01778nas a2200169   4500008004100000022001300041245015100054210006900205260001100274300001400285490000800299520118000307100002701487700002201514700002101536856005101557       2008                        eng d  a0928425700aAdaptive radiation in the Congo River: An ecological speciation scenario for African weakly electric fish (Teleostei; Mormyridae; Campylomormyrus)0 aAdaptive radiation in the Congo River An ecological speciation s  c7/2008  a340 - 3460 v1023 a<p>he ultimate aim of this study is to better understand the diversification of African weakly electric fish in the Congo River. Based on a robust phylogenetic hypothesis we examined the radiation within the mor- myrid genus Campylomormyrus. Morphological traits relevant for the divergence between the identified species were detected. Among them, the variation in the shape of the trunk-like elongated snout sug- gested the presence of different trophic specializations. Furthermore, the chosen model taxon, the genus Campylomormyrus, exhibits a wide diversity of electric organ discharge (EOD) waveforms. A comparison of EOD waveform types and phylogenetic relationships showed major differences in EOD between closely related species. This indicates that the EOD might function as a reproductive isolation mechanism. In con- clusion, we provide a plausible scenario of an adaptive radiation triggered by sexual selection and assor- tative mating based on EOD characteristics, but caused by a divergent selection on the feeding apparatus. These findings point towards an adaptive radiation of at least some Campylomormyrus species occurring in the Lower Congo River.</p>
1 aFeulner, Philine, G.D.1 aKirschbaum, Frank1 aTiedemann, Ralph  uhttps://mormyrids.efishgenomics.com/fr/node/32