the following Collection(s)

Show simple item record

cc-by (c) Sanz-Aguilar, A. et al., 2017 Except where otherwise noted, this item's license is described as cc-by (c) Sanz-Aguilar, A. et al., 2017

Search Repository

Advanced Search


My Account