terça-feira, 17 de maio de 2011

U.S. biologists are fish that live in trees



Biologists have discovered a species of fish can stay months - or even a year - out ofthe water, living in rotting branches and trunks of swamps, reported the Daily Mail. Themangrove killifish-de-(Rivulus marmoratus) alters its biological functions to breathe out of water.
Experts were surprised that this species can stay so long away from their natural habitat. This happens when the water of the mangrove mud pools located in the U.S. state of Florida, Latin America and the Caribbean dry, causing them to seek new placesto hide.
With about 5 cm long, they become lodged in the trunks of trees until the water levelreturns to normal. Meanwhile, are lined up and feeding on small insects. To stay out of water, its gills are altered to retain water and nutrients, while nitrogen is excreted throughthe skin.
According to biologists, this finding, along with the species' ability to procreate withoutthe help of a partner, it might make the mangrove killifish-of-one of the oddest fishknown to man. "They really did not behave normally found in fish, " said Scott Taylor, the American biologist.
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