2021. Effects of Lupron and surgical castration on fecal androgen metabolite concentrations and intermale aggression in capybaras (Hydrochoerus hydrochaeris). Zoo biology, 135–141. 2020. Effects of a recurring late-night event on the behavior and welfare of a population of zoo-housed gorillas. Zoo biology, 217–229. 2017. Relationships between steroid hormones in hair and social behaviour in ring-tailed lemurs (Lemur catta). Primates, 199–209.