Dead, live guppies vie for paternity
Females can use sperm months after mates go belly up
Among wild guppies in Trinidad streams, a female (left) can store sperm from a male (right). In a new experiment, female Trinidadian guppies lived much longer than males and still used sperm left over from the generation of the grandfathers of current males.
Paul Bentzen/Dalhousie
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