Recursos Naturales >
Estación Biológica de Doñana (EBD) >
(EBD) Artículos >
Closed Access item Condition and androgen levels: are condition-dependent and testosterone-mediated traits two sides of the same coin?
Marchant, Tracy A.
Bortolotti, Gary R.
|Citation:||ANIMAL BEHAVIOUR, 2006, 72, 97–103|
|Abstract:||The immunocompetence handicap hypothesis posits that androgen-mediated signals honestly indicate the responsiveness of the immune system because of the immunosuppressive effect of androgens. How- ever, androgen levels may also be related to nutritional status, and differences in body condition could be a more parsimonious explanation for variation in the expression of the signal. We maintained captive male red-legged partridges, Alectoris rufa, under regulated food shortage until they reached 85% of their initial body mass. Controls were provided with food ad libitum. After food shortage, experimental birds had lower androgen and higher corticosterone levels than controls. The condition dependence in andro- gen levels suggests that androgen-mediated signals could be indicating general nutritional state rather than immune function speciﬁcally. We propose that androgen-dependent signals may act as indicators of body condition or indicators of immune system quality, depending on the nutritional status of the individual.|
|Publisher version (URL):||http://dx.doi.org/10.1016/j.anbehav.2005.09.021|
|Appears in Collections:||(EBD) Artículos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.