Abstract
IT is generally accepted that the sexual activity of the male rat is subjected to a diurnal variation. Thus, Beach and Levinson1 and Larsson2 have found that male rats in the presence of females, are sexually more active under night conditions. In 1961 Orbach3 demonstrated that the isolated male rat spontaneously ejaculates. The ejaculates yielded appear as plugs of coagulated semen which can be collected provided the animals are prevented from grooming the penis orally. In the course of an investigation I obtained figures which would be suitable for a study of the diurnal variation in such spontaneous ejaculations of the male albino rat.
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References
Beach, F. A., and Levinson, G., Proc. Soc. Exp. Biol. and Med., 72, 78 (1949).
Larsson, K., Acta Psych. Gothoburg., 1, 1 (1956).
Orbach, J., Science, 134, 1072 (1961).
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KIHLSTRÖM, J. Diurnal Variation in the Spontaneous Ejaculations of the Male Albino Rat. Nature 209, 513–514 (1966). https://doi.org/10.1038/209513a0
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DOI: https://doi.org/10.1038/209513a0
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