Abstract
Display behaviour was studied in a semi-natural troop of 127 Japanese macaques ( Macaca fuscata) confined to a 8058-m 2 corral. Five types of display were described: shaking, kicking, leaping, tossing and swinging. Their frequency of occurrence was recorded during an annual breeding season. Individual male displays were significantly correlated with ejaculation rank, and more males displayed much more frequently than females. The significant increase in frequency of male (but not female) displays during the mating season did not correlate with individual dominance rank or attack frequency. We postulate that in this troop of Japanese macaques these displays serve as a mechanism of sexual selection and influence the females' choice of males.
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