Parasitic Diseases of the Perch (Perca fluviatilis L.) in Detention Reservoirs of the Morava River Basin

Abstract

The investigation showed that the perch (P. fluviatilis ) was endangered by a number of parasitic diseases. A total of 15 parasitic species were determined, 8 among them were protozoa: Dermocystidium percae, Henneguya psorospermica, Chilodonella cyprini, Apiosoma campanulata , Apiosoma piscicola, Trichodina domerguei subsp. acuta, Trichodinella epizootica f. percarum, Trichophrya piscium . The strongest infections were caused by Trichodinella epizootica f. percarum and Trichophrya piscium . Five species of parasitic helminths were determined: Proteocephalus percae , the plerocercoid of Triaenophorus nodulosus , the metacercaria of Tylodelphis clavata, Camallanus lacustris , and Acanthocephalus lucii . Parasitic arthropods were represented by two species: Ergasilus sieboldi on gills was frequent, Hydrozoetes lacustris occurred sporadically