<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Greisman, L.</style></author><author><style face="normal" font="default" size="100%">Moller, P.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The anal fin complex in a weakly discharging electric fish, Gnathonemus petersii(Mormyridae)</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Fish Biology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Journal of Fish Biology</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2005</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-01-2005</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.blackwell-synergy.com/toc/jfb/66/1</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">66</style></volume><pages><style face="normal" font="default" size="100%">266 - 275</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;An examination of the permanent bony structures of the anal fin complex in the mormyrid fish, &lt;em&gt;Gnathonemus petersii&lt;/em&gt;, revealed two new structural sexual dimorphisms: longer proximal pterygiophores and wider anal fin rays in males than in females. Both structures are thought to facilitate the male&amp;rsquo;s courtship-associated anal fin reflex. Adult male mormyrid fishes are characterized by a dorsally directed indentation of the posterior body wall (anal fin indentation). The expression of this indentation in males, presumably driven by anal fin musculature, was correlated with the fish&amp;rsquo;s gonadal state: large indentations were associated with high gonado-somatic indices and small indentations with low indices.&lt;/p&gt;
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