Investigating Potential Effects of the Contraceptive Implanon on the Behavior of Free-Ranging Adult Female Barbary Macaques
In recent years, the use of hormonal contraception in captive, free-ranging, and wild mammal populations has increased, but the effects on these nonhuman animals’ behavior and the associated welfare impacts remain poorly understood. This study of free-ranging adult female Barbary macaques (Macaca sylvanus) at Trentham Monkey Forest compared females implanted with the progestin-only contraceptive Implanon […]
Correlates of androgens in wild male Barbary macaques: Testing the challenge hypothesis
Investigating causes and consequences of variation in hormonal expression is a key focus in behavioral ecology. Many studies have explored patterns of secretion of the androgen testosterone in male vertebrates, using the challenge hypothesis (Wingfield, Hegner, Dufty, & Ball, 1990; The American Naturalist, 136(6), 829–846) as a theoretical framework. Rather than the classic association of […]