J Med Primatol
December 2013
Background: The studies on fecal steroid metabolites published with free-living primates are limited mainly by the difficulty in obtaining samples.
Methods: A radioimmunoassay was used to measure the fecal steroid concentrations in Alouatta belzebul in the National Forest of Tapirape-Aquiri in Brazil.
Results And Conclusions: Androgens were significantly higher for the adult males from the Area of Influence (AI-I group) when compared to those from the Control Area (CA group) (P < 0.