Cuttlefish Biosemiotics and Complex Information


	Cuttlefish Biosemiotics and Complex Information

abailart

1-7-2008 12:41 PM

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cuttlefish, biosemiotics, information

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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://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/341c6f8e-9adc-4160-a1bc-5e70df74e56e/E27BB0CB-65D9-414B-AFF5-CBA6BBC2947D/" 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.newscientist.com/article.ns?id=dn3728" href="http://www.newscientist.com/article.ns?id=dn3728" style="font-size: 11px;">www.newscientist.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.newscientist.com/article.ns?id=dn3728">The remarkable visual vocabulary of cuttlefish, which change the colour of their skin in a flash for communication or camouflage, is being catalogued with the help of a mathematical technique borrowed from signal processing.</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.newscientist.com/article.ns?id=dn3728"><P>30 clear pictures of the patterns. As all were taken at slightly different angles, the researchers used a mesh of reference points to convert each image into a plan view of the animal's back.</p> <P>They then used specialised ICA computer software to study the images. The technique looks for elements within the images that change independently of one another between pictures, and assumes these are the building blocks used to create the patterns</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://www.newscientist.com/article.ns?id=dn3728"> three such elements (see diagram) -</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.newscientist.com/article.ns?id=dn3728"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/www.newscientist.com/img/0C33BF50-6969-485A-B8D1-1F31C383A50C" alt="Colourful communication" /></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.newscientist.com/article.ns?id=dn3728">the technique distinguishes patterns that can be turned up and down like a dimmer switch. But cuttlefish have a second repertoire of all-over body patterns, such as stripes and spots, that are either on or off.</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/E27BB0CB-65D9-414B-AFF5-CBA6BBC2947D/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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