The different effects on courtship of volatile compounds from mated and virgin Drosophila females

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Abstract

Virgin Drosophila melanogaster females, which are courted vigorously, emit pheromones which stimulate males to court each other (Tompkinset al., 1980). Females which have recently copulated are courted less vigrously, and volatile compounds produced by mated females stimulate less courtship between males. Analysis of these compounds from fertilized females by gas chromatography and behavioral assays indicates that mated females emit less of the sex attractant made by virgins and may also produce material which inhibits courtship. These changes in pheromone production are initiated after the first few minutes of copulation.

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