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A comment on As Japan's population shrinks, bears and boars roam among schools and shrines. Parent comment

Re:As Japan's population shrinks, bears and boars roam among... by makomk on Tuesday July 12, 2016 @09:22AM (#12078732)
There's something called Fisher's principle that explains why the sex ratio of most species is 50:50. In short, if less than 50% of humans are men, then men must have more children on average than women and it becomes reproductively advantageous to have more make kids in order to take advantage of it.
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Re:As Japan's population shrinks, bears and boars roam among... by JoeAltmaier on Tuesday July 12, 2016 @09:32AM (#12078786)
Still, in many animal populations the ratio 1:1 doesn't hold. Something else is going on then.
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Re:As Japan's population shrinks, bears and boars roam among... by internaut on Friday July 15, 2016 @03:17PM (#12103202)
I think it's not quite 1:1 in humans, the males have a slight lead.

http://www.scientificamerican.com/article/is-a-pregnant-woma...

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