Parasites of fish in the water bodies of Uzbekistan
Parasites of fish in the water bodies of Uzbekistan

Summary/Abstract: This work studies communities of parasites of fish in water bodies in three regions of Uzbekistan with a varying environmental background. In each region the research was conducted during the fishing seasons. The team of researchers identified 116 species of parasites in 10 classes. The protists are represented by the following families: Trypanosomatidae (Tripanosoma carassi, T. percae, T. scardini), Bodonidae (Ichthyobodo necator), Cryptobiidae (Cryptobia cyprini, C. branchialis), Caliptosporidae (Goussia leucisci), Eimeriidae (Eimeria esoci, E. gasterostei, E. percae), Myxidiidae (Myxidium macrocapsulare, M. pfeifferi, M. rhodei, Zschokkella nova), Myxobilatidae (Myxobilatus legeri), Myxosomatidae (Myxosoma acutum, M. multiplicatum), Myxobolidae (Myxobolus bramae, M. carassi, M. dispar, M. mülleri, M. musculi, Henneguya lobosa), Amphileptidae (Hemiophrys branchiarum, H. disciformis), Chilodonellidae (Chilodonella piscicola), Trichophryidae (Capriniana piscium), Trichodinidae (Trichodina acuta, T. esocis, T. mutabilis). Monogenoidea shows the highest species diversity and is represented by 30 species: Dactylogyridae (Dactylogyrus auriculatus, D. anchoratus, D. borealis, D. cordus, D. crassus, D. crucifer, D. difformis, D. falcatus, D. formosus, D. intermedius, D. micracanthus, D. nanus, D. mallus, D. parvus, D. ramulosus, D. similis, D. tuba, D. vastator), Ancyrocephalidae (Silurodiscoides siluri, S. obscurus), Gyrodactylidae (Gyrodactylus cyprini, G. elegans, G. carassii, G. montanus, G. vicinus), Diplozoidae (Diplozoon paradoxum, D. hamaion, D. nipponicum, Diplozoon megan). Cestoda (Khawia rossittensis, Kh. sinensis, Triaenophorus nodulosus, T. crassus, Bothriocephalus opsariichthydis, Diphyllobothrium latum, D. ditremum, Schistocephalus pungitii, Ligula intestinalis, L. colymbi, Digramma interrupta, Proteocephalus cernuae, Proteocephalus osculatus, Proteocephalus torulosus, Gryporhynchus pusillus, Paradilepis scolecina), Trematoda (Ornithodiplostomum scardini, Posthodiplostomum brevicaudatum, Diplostomum helviticum, D. spathaceum, D. rutili, Hysteromorpha triloba, Tylodelphus clavata, Apharingostrigea cornu, Apatemon fuligulae, Cotylurus pileatus, Tetracotyle sogdiana, Bucephalus polymorphis, Ripidocotyle campanula, Azygia lucii, Sanguinicola inermis, Echinochasmus coaxatus, Petasiger neocomense, Allocreadium siluri, Metorchis xanthosomus, Phyllodistomum elongatum) and Nematoda (Pseudocapillaria tomentosa, Dioctophyme renale, Eustrongylides excisus, Eu. mergorum, Raphidascaris acus, Contracaecum microcephalum, Porrocaecum reticulatum, Camallanus lacustris, Phylometra ovata, Ph. rishta, Phylometroides sanguinea, Rhabdochona denudata, Streptocara crassicauda, Desmidocercella numidica, Gnathostoma hispidum) are represented by 18, 20 and 15 species, respectively. Only 2 species were identified within the class Acanthocephala (Acanthocephalus anguillae, Pomphorhynchus laevis). 10 species and 7 genera were recorded for the first time in Uzbekistan. Bodies of water within the Syr Darya basin proved the most abundant in endoparasites (55 species), with a slightly smaller number of helminths from this group (48 species) registered in the Amu Darya bodies of water. Bodies of water in the Zeravshan basin are characterised by the smallest number of species of parasitic worms (28). Our research established that endoparasites use fish as their definitive (41.8%), intermediate (50.8%), and reservoir hosts (7.2%). The material suggests a rather complex relationship between endoparasites and fish. This biocoenotic relationship has probably developed over a long period of time, resulting in the formation of the modern endoparasitic fauna in Uzbekistan.

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