The effect of energetic and psychosocial stressors on glucocorticoids in mantled howler monkeys (Alouatta palliata)

The proximate causes of variation in glucocorticoids (GCs) of many free-ranging primates are still unclear, and in some cases, the available evidence is contradictory. Such is the case of mantled howler monkeys. In the present study, we tested whether variation in GC levels in this species could be predicted by energetic challenges or by psychosocial […]