Seasonal and altitudinal effects on glucocorticoid metabolites in a wild primate (Theropithecus gelada)

Behavioral ecologists are increasingly adopting sophisticated non-invasive methods for measuring glucocorticoids from “excreta” because samples are easy to collect, animals are left undisturbed, and measures may be more reflective of external events than serum samples. Some of the most common predictors for hormone profiles in wild animals are seasonal changes in ecology and behavior. For […]