[The influence of insulin on contamination of the common carp Cyprinus carpio by the monogenetic fluke Dactylogyrus vastator].

The influence of insulin on the contamination of the carp Cyprinus carpio with the monogenetic fluke Dactylogyrus vastator is studied. Fishes reacted to the introduction of the hormon by the decrease in the degree of intensity of infection and by the increase in the number of lifeless parasites on gills, by contrast to control fishes and fishes processed with stress hormones (adrenaline and cortisol). We assume that the decrease in the abundance index in live monogenetic fluke and the increase in the number of lifeless oness is caused by the deficiency of nutrients accessible for the growth and development caused by activation of hormone-induced anabolic processes and stimulation of mechanisms of immune protection.