Chinese Crabs Rapidly Invading U.K., Scientists Warn


	Chinese Crabs Rapidly Invading U.K., Scientists Warn

tabsey

1-31-2008 5:32 AM

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tags:

nature

tabsey says:

Originating from China, the first mitten crab—so called because its claws are covered in soft bristles—was reported in London's River Thames in 1935.

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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/85df191f-199a-4a25-b0f6-29a16e068a5c/3D19A025-B0D0-478D-9F81-17C468C3E866/" 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://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html" href="http://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html" style="font-size: 11px;">news.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/news.nationalgeographic.com/img/B14E57C0-0FD6-436B-9C9C-2FC62755998B" alt="Photo: Chinese mitten crab" /></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://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html"><P class="intro">
A furry-clawed crustacean native to China is quickly scuttling its way
across Britain, according to a new study.
</P></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://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html"><P>
The freshwater crab could cause major environmental problems unless its numbers are brought under control, researchers warn.
								</P></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://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html"><P>
The study shows the Chinese mitten crab has begun to invade Britain's waterways, after having been confined to a handful of estuaries since it first appeared in the United Kingdom (<A href="http://www.nationalgeographic.com/xpeditions/atlas/index.html?Parent=europe&Rootmap=grbrit&Mode=d&SubMode=w">map</A>) some 70 years ago. 
</P></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://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html"><P>
Researchers from the University of Newcastle in northeast England say the crab, which can walk for miles over land, has advanced rapidly from the Thames and Medway estuaries in southeast England to waterways along the country's eastern and southern coasts. 
</P></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://news.nationalgeographic.com/news/2006/02/0215_060215_chinese_crab.html"><P>
The team found that by 1999 the mitten crab was colonizing 278 miles (448 kilometers) of coastline a year—nearly six times the annual rate of spread since the 1970s. Rivers are being invaded three times faster than before.
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