Males use multiple, redundant cues to detect mating rivals.

Abstract excerpt

Across many species, males exhibit plastic responses when they encounter mating rivals. The ability to tailor responses to the presence of rivals allows males to increase investment in reproduction only when necessary. This is important given that reproduction imposes costs that limit male reproductive capacity, particularly when sperm competition occurs. Fruitfly (Drosophila melanogaster) males exposed to rivals...

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