Stability and change in vocal dialects</tile> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta http-equiv="description" content="Stability and change in vocal dialects"> <meta http-equiv="keywords" content="Stability,and,change,in,vocal,dialects"> </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">09-09-2008</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>Stability and change in vocal dialects</b></font> </td> </tr> <tr> <td width="100%"> </td> </tr> <tr> <td width="100%"> <font face="Verdana, Arial, Helvetica, sans-serif" size="2">San José, Costa Rica (Science Direct): Cultural evolution is an important force in creating and maintaining behavioural variation in some species. Vocal dialects have provided a useful model for the study of cultural evolution and its interactions with genetic evolution. This study examined the acoustic and geographical changes in vocal dialects over an 11-year span in the yellow-naped amazon, Amazona auropalliata, in Costa Rica. <br> <br>For more information, please visit: <br><a href="http://www.sciencedirect.com/science?_ob=GatewayURL&_method=citationSearch&_urlVersion=4&_origin=SDVIALERTHTML&_version=1&_uoikey=B6W9W-4SXS3DG-2&md5=e62afaedf2fa90184806f527b650bbf7 " target="blank">www.sciencedirect.com/science?_ob=GatewayURL&_method=citationSearch&_urlVersion=4&_origin=SDVIALERTHTML&_version=1&_uoikey=B6W9W-4SXS3DG-2&md5=e62afaedf2fa90184806f527b650bbf7 </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