Re: Onset of Puberty Determined by Evolution

"APOCALYPSE" <reignorshyne@xxxxxxxxxxx> wrote in
news:1133410475.475741.177960@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

> I read somewhere that female puberty is related to viability for
> pregnancy.
>
> A girl who comes of age too thin will have a body without enough fatty
> insulation and protection for a growing baby. Consequently, girls who
> grow up thin will have delayed onset of their first period because the
> body won't have the necessary mass to produce the hormone that triggers
> the hormone that triggers the hormone for having a period.

At the same time, if life expectancy is low, then even poor probability of
success NOW beats zero probability of surviving to an age with a better
probability of successful reproduction.

See "reproductive value"; a nice page with pretty pictures and a clear
explanation is available here:

http://uts.cc.utexas.edu/~varanus/demography.html

Disclosure: Eric was my major prof for a time until we had a falling out
about why his stomach-contents analysis work was hopelessly flawed (I can't
understand why he took that personally! :-), but he's still an extremely
bright guy.

-JAH

.

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