Friday, 14 November 2014

Females protect offspring from infanticide by forcing males to compete through sperm

Date:
November 13, 2014

Source:
University of Cambridge

Summary:
New research shows the females of some species will have many mates to ensure unclear paternity, so that males can't resort to killing their rival's offspring for fear of killing their own. This forces males to evolve to compete through sperm quantity, leading to ever-larger testicles. Scientists find that as testis size increases, infanticide disappears.


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