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Bear23
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 Posted: Thu Aug 21, 2008 3:19 am Post subject: Lungless Frogs |
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This is cool: http://www.ebiologynews.com/4247.html
Biologists find first lungless frog
2008/04/08
April 8 : Biologists have found the first recorded species of frog that breathes without lungs in a clear, cold-water stream on the island of Borneo in Indonesia.
According to a report in National Geographic News, the frog, named “Barbourula kalimantanensis”, gets all its oxygen through its skin.
“Nobody knew about the lunglessness before we accidentally discovered it doing routine dissections,” said David Bickford, a biologist at the National University of Singapore.
Though two specimens of the frog were discovered in 1978 by Djoko Iskandar at the Bandung Institute of Technology in Indonesia, they were not dissected as scientists deemed them as valuable.
But Bickford immediately partially dissected several frogs when he found the species on a recent expedition to Borneo.
According to Bickford and colleagues, tetrapods, or four-limbed creatures, that develop without lungs are rare evolutionary events.
The trait in amphibians is likely an adaptation to life between water and land and their ability to respire through the skin, they added.
The researchers suggest lunglessness in B. kalimantanensis may be an adaptation to the higher oxygen content in fast-flowing, cold water.
“Cold water can hold more dissolved oxygen than warm water,” Bickford explained.
The frog also has a low metabolic rate, which means it needs less oxygen.
What’s more, the species is severely flat compared to other frogs, which increases the surface area of the skin.
“Along with the fact that having lungs makes you more likely to be swept away in a fast-flowing stream—because you would float—this is a very strong context for the evolution of loss of lungs,” said Bickford.
But, biologists are unsure why a few species have entirely gotten rid of the organs.
“This species is so rare that we know next to nothing concerning its biology. But, it is aquatic and lives in cold streams and doubtless has low basal metabolic rate,” said David Wake, a biologist and expert in amphibian evolution at the University of California, Berkeley.
“Thus, loss of lungs as an adaptation to the cold, fast-flowing water seems like a rational hypothesis to me,” he said. (ANI) |
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Proverbs 11:2- When pride cometh, then cometh shame: but with the lowly is wisdom.
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Saturos
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| Posted: Thu Aug 21, 2008 8:11 am Post subject: |
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| This was really interesting. |
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Bear23
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| Posted: Thu Aug 21, 2008 12:17 pm Post subject: |
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| Haha. I thought so too. another reason i believe in evolution. |
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_________________
Proverbs 18:24- A man that hath friends must show himself friendly: and there is a friend that sticks closer than a brother.
Proverbs 11:2- When pride cometh, then cometh shame: but with the lowly is wisdom.
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Saturos
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| Posted: Thu Aug 21, 2008 7:45 pm Post subject: |
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I also believe in Evolution but the thing I want to know is the origin of it although I have a pretty good idea on what it is.
Anyway I wonder how many more animals with rare biological facts there is ot there  |
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Bear23
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| Posted: Fri Aug 22, 2008 5:21 am Post subject: |
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| could be hundreds or even thousands. there are still fish we have not discovered because of how deep in the ocean they live. and there are probably more types of animals we havent studied because they are so rare. |
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Proverbs 18:24- A man that hath friends must show himself friendly: and there is a friend that sticks closer than a brother.
Proverbs 11:2- When pride cometh, then cometh shame: but with the lowly is wisdom.
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martiandrifter01
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| Posted: Sun Aug 24, 2008 5:07 pm Post subject: |
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Not funny, Saturos. We all know that life, evolution and the Universe began with you. Stand and be worshipped.
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Just for fun, and maybe a chance to learn a little solar system astronomy...
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Saturos
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| Posted: Sun Aug 24, 2008 7:07 pm Post subject: |
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| Quote: |
| Not funny, Saturos. We all know that life, evolution and the Universe began with you. Stand and be worshipped. |
Damn you revealed the greatest of the greatest mysteries...
Now the only thing that´s left...is the day of your doom...
Doomsday : 2013-11-13-21:45
Enjoy...  |
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martiandrifter01
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| Posted: Fri Sep 12, 2008 3:21 pm Post subject: |
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Gotta ask. Why November 13, 2013 at 9:45 post meridian? I mean, it's a free forum and all, are you calculating with the Youran Calendar instead of Myan?
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Saturos
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| Posted: Sat Sep 13, 2008 12:03 am Post subject: |
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Maybe but I won´t tell  |
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