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oai:riuma.uma.es:10630/344692026-02-03T11:11:11Zcom_10630_2254col_10630_37953

Testosterone and helping behavior in the azure-winged magpie (Cyanopica cyanus): natural covariation and an experimental test de la Cruz, Carlos Solís, Elena Valencia-Ruíz, Juliána Chastel, Olivier Sorci, Gabriele Aves Hormonas Animales - Conducta parental Urracas https://openpolicyfinder.jisc.ac.uk/id/publication/7864 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 2024-10-08T07:48:14Z 2024-10-08T07:48:14Z 2003 journal article 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). https://hdl.handle.net/10630/34469 10.1007/s00265-003-0674-4 eng open access Springer