Adrenal activity and anxiety-like behaviour in fur-chewing chinchillas (Chinchilla lanigera).

PONZIO M.F; MONFORT SL; BUSSO J.M.; CARLINI VP; RUIZ RD; FIOL DE CUNEO M

HORMONES AND BEHAVIOR

ACADEMIC PRESS INC ELSEVIER SCIENCE

Año: 2012 vol. 61 p. 758 - 762

0018-506X

Due to its complexity, in combination with a lack of scientific reports, fur-chewing became one of the most challenging behavioral problems common to captive chinchillas. In the last years, the hypothesis that fur- chewing is an abnormal repetitive behavior and that stress plays a role in its development and performance has arisen.  Here, we investigated whether a relationship existed between the expression and intensity of fur-chewing behavior, elevated urinary cortisol excretion and anxiety-related behaviors. Specifically, we evaluated the following parameters in behaviorally normal and fur-chewing animals of both sexes: 1) mean concentrations of urinary cortisol metabolites and 2) anxiety-like behavior in an elevated plus-maze test. Urinary cortisol metabolites were higher only in females that expressed the most severe form of the fur-chewing behavior (P¡Ü0.05). Likewise, only fur-chewing females exhibited increased (P¡Ü0.05) anxiety-like behaviors associated with the elevated plus-maze test. Overall, these data provided additional evidence to support the concept that fur-chewing is amanifestation of physiological stress in chinchilla, and that a female sex bias exists in the development of this abnormal behavior.