Animal communication: Complex call production in the túngara frog</tile> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta http-equiv="description" content="Animal communication: Complex call production in the túngara frog"> <meta http-equiv="keywords" content="Animal,communication,Complex,call,production,in,the,túngara,frog"> </head> <body> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="10" height="39"> </td> <td width="99%" height="39"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="16%"><a href="http://inttranews.inttra.net"><img src="http://inttranews.inttra.net/images/inttranews_grey_2.jpg" width="192" height="37" border="0"></a></td> <td width="50%" valign="middle"> <p><font face="Arial, Helvetica, sans-serif" size="2"><b><font color="#CCCCCC" face="Verdana, Arial, Helvetica, sans-serif" size="1">KNOW.<br> HOW.</font></b></font> </p> </td> <td width="34%" align="right" valign="top"><font face="Verdana, Arial, Helvetica, sans-serif" size="1" color="#666666">05-05-2006</font></td> </tr> </table> </td> </tr> <tr> <td width="10"> </td> <td width="99%" > </td> </tr> <tr> <td width="10"> </td> <td width="99%" > <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><font face="Verdana, Arial, Helvetica, sans-serif" size="2"> <b>Animal communication: Complex call production in the túngara frog</b></font> </td> </tr> <tr> <td width="100%"> </td> </tr> <tr> <td width="100%"> <img src="http://inttranews.inttra.net/img_news/img_2YiJBQlCfuOygIh3VV2K_0.jpg" align="left" vspace="5" hspace="5" ><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Texas, USA (Nature): Animals' sound-producing organs often act as an integrated whole — particular vocal structure are not directly associated with the creation of discrete syllables. [This article shows] that the 'chuck' of the 'whine-chuck' mating call of the túngara frog, Physalaemus pustulosus, is caused by a fibrous mass attached to the vocal folds; the chuck is eliminated by removal of this structure, although the frog still tries to produce the sound. Sexual selection affects the acoustic complexity of the frog's call, so evolution may have shaped this unusual vocalization, which is akin to the two-voiced song of songbirds. <br> <br>For more information, please visit: <br><a href="http://info.nature.com/cgi-bin24/DM/y/hX4W0Mc2fA0Ch0z6L0Es " target="blank">info.nature.com/cgi-bin24/DM/y/hX4W0Mc2fA0Ch0z6L0Es </a> <br></font></td> </tr> </table> </td></tr> </table> <script type="text/javascript"></script> <script type="text/javascript" src="<http://pagead2.googlesyndication.com/pagead/show