Currently, an alien fish species, the silver Prussian carp Carassius gibelio is
widespread in almost all reservoirs of Belarus due to its high competitiveness. The
introduction of silver Prussian carps in commercial reservoirs of the Republic
caused significant replacement of the native species, the crucian carp. Potentially,
alien helminth species introduced in water bodies by the silver Prussian carp have
affected the crucian carp population. The helminth fauna of the silver Prussian carp
in Belarussian water bodies is represented by 16 species: 1 nematode species (genus
Philometroides Yamaguti, 1935), 2 cestode species (1 of the genus Neogryporhynchus
Baeret Bona, 1960, and 1 of the genus Khawia Hsu, 1935); 6 monogeneas (4 of the genus Dactylogyrus Diesing, 1850; 1 of the genus Gyrodactylus Nordmann, 1832,
and 1 of the genus Diplozoon Nordmann, 1832); 7 trematode species (1 of the genus
Rhipidocotyle Diesing, 1858, 2 of the genus Posthodiplostomum Dubois, 1936, 1 of the
genus Diplostomum Nordmann, 1832, 1 of the genus Ichthyocotylurus Odening, 1969,
1 of the genus Paracoenogonimus Katsurada, 1914, and 1 of the genus Tylodelphys
Diesing, 1850). The helminth fauna of the crucian carp is represented by 13 species:
1 acanthocephalan species (genus Acanthocephalus Koelreuter, 1771); 1 nematode
species (genus Camallanus Railliet et Henry, 1915); 3 cestode species (1 of the genus
Caryophyllaeus Gmelin, 1790, and 2 of the genus Khawia Hsu, 1935); 3 monogeneas
(1 of the genus Dactylogyrus Diesing, 1850, 1 of the genus Gyrodactylus Nordmann,
1832, and 1 of the genus Diplozoon Nordmann, 1832); and 5 trematode species (1 of
the genus Echinochasmus Dietz, 1909, 1 of the genus Paracoenogonimus Katsurada,
1914, 1 of the genus Tylodelphys Diesing, 1850, 1 of the genus Allocreadium Looss,
1900, and 1 of the genus Phyllodistomum Braun, 1899). The helminth fauna had low
similarity (4 species) in the silver Prussian carp when compared with the crucian carp.