Abstract
ABSTRACT. Both sexes of the speckled bush cricket, Leptophyes punctatissima (Bosc) (Tettigoniidae) produce sound by stridulation. The sound is used in courtship. The male sings for periods throughout the day and night, and there is a peak of activity in the early afternoon. The female sings only in response to a male chirp. The male increases his rate of singing if he receives replies from a female. After 3 days isolation from male song, the female replies most readily to male song mimics of short duration (10 ms) whose carrier frequency is 30 or 45 kHz. Females that have been isolated from male song for 10 days respond less readily than those isolated for 3 days. The short duration of the songs of both sexes reduces their value as locating signals. This disadvantage may be outweighed by the fact that a short signal reduces the chance of a predator detecting the singer by acoustic or visual cues.
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