Increase in multiple paternity across the reproductive lifespan in a sperm-storing, hermaphroditic freshwater snail.

Abstract excerpt

Polyandry is a common phenomenon and challenges the traditional view of stronger sexual selection in males than in females. In simultaneous hermaphrodites, the physical proximity of both sex functions was long thought to preclude the operation of sexual selection. Laboratory studies suggest that multiple mating and polyandry in hermaphrodites may actually be common, but data from natural populations are sparse....

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