Effects of Environment and Physiological State of an Organism on the Activity and Content of Lysozyme in Fishes of the Family Cyprinidae: A Review

The effect of environmental factors such as water temperature, experimental conditions (fish in control), toxicants (heavy metals, herbicides, insecticides, etc.), and features of physiological state (starvation, early ontogenesis, reproduction, and relationship) on the activity and content of lysozyme in serum/plasma and some immune organs in fishes of the family Cyprinidae have been reviewed. Similar and multidirectional reactions of the enzyme under the influence of the same factors, as well as a wide range of variation, various units, and dimensions of the studied parameter of nonspecific resistance, have been shown. This review presents research materials that have been published in the past 15 years.