Letter | Published:

Sexual Performance Index of Male Rhesus Monkeys

Naturevolume 214page425 (1967) | Download Citation



ALTHOUGH information about ejaculation in infra-primate mammals is available1–4, quantitative data are lacking for most primates. Field studies5–6 have provided the basic information on the copulatory sequences of behaviour of adult rhesus monkeys; findings which have recently been confirmed in the laboratory7. The present investigation is concerned with a particular aspect of sexual behaviour: namely, the relation between mounting and thrusting activity on one hand and the timing of ejaculation on the other.

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  1. 1

    Beach, F. A., Nebraska Symposium on Motivation, 1 (Univ. Nebraska Press, 1956).

  2. 2

    Bermant, G., J. Comp. Physiol. Psychol., 57, 398 (1964).

  3. 3

    Larsson, K., Conditioning and Sexual Behaviour in the Male Albino Rat (Almqvist and Wiksell, Stockholm, 1956).

  4. 4

    Young, W. C., and Grunt, J. A., J. Comp. Physiol. Psychol., 44, 492 (1951).

  5. 5

    Altmann, S. A., Ann. N.Y. Acad. Sci., 102, 338 (1962).

  6. 6

    Carpenter, C. R., J. Comp. Psychol., 33, 113 (1942).

  7. 7

    Michael, R. P., Proc. Roy. Soc. Med., 58, 595 (1965).

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  1. Primate Research Centre, Bethlem Royal Hospital, Monks Orchard, Beckenham, Kent

    •  & G. SAAYMAN


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