ABSTRACT
The article presents data on the peculiarities of the histological structure of the hepatopancreas and cytometric parameters of the Prussian carp hepatocytes from the Zaporizhian (Dnipro) reservoir in the modern conditions. The morphological changes were not observed during the morphological examination of the hepatopancreas of the Prussian carp (Carassius gibelio (Bloch, 1782)). Cytometric examination revealed that the fish from the Samara Bay showed signs of typical hypertrophy. They also showed a decrease in the nuclear-cytoplasmic ratio. During histopathological examination of the hepatopancreas necrosis was revealed, the most common necrosis occurred in autumn in fish of the Samara Bay and was 8,1 ± 0.1% of the researched samples in females and 8.2 ± 0.2% in males. In the fish from the lower part, this figure was slightly lower. Adipose degeneration of the Prussian carp hepatocytes from the Samara Bay was more common compared to the fish from the lower part of the reservoir, namely the highest percentage of this pathology was recorded in fish in autumn and was 36 ± 0.4% in females and 34.3 ± 0.5% in males, respectively.Most histopathologies in the hepatopancreas are found in the Prussian carp from the Samara Bay, which may be due to the complex action of the external factors.
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