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Female guppy fish choose sperm from preferred males

Female guppy fish choose sperm from preferred males

guppy fish

Full article issued by The University of Western Australia

ARC-supported researchers from The University of Western Australia have found that female guppy fish are highly selective when it comes to choosing the father of their babies.

In a study published in the Proceedings of the Royal Society London B, ARC Discovery Early Career Researcher Award (DECRA) recipient, Dr Clelia Gasparini, and Associate Professor Jon Evans, discovered that while female guppy fish mate with several males, like many other species, they also exercise great control over which males will ultimately father their offspring.

The researchers were able to demonstrate that female guppy fish receive cues from males that they use to decide which male will fertilise their eggs. The way in which females sort the ‘best’ sperm from the ‘worst’ sperm was not the focus of the study, but the researchers suspect that females somehow control how many sperm are retained for fertilisation.

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