?

Log in

No account? Create an account

Journal of No. 118


November 20th, 2012

Investing with your tits @ 03:01 pm


SciAm mentions an interesting study on breast milk. Economically stable mothers produce richer (fattier) milk for sons than daughters. Poor mothers produce richer milk for daughters.

Apparently, this jibes with evolutionary predictions on parental investment: "The Trivers-Willard hypothesis states that natural selection favors parental investment in daughters when times are hard and in sons when times are easy. ... Well-off parents who can afford to invest in sons should do so because their gamble could give them many grandchildren. Conversely, poor parents should not heavily invest in sons because it is unlikely to pay off -- their offspring start at the bottom of the socioeconomic ladder. For those families, daughers are a safer bet becase as long as they survive to adulthood, they are likely to produce young."
 
Share  |  |

Comments

 
[User Picture Icon]
From:notjenschiz
Date:November 20th, 2012 09:30 pm (UTC)

unwed mothers

(Link)
Seems like (poor) unwed mothers likely to produce more (poor) unwed mothers...

Journal of No. 118