Variability of some antioxidant defense parameters and concentration of protein in the larvae of the three-spined stickleback (Gasterosteus aculeatus) in White Sea in the summer

The content of protein and glutathione in the tissues of fries of the three-spined stickleback and the activity of glutathione S-transferase and guaiacol peroxidase changed in the process of growth from July to August. They were different in larvae from the lagoon Kolyskovaya , in those from the Bay Seldjanaja and from the channel Sukhaya Salma. In the Bay Seldjanaja and the channel Sukhaya Salma, the food reserve is sufficient for feeding and growth of fries, while the biodiversity and the number of food objects in the Kolyushkovaya lagoon are extremely low. It has a negative impact on the larvae, which affect their weight, protein accumulation, and lead to the activation of both enzymes of antioxidant protection (glutathione S-transferase and guaiacol peroxidase). In the larvae from the channel Sukhaya Salma the decrease in the average weight as well as in the levels of glutathione and activity of glutathione S-transferase were revealed. These changes are probably related to the lower temperature in this biotope. Therefore, in August fries hatched in July prevailed; they are characterized by lower values of the above indicators.