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WATER WORLD
Globe's giant squids may be single species
by Staff Writers
Copenhagen, Denmark (UPI) Mar 19, 2013


disclaimer: image is for illustration purposes only

A finding of exceptionally low genetic diversity suggests all giant squid worldwide are members of a single species, Danish researchers say.

A study published in the Proceedings of the Royal Society B reported on DNA studies of the globe-trotting giant squid, which can grow as big as 43 feet long.

"These observations are consistent with the hypotheses that there is only one global species of giant squid, Architeuthis dux," researcher Inger Winkelmann and colleagues wrote, suggesting the squid could have one of the largest known ranges of any species.

Winkelmann of the University of Copenhagen's Natural History Museum of Denmark and colleagues studied DNA in tissue samples from 43 giant squid, most found stranded on beaches or discovered floating dead on the water's surface, Discovery.com reported Tuesday.

The samples came from squid recovered in waters off California, Florida, Spain, Japan and New Zealand, and all showed the same genomic makeup.

If there is in fact just one giant squid species it is evidence adults must be capable of traveling huge distances, the researchers said.

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WATER WORLD
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Sydney (AFP) March 21, 2013
Great white sharks, the world's largest predatory fish, eat three to four times more food than previously thought, an Australian study shows. US research from the 1980s estimated a 30 kilogram (66 lbs) meal of mammal blubber could sustain a one-tonne shark for more than six weeks. That perpetuated assumptions that large sharks could survive long periods without eating. However, a Uni ... read more


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