Arms Race-Between Prey and Predator

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	Arms Race-Between Prey and Predator

lakotahope

7-17-2009 6:34 AM

47 views

tags:

sonar, jamming, bats and tiger moths

lakotahope says:

Yeah, this has been going on long before modern man arrived to copy such things as jamming enemy signals.....

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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/1a52e853-fdd7-4c0a-9aa8-d91908f7d405/8C66A20B-3850-40B1-9BAD-489FFEE6F729/" 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.msnbc.msn.com/id/31950404/ns/technology_and_science-science/" href="http://www.msnbc.msn.com/id/31950404/ns/technology_and_science-science/" style="font-size: 11px;">www.msnbc.msn.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.msnbc.msn.com/id/31950404/ns/technology_and_science-science/"><P class="textBodyBlack"><SPAN id="byLine"></SPAN>Tiger moths can thwart attacks from bats by effectively jamming the bats' sonar, doing so by emitting sudden bursts of ultrasound, scientists now find. </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.msnbc.msn.com/id/31950404/ns/technology_and_science-science/"><P class="textBodyBlack"><SPAN id="byLine"></SPAN>"This reveals that even a small moth can defeat the most sophisticated acoustic predator known," said researcher Aaron Corcoran, a biologist at Wake Forest University in Winston-Salem, N.C. "It's a fantastic example of an escalating arms race between predator and prey, with each trying to constantly one-up the other." </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.msnbc.msn.com/id/31950404/ns/technology_and_science-science/"><P class="textBodyBlack"><SPAN id="byLine"></SPAN>"These moths can make an incredible amount of sound, 450 clicks in a tenth of a second," Corcoran explained. "That's essential, because a bat's entire attack sequence can last just one second, maybe two seconds on the long end, and so the moths have to be quick, listen to the bat echolocation calls and then figure out the right time to make the right sounds to jam them. It's an extraordinarily fast, dynamic response." </P></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/8C66A20B-3850-40B1-9BAD-489FFEE6F729/blog/" title="blog or email this clip"><img src="http://content7.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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