Dynamics of some cellular and humoral non-specific immune parameters in Siberian sturgeon (Acipenser baeri Brandt) reared in a water recirculation system

Abstract

The present study deals with the dynamics of selected cellular and humoral non-specific immune parameters in Siberian sturgeon (Acipenser baeri Brandt) fry during three years of intensive rearing under controlled conditions. It was observed that NBT reduction ability, lysozyme index, γ-globulin level, and total plasma protein content were closely related to fish body mass. Lysozyme activity and γ-globulin level were temperature-dependent. The observed relationships were described with the regression equations. Ceruloplasmin activity in older fry was significantly higher than in younger fish. Changes in phagocytic ability of leucocytes were also noted, accompanied by high variation of lymphocyte counts and lysozyme activity.