Informace o publikaci
CICHLIDOGYRUS SPP. (MONOGENEA: DACTYLOGYRIDAE) COMMUNITIES OF CICHLIDS FROM THE CONGOLESE LAKESHORE OF LAKE TANGANYIKA: NEW MONOGENEAN SPECIES, FISH HOST AND DISTRIBUTIONAL RECORDS
| Autoři | |
|---|---|
| Rok publikování | 2017 |
| Druh | Konferenční abstrakty |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | In summer 2013 and 2016, a total of 148 cichlid individuals belonging to 28 Tanganyikan species were collected from the Congolese lakeshore and examined for gill ectoparasites. Morphological and molecular identifications of the gill monogeneans were performed, and phylogenetic analyses were carried out by employing different molecular markers (28S rDNA, 18S rDNA and ITS-1). The examination of fish gills revealed the presence of 191 monogenean specimens and allowed us to recognize 24 Congolese Cichlidogyrus species, of which 14 are new for science. Our investigation represents the first parasitological examination of representatives belonging to the Tanganyikan cichlid genera Callochromis, Cyphotilapia, and Xenotilapia. Likewise, a few Cichlidogyrus species have already been recognized on the gills of Petrochromis spp., but no formal description has been provided yet. Our study allowed us to record 7 new Cichlidogyrus species on specimens of Petrochromis. Recent studies on the parasite diversity of Ophthalmotilapia spp. illustrated a remarkable biogeographical diversity among their monogenean communities along the lake. Four Cichlidogyrus species previously recognized on various species of Ophthalmotilapia inhabiting several Tanganyikan localities were found on the gills of the representative host studied. They are three new currently undescribed Burundese Cichlidogyrus species in addition to C. sturmbaueri previously found on Zambian O. ventralis and Tanzanian O. nasuta. Further, Congolese Aulonocranus dewindti hosted two new Cichlidogyrus species exhibiting similar morphotypes with two other species found on the same host from the Burundese lakeshore. Contrariwise, a new locality record is reported for a new undescribed Cichlidogyrus identified on Cyprichromis microlepidotus. Cichlidogyrus specimens sampled from the gills of Tylochromis polylepis represent C. mulimbwai, C. muzumanii and C. sp. “T. polylepis 3”. We provide a morphological characterization of the hard parts of haptor and reproductive organs of this last species. Finally, Pseudosimochromis babaulti, P. curvifrons and Simochromis marginatus were parasitized by C. frankwillemsi, C. franswittei and C. georgesmertensi as previously reported. However, P. babaulti, in addition to C. georgesmertensi, hosted also C. franswittei, a species known to infect the gills of P. curvifrons and S. marginatus. Morphologically similar new Cichlidogyrus species mirror the relatedness among their cichlid hosts. The geographic intraspecific variation of Tanganyikan cichlid hosts play probably a role in their Cichlidogyrus speciation and distribution. Acknowledgments This study was supported by Czech Science Foundation, project No. P505/12/G112 (ECIP). |