Tiger sharks cannabalize each other in the womb

Space, the environment, new discoveries and new uses for old ones
Post Reply
User avatar
Posts: 33551
Joined: Sun Oct 15, 2006 2:14 pm
Has thanked: 1 time

Tiger sharks cannabalize each other in the womb

Post by Parrotpaul » Wed May 01, 2013 7:32 am

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.
"I think I may say that of all the men we meet with, nine parts of ten are what they are, good or evil, useful or not, by their education." John Locke

Posts: 174
Joined: Sun Apr 07, 2013 7:27 pm

Re: Tiger sharks cannabalize each other in the womb

Post by Fiftydown » Thu May 02, 2013 9:01 pm

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?

Posts: 17717
Joined: Wed Nov 28, 2007 4:33 pm

Re: Tiger sharks cannabalize each other in the womb

Post by Red » Fri May 03, 2013 10:04 am

That is some funny stuff.
Liberalism is like an out-of-control 5 year old at McDonalds. All the talking to and admonishment won't make a difference. They have no concept of right or wrong, they are nothing more than narcissists.

Post Reply