Effect of devocalization of the male on mating behavior in rats.

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Abstract
The effects of devocalization of male rats on the copulatory behavior of male and female rats were investigated. No difference in any measure of masculine copulatory performance were found between vocalizing and muted males; estrous females mated with vocalizing males exhibited more frequent darting behavior than females mated with muted males. Females paired with vocalizing males in a tether apparatus exhibited more patterns of proceptive behavior per unit of time than did females paired with devocalized males, although the temporal distribution of this behavior, with respect to mounts by males, was unchanged. Conversely, patterns of receptive behavior were unaffected by devocalization of the male.