摘要
Based on the theory of oxidative stress, it is believed that the induction of antioxidant components of the cellular defense system reflects the adaptive compensatory response of an organism aimed at overcoming stressful conditions. Therefore, this work concentrated on investigating the effect of the low and high tides on the antioxidant system of L. （Littorina） kurila and also compared the antioxidant parameters of two species of gastropods： intertidal--L, kurila and subtidal--L, squalida. The following parameters were evaluated in the hepatopancreas of mollusks： the activity of the antioxidant enzymes SOD （superoxide dismutase）, CAT （catalase）, and GR （glutathione reductase）, the production of ROS （reactive oxygen species）, and the levels of GSH （glutathione） and the lipid peroxidation product-MDA （malondialdehyde）. The results of this work indicate that the state of the antioxidant system of L. kurila reflected the adaptive capacity of the species in the changing environmental conditions.
