Male intelligence and sexual prowess
A study found that males, at least among bat species, make an evolutionary trade-off between intelligence and sexual prowess.
In bat species with monogamous females, males had testes (reproductive gland) ranged at 0.11% - 1.4% of their body weight, and brain size was about 2.6% of body weight; but for species where the females had a large number of mates, males had testes ranged at 0.6% - 8.5% of their body weight, and brain size dipped to 1.9% of body weight. Bats invest an enormous amount of energy in testis, and the investment has to come from somewhere.
I don't have similar numbers for other mammals (including humans). Care to guess, anyone ?
Labels: Men
posted by Life Records at 1/26/2006
5 Comments:
ummmm....can't say I've weighed my testicles recently. Wouldn't know the current stat.
The other question, is how does one measure the percentage of weight of a brain, human or bat? I *guess* I could imagine measuring testes (weird), but that's odd nonetheless as well....
....what kind of person wants to hold bat testicles for a job?
.Timothy
9:09 PM
interesting study,i have no idea to guess,tell us,ok?
the twiart incipient
9:41 PM
That's why the geniuses and nerds out there dont get much booty! ;)
This study only helps prove that!
9:16 AM
so if i get this study right, brain size is inversely proportional to testis weight...
now if only theres a weighing station somewhere, we'll be all set!
5:14 PM
great blog! I have no clue since I'm obviously lacking necessary parts for testing
7:20 PM
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