lungless frog discovered


	lungless frog discovered

sylviadafox

4-15-2008 11:10 PM

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/e191da45-dd91-4125-b4db-d7cbc0d67cd2/BCF71BF1-92EB-4077-8768-2BCE4D748B11/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper" href="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper" style="font-size: 11px;">www.nytimes.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/www.nytimes.com/img/72FBA85A-6E88-4654-B2DA-34004C2E9620" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper">Scientists working in the Indonesian part of Borneo have rediscovered a rare species of aquatic frog, known only from two specimens described 30 years ago.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper"> That’s a nice achievement, but what makes it extraordinary is what David Bickford of the National University of Singapore and colleagues discovered when they dissected some of the nine new specimens of Barbourula kalimantanensis: the frog has no lungs.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper"> No one is certain why lunglessness has evolved, but a popular theory suggests it does so in response to an extreme environment — cold, swift-flowing streams. Such waterways would have a lot of dissolved oxygen to absorb (and the frog, being cold-blooded, has a fairly low metabolism anyway). Lack of lungs would also give the frog negative buoyancy, making it easier to sink and stay put, rather than being swept away, in fast-moving water.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nytimes.com/2008/04/15/science/15oblung.html?ref=todayspaper">B. kalimantanensis, which is about two inches long and noticeably flat, has no airway opening in its throat, and only a membrane lining its thoracic cavi</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/BCF71BF1-92EB-4077-8768-2BCE4D748B11/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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