Kramer, Bernd (2013) Differentiation in morphology and electrical signalling in four species of para- and sympatric Marcusenius (Teleostei: Mormyridae) from Cote d'Ivoire, West Africa. MARINE AND FRESHWATER BEHAVIOUR AND PHYSIOLOGY, 46 (2). pp. 105-133. ISSN 1023-6244, 1029-0362
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Marcusenius Gill, 1862 species were sampled from the Bandama River and the Comoe River in Cote d'Ivoire, West Africa. Marcusenius gracilis sp. nov. was differentiated from M. senegalensis (Steindachner, 1870), Marcusenius ussheri (Gunther, 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 character displacement among syntopic species can go.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ORGAN DISCHARGES; POLLIMYRUS-ISIDORI; SOUTHERN AFRICA; ALLOPATRIC DIFFERENTIATION; MACROLEPIDOTUS MORMYRIDAE; ACOUSTIC COMMUNICATION; BULLDOG FISH; WAVE-FORM; RIVER; PONGOLENSIS; electric fish; Marcusenius sp; differentiation; electric organ discharges; morphometrics; systematic; speciation |
| Subjects: | 500 Science > 570 Life sciences 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie Biology, Preclinical Medicine > Institut für Zoologie > Alumni or Retired > Verhaltensbiologie und Verhaltensphysiologie (Prof. Dr. Bernd Kramer) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Apr 2020 08:22 |
| Last Modified: | 23 Apr 2020 08:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17000 |
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