Abstract
The sexual behavior and female reproductive cycles of a captive group of stumptail macaques (Macaca arctoides)were monitored during a 12-month period. The data, consisting of 303 ad libitummounts and copulations and 125 hr of focal-female testing, were analyzed by their frequency of occurrence during the three hormonal phases of the female menstrual cycle. Regularly cycling females exhibited statistically higher frequencies of all sexual behaviors compared to the amenorrheal controls. Contrary to previous reports which indicate no variation in sexual behavior throughout the reproductive cycle in this species, our data show marked increases in copulations during the periovulatory phase. Male dominance rank is associated with sexual behavior only at midcycle.
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