RT Journal Article
T1 Testosterone and helping behavior in the azure-winged magpie (Cyanopica cyanus): natural covariation and an experimental test
A1 de la Cruz, Carlos
A1 Solís, Elena
A1 Valencia-Ruíz, Juliána
A1 Chastel, Olivier
A1 Sorci, Gabriele
K1 Aves
K1 Hormonas
K1 Animales - Conducta parental
K1 Urracas
AB In this study, we investigated patterns of natural covariation between testosterone and reproductive status in a cooperatively breeding bird species, the azure- winged magpie (Cyanopica cyanus). To assess the relationship between testosterone and breeding behavior, we also manipulated testosterone (T) levels early in the season (before breeding started) using testosterone-filled or empty implants. Our results do not support the hypothesis that circulating testosterone levels affect the occurrence of helping behavior in the azure-winged magpie. Helping males had similar T levels to breeding males. Furthermore, experimentally augmented plasma T did not affect the likelihood of becoming either a helper or a breeder. Overall, these results are consistent with previous findings in other bird species and only give some support to the behavioral suppression hypothesis, sug- gesting that helping in the azure-winged magpie is a flexible behavioral option moderated in the short-term by social and ecological factors. Experimentally elevated testosterone levels, however, reduced the reproductive
PB Springer
YR 2003
FD 2003
LK https://hdl.handle.net/10630/34469
UL https://hdl.handle.net/10630/34469
LA eng
NO de la Cruz, C., Solís, E., Valencia, J. et al. Testosterone and helping behavior in the azure-winged magpie (Cyanopica cyanus): natural covariation and an experimental test. Behav Ecol Sociobiol 55, 103–111 (2003).
NO https://openpolicyfinder.jisc.ac.uk/id/publication/7864
NO Consejería de Educación, Ciencia y Tecnología of the Junta de Extremadura (Projects IPR98C015 to C.C. and IPR99A020 to C.C. and G.S.), by the Programme d’Actions Intégrées Franco Espagnol (Programme PICASSO) to G.S. and C.C, and by the ACI Jeunes Chercheurs to G.S.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026