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Disruptive sexual selection on male body size in the polyphenic black scavenger fly Sepsis thoracica

Author

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  • Juan Pablo Busso
  • Wolf U Blanckenhorn

Abstract

Males of the fly Sepsis thoracica, which breeds in livestock dung, are either small and black or large and amber. In trying to understand the evolution of this rare phenomenon, we found that large amber males were more successful in obtaining mates, while small black males had greater mating success than males of intermediate size and color. This was mediated by different alternative aggressive mating behaviors that mainly differed in extent.

Suggested Citation

  • Juan Pablo Busso & Wolf U Blanckenhorn, 2018. "Disruptive sexual selection on male body size in the polyphenic black scavenger fly Sepsis thoracica," Behavioral Ecology, International Society for Behavioral Ecology, vol. 29(3), pages 769-777.
    • Handle: RePEc:oup:beheco:v:29:y:2018:i:3:p:769-777.
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