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 ...

Sep 12, 2011
5 / 5 (2) 0 | with audio podcast

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 ...

Aug 09, 2010
3.6 / 5 (5) 2 | with audio podcast

Rainfall linked to skewed sex ratios

An increased proportion of male African buffalo are born during the rainy season. Researchers writing in the open access journal BMC Evolutionary Biology collected data from over 200 calves and 3000 foetuses, finding that r ...

Apr 22, 2010
not rated yet 0

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 ...

Sep 10, 2009
2.3 / 5 (3) 0