News tagged with sex ratios

Manipulative mothers subdue show-off sons

The gaudy plumage and acrobatic displays of birds of paradise are a striking example of sexual selection, Charles Darwin's second great theory of evolution. But new research shows that this powerful process may collapse when ...

dateSep 12, 2011 in Evolution
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Competing for a mate can shorten lifespan

"Love stinks!" the J. Geils band told the world in 1980, and while you can certainly argue whether or not this tender and ineffable spirit of affection has a downside, working hard to find it does. It may even shorten your ...

dateAug 09, 2010 in Other
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Omega-6 key to female lamb conception

New research has shown farmers may be able to determine the sex ratios of lambs by raising omega-6 fatty acids in the diets of breeding stock, a discovery that could have major benefits for industry.

dateAug 15, 2013 in Plants & Animals
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A boy for every girl? Not even close

In a perfect world, for every boy there would of course be a girl, but a new study shows that actual sex ratios can sometimes sway very far from that ideal. In fact, the male-to-female ratio of one tropical butterfly has ...

dateSep 10, 2009 in Plants & Animals
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