01606nas a2200145   4500008004100000022001400041245017700055210006900232260001200301300001400313490000700327520105700334100001801391856005101409       2013                        eng d  a1029-036200aDifferentiation in morphology and electrical signalling in four species of para- and sympatric <i>Marcusenius</i> (Teleostei: Mormyridae) from Côte d’Ivoire, West Africa0 aDifferentiation in morphology and electrical signalling in four   c03/2013  a105 - 1330 v463 a<p>Marcusenius Gill, 1862 species were sampled from the Bandama River and the Comoé River in Côte d&rsquo;Ivoire, West Africa. Marcusenius gracilis sp. nov. was differentiated from M. senegalensis (Steindachner, 1870), Marcusenius ussheri (Günther, 1867) and M. furcidens (Pellegrin, 1920) in electric organ discharges (EOD), and morphologically from all other West African congeners. Principal component analysis showed significant morphological differentiation among the four Ivorian species. Principal component 1 was loaded most strongly by characters affecting swimming power and manoeuvrability. The morphologically most similar pair, M. furcidens and M. gracilis sp. nov., are distinguished by their EOD waveforms and a sexual dimorphism in the anal fin base in the latter not present in the former. M. ussheri is distinguished by a sexual dimorphism in its EOD waveform not observed in the other three species. This system is an opportunity to study how far the fine-tuning of char- acter displacement among syntopic species can go.</p>
1 aKramer, Bernd  uhttps://mormyrids.efishgenomics.com/en/node/13