Loboiko Y. Scientific bases for raising the productivity of fishponds with the use of highly effective means of combating ectoparasites invasions of carp

The dissertation is devoted to the research of scientific bases of raising the productivity of fishing ponds with the use of highly effective means of combating ectoparasites in carp invasions, features of the ecological parasitological aspect of growing yearlings carp in pond farms. The epizootic situation concerning the distribution of carp ectoparasites in fish farms of the Lviv region for the influence of abiotic factors of the aquatic environment was first investigated; changes in fish-biological indicators of these carp species for invasions by ectoparasites were determined. A series of new data on the influence of different degrees of invasion by ectoparasites obtained on the following: hematological parameters, total protein content and protein fractions in serum and organs of the one-year-old carp; immune status, peculiarities of mutagenic, genotoxic and cytotoxic action of ectoparasites on the organism of fish; activity of aminotransferases; content of products of lipid peroxidation; the activity of antioxidant enzymes in the tissues of one year old carp. The effectiveness of the use of the antiparasitic preparation «Brovermektin-granulate» for the carp ectoparasites in the production conditions has been established. Feeding yearlings carp with the medical feed mixture containing 0.25% of the «Brovermektin-granulate» product provided the extensiveness of 80.0–100.0% and the intensive efficiency of 83.3–100.0% on unfavourable lernaea and dactylogyrus farms