Female reproductive cycles and the sexual behavior of moor macaques (Macaca maurus) in their natural habitat,South Sulawesi,Indonesia

The female reproductive cycles and sexual behavior of moor macaques (Macaca maurus) were studied in their natural habitat. Female moor macaques showed repeated perineal swelling. The average cycle length was 36.2 days and the mean duration of swelling was 11.9 days. The estimated duration of gestation in two observed cases was 175 and 176 days, respectively. Females did not exhibit post-conception sexual swelling. Males appeared to ejaculate in multi-mounts. Serial mounting by the alpha male was concentrated on swelling females, while second- and third-ranking males sometimes mounted non-swelling females in series.