Sexual behavior in old male rhesus monkeys: Influence of familiarity and age of female partners

摘要: Old male rhesus monkeys (Macaca mulatta)whose sexual behavior had declined over a 10-year period were studied. The same ovariectomized females, comparable in age to the males (about 20 years old), served as partners during 10 years. In first experiment old paired with unfamiliar females determine whether changing would reverse decline performance that been observed. also about males, and treated estradiol before pairing, familiar females. Although contacted more often than they there no other differences activity. two groups of did not differ their toward males. low level by both could have result decreased initiative responsiveness associated advanced so second was undertaken test this possibility. different unfamiliar, intact, cycling One group young 4 years). responses same.