Scientists have confirmed the second case of a "virgin birth" in a shark. In a study reported Friday in the Journal of Fish Biology, scientists said DNA testing proved that a pup carried by a female Atlantic blacktip shark in the Virginia Aquarium & Marine Science Center contained no genetic material from a male.
The first documented case of asexual reproduction, or parthenogenesis, among sharks involved a pup born to a hammerhead at an Omaha, Neb., zoo.
"This first case was no fluke," Demian Chapman, a shark scientist and lead author of the second study, said in a statement. "It is quite possible that this is something female sharks of many species can do on occasion."
It's a sensible fallback reproduction strategy for an open water predator, whose population density is necessarily very, very low. It wouldn't surprise me if it's quite common. There are plenty of reptiles and amphibians who reproduce through parthenogenesis.
0 Replies
Blickers
1
Reply
Wed 22 Oct, 2008 10:42 pm
@chai2,
When you think about it, Nebraska is a strange place for a shark to be from.
Stumble It!
Tweet This
Bookmark on Delicious
Share on Facebook
Share on MySpace