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Tiger sharks cannabalize each other in the womb

Posted: Wed May 01, 2013 7:32 am
by Parrotpaul
This doesn't have a terrific impact on anyone's life...unless they have tangled with a successful adult Tiger shark. The evolutionary process among Tiger sharks and the womb battles of their fetuses are rather fascinating and provocative when you think about what happens inside those two uteri female Tiger sharks possess. WP

“For most species, we think of sexual selection as ending when males fertilize eggs, because once the male’s fertilized eggs he’s won, there will be some genetic representation in the next generation,” said Stony Brook University marine biology professor Demian Chapman, lead author of the study published online Wednesday in Biology Letters. “This is demonstrating that embryonic cannibalism is actually whittling down the number of males producing offspring.”

It’s still unclear whether the evolutionary strategy works because the most-aggressive fathers get their offspring growing in utero before others, thus giving them a developmental advantage in the cannibalistic battles to come, or if they produce offspring that gestate more quickly.

Re: Tiger sharks cannabalize each other in the womb

Posted: Thu May 02, 2013 9:01 pm
by Fiftydown
So if one male shark eats another male shark, does that make him gay?

If one male shark eats another male shark in San Jose, does that make him a hockey player?

Re: Tiger sharks cannabalize each other in the womb

Posted: Fri May 03, 2013 10:04 am
by Red
That is some funny stuff.