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Demonstration of sex pheromones in the predaceous diving beetle Rhantus suturalis (MacLeay 1825) (Dytiscidae)

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Abstract

Sex pheromones are used by a wide variety of species in terrestrial ecosystems. Much less is known about these pheromones in aquatic systems e.g., for diving beetles. To test the use of pheromones and visual signals for mate finding by the diving beetle Rhantus suturalis (MacLeay 1825), behavioral experiments were performed using three different types of vessels containing conspecific. In experiments with non-permeable glass flasks, which did not allow the diffusion of chemical substances, males and females did not stimulate any reaction by conspecific of either sex. In experiments with opaque but water permeable vessels, and in experiments with vessels made of finely woven steel, which allowed the perception of chemical as well as optical cues, male diving beetles were significantly attracted to females. Females were attracted to other females only in the last experiment, when simultaneously perceiving chemical and optical cues. These results indicate that R. suturalis females release sex pheromones to attract mating partners, which is the first experimental demonstration of pheromones in the Dytiscidae.

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Acknowledgments

We would like to thank Bernhard Herbst and Sebastian Bertsch for the help in catching beetles in the field and Karen Voss for language polishing. The submitted version of the manuscript was improved, thanks to the advice of two unknown referees.

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Correspondence to Johannes L. M. Steidle.

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Herbst, C., Baier, B., Tolasch, T. et al. Demonstration of sex pheromones in the predaceous diving beetle Rhantus suturalis (MacLeay 1825) (Dytiscidae). Chemoecology 21, 19–23 (2011). https://doi.org/10.1007/s00049-010-0061-3

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  • DOI: https://doi.org/10.1007/s00049-010-0061-3

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