| Abstract |
Background. Various ecological groups of parasites determine the features of functional development of fish. Studied parasitological, physiological and hematological characteristics of roach in payprotocol pond – Argazinskoe reservoir in the Chelyabinsk region.
Materials and methods. The object of the study was the mass species – roach, which has been studied at different habitats of the Argazinskoe reservoir. The composition of ectoparasites, helminths, hematological characteristics and features of development on such indicators as growth, fatness and fertility were studied.
Results. Dominants were protozoa ectoparasites: Myxidium rhodei, Myxobolus muelleri, Trichodina reticulate, Trichodina nigra. Intramuscular and intracavitary helminths occur occasionally with the exception of diplostomiasis, which contribute to biotopic differentiation, which is manifested in the concentration of fish with this parasite in the pre-dam area of the reservoir. Found dangerous for humans helminth opisthorchiasis, which is rarely found in the upper Ob-Irtysh basin. This helminth in recent years has been observed in many reservoirs of the cascade on the Miass river. The presence of the simplest ectoparasites does not affect such characteristics of development as growth, fertility, fatness. On the contrary helminths inhibit the development of fish. The identified statistical relationship between the increase in the density of ectoparasites and concentration of individual red blood cells roach. With
increasing density of the simplest ectoparasites increases the concentration of red blood cells and lymphocytes in the blood of roach. Thus, the simplest ectoparasites can be indicators of the immune system of fish.
Conclusions. Parasitic fauna of roach Argazinskoe reservoir is typical for the species and includes and includes opisthorchiasis. The presence of the simplest ectoparasites does not affect such characteristics of development as growth, fertility, fatness. On the contrary helminths inhibit the development of fish. With increasing density of the simplest ectoparasites increases the proportion of red blood cells and lymphocytes in the blood.
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