High levels of ozone destroy the chemical mating signal of the insects and may thus contribute to global insect decline. Insect sexual communication relies to a significant extent on pheromones, chemical attractants that specifically allow males and females of a species to mate. Sex pheromones ar
Copulation attempt of two Drosophila males in ozone-enriched air. Credit: Benjamin Fabian, Max Planck Institute for Chemical Ecology
Insect sexual communication relies to a significant extent on pheromones, chemical attractants that specifically allow males and females of ato mate. Sex pheromones are distinctive to males and females of a species. Even the smallest differences, such as those observed in the formation of new species, ensure that mating no longer takes place, because males and females only find each other through the unmistakable odor of their conspecifics.
Courting chain of four male Drosophila flies. Male flies exhibited unusual courting behavior towards other males that had been exposed to increased ozone levels as they are nowadays often found in cities in the summer. Credit: Benjamin Fabian, Max Planck Institute for Chemical Ecology, the scientists first developed an ozone exposure system for flies that could mimic ozone levels in the air as they are nowadays often measured in the cities in the summer.
In ozone-enriched air, male Drosophila flies show unusual courting behavior towards other males. Credit: Nanji Jiang, Max Planck Institute for Chemical Ecology
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