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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23313

Title: Reduced host-specificity in a parasite infecting non-littoral Lake Tanganyika cichlids evidenced by intraspecific morphological and genetic diversity
Authors: Kmentova, Nikol
Gelnar, Milan
Mendlova, Monika
Van Steenberge, Maarten
Koblmüller, Stephan
Vanhove, Maarten P.M.
Issue Date: 2016
Citation: SCIENTIFIC REPORTS, 6 (Art N° 39605)
Abstract: Lake Tanganyika is well-known for its high species-richness and rapid radiation processes. Its assemblage of cichlid fishes recently gained momentum as a framework to study parasite ecology and evolution. It offers a rare chance to investigate the influence of a deepwater lifestyle in a freshwater fish-parasite system. Our study represents the first investigation of parasite intraspecific genetic structure related to host specificity in the lake. It focused on the monogenean flatworm Cichlidogyrus casuarinus infecting deepwater cichlids belonging to Bathybates and Hemibates. Morphological examination of C. casuarinus had previously suggested a broad host range, while the lake's other Cichlidogyrus species are usually host specific. However, ongoing speciation or cryptic diversity could not be excluded. To distinguish between these hypotheses, we analysed intraspecific diversity of C. casuarinus. Monogeneans from nearly all representatives of the host genera were examined using morphometrics, geomorphometrics and genetics. We confirmed the low host-specificity of C. casuarinus based on morphology and nuclear DNA. Yet, intraspecific variation of sclerotized structures was observed. Nevertheless, the highly variable mitochondrial DNA indicated recent population expansion, but no ongoing parasite speciation, confirming, for the first time in freshwater, reduced parasite host specificity in the deepwater realm, probably an adaptation to low host availability.
Notes: [Kmentova, Nikol; Gelnar, Milan; Mendlov, Monika; Vanhove, Maarten P. M.] Masaryk Univ, Fac Sci, Dept Bot & Zool, Kotlarska 2, CS-61137 Brno, Czech Republic. [Van Steenberge, Maarten; Vanhove, Maarten P. M.] Royal Museum Cent Africa, Biol Dept, Leuvensesteenweg 13, B-3080 Tervuren, Belgium. [Van Steenberge, Maarten; Koblmueller, Stephan] Graz Univ, Inst Zool, Univ Pl 2, A-8010 Graz, Austria. [Van Steenberge, Maarten; Vanhove, Maarten P. M.] Univ Leuven, Lab Biodivers & Evolutionary Genom, Dept Biol, Ch Deberiotstr 32, B-3000 Leuven, Belgium. [Koblmueller, Stephan] Acad Sci Czech Republic, Inst Vertebrate Biol, Kvetna 8, CS-60365 Brno, Czech Republic. [Vanhove, Maarten P. M.] Hasselt Univ, Ctr Environm Sci, Res Grp Zool Biodivers & Toxicol, Agoralaan Gebouw D, B-3590 Diepenbeek, Belgium. [Vanhove, Maarten P. M.] Royal Belgian Inst Nat Sci, Capac Biodivers & Sustainable Dev, Operat Directorate Nat Environm, Vautierstr 29, B-1000 Brussels, Belgium.
URI: http://hdl.handle.net/1942/23313
DOI: 10.1038/srep39605
ISI #: 000390268100001
ISSN: 2045-2322
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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