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Monogenean parasites of sardines in Lake Tanganyika: diversity, origin and intra-specific variability

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KMENTOVÁ Nikol VAN STEENBERGE M. RAEYMAEKERS J. A. R. KOBLMÜLLER S. HABLÜTZEL P I MUTEREZI Bukinga F MULIMBWA N SIBULA T. MASILYA MULUNGULA P. NZIGIDAHERA B. NTAKIMAZI G. GELNAR Milan VANHOVE Maarten Pieterjan

Rok publikování 2018
Druh Článek v odborném periodiku
Časopis / Zdroj Contributions to Zoology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://dx.doi.org/10.1163/18759866-08702004
Doi http://dx.doi.org/10.1163/18759866-08702004
Klíčová slova Clupeidae; Dactylogyridae; fisheries targets; phenotypic variability; phylogeny
Popis Whereas Lake Tanganyika’s littoral and benthic zones are famous for their diverse fish communities, its pelagic zone is dominated by few species, of which two representatives of Clupeidae (Limnothrissa miodon and Stolothrissa tanganicae) take a pivotal role. We investigated the monogenean fauna infecting these freshwater clupeids to explore the link between parasite morphology and host species identity, or seasonal and geographical origin, which may reveal host population structure. Furthermore, we conducted phylogenetic analyses to test whether these parasitic flatworms mirror their host species’ marine origin. Based on 406 parasite specimens infecting 385 host specimens, two monogenean species of Kapentagyrus Kmentová, Gelnar and Vanhove, gen. nov. were morphologically identified and placed in the phylogeny of Dactylogyridae using three molecular markers. One of the species, Kapentagyrus limnotrissae comb. nov., is host-specific to L. miodon while its congener, which is new to science and described as Kapentagyrus tanganicanus Kmentová, Gelnar and Vanhove, sp. nov., is infecting both clupeid species. Morphometrics of the parasites’ hard parts showed intra-specific variability, related to host species identity and seasonality in K. tanganicanus. Significant intra-specific differences in haptor morphometrics between the northern and southern end of Lake Tanganyika were found, and support the potential use of monogeneans as tags for host population structure. Based on phylogenetic inference, we suggest a freshwater origin of the currently known monogenean species infecting clupeids in Africa, with the two species from Lake Tanganyika representing a quite distinct lineage.
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