11 Mar '12, 12pm

Scientists Prove That Multiple Species of Sea Cows Once Roamed World’s Waters

Scientists Prove That Multiple Species of Sea Cows Once Roamed World’s Waters

NOAA's National Ocean Service /CC BY-NC-SA 2.0 Sirenians or sea cows include manatees and dugongs. Today only four species of Sirenians exist including the Amazonia Manatee, West Indian Manatee, West African Manatee, and dugongs. Dugongs are a slightly different member of the Dugongidae group that once included Stellar’s Sea Cow, which was hunted to extinction in the 1800’s. Smithsonian scientists have concluded through fossil records that 50 million years ago it was common to find three or more of each species in every region of the world, according to Science Daily . Their research suggests that environmental and food sources have changed since then. These 1,300 pound herbivores have a diet made up entirely of sea grass and scientific research has shown that each species feasted on a different kind of sea grass so as to avoid competition. That’s why they could successful...

Full article: http://www.treehugger.com/endangered-species/scientists-p...

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thedailygreen.com 17 Mar '12, 8pm

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