<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/5fea4eef-6490-4924-9ae8-efae3664784d/6CC66938-B94A-47CD-A039-0C18A0E3B053/" 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://electrochem.cwru.edu/ed/encycl/art-f01-fish.htm" href="http://electrochem.cwru.edu/ed/encycl/art-f01-fish.htm" style="font-size: 11px;">electrochem.cwru.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://electrochem.cwru.edu/ed/encycl/art-f01-fish.htm"> This article provides an abbreviated account of an unfamiliar sensory system well developed in certain families of fishes and present in simpler form in a few amphibians and mammals. Some species use only the passive form – electroreceptors filter and map the <A href="http://electrochem.cwru.edu/ed/encycl/../dict.htm#e138"> electric fields</A> of extraneous origin, whether biological or nonliving, around or near the animal. Where the system is developed in an active form, it involves an electric organ that generates pulses of <A href="http://electrochem.cwru.edu/ed/encycl/../dict.htm#c14"> current</A> under central control, and an array of specialized sense organs that detect the animal�s own field and central (brain) circuits that analyze these signals with respect to its spatial and temporal structure. In addition to discussing each of these topics we will mention briefly the behavioral uses (such as communication, feeding, and electrolocation, among others), the developmental history, evolution, and special aspects.</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://electrochem.cwru.edu/ed/encycl/art-f01-fish.htm"> ELECTRIC FISH, ELECTRIC ORGAN DISCHARGES, AND ELECTRORECEPTION</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/6CC66938-B94A-47CD-A039-0C18A0E3B053/blog/" title="blog or email this clip"><img src="http://content8.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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