The estimation of impact of water-soluble fraction crude oil to deep-water Baikal amphipod Ommatogammarus carneolus melanophthalmus

The purpose of current work was to assess the effect of water-soluble oil fractions on survival, lactate content and heat shock proteins HSP70 in the deep-water Baikal amphipod - Ommatogammarus carneolus melanophthalmus. Amphipods were exposed for two days in solutions of water-soluble oil fractions at a concentration of 50 μg/L. During exposition time mortality of amphipods was not observed. Significant deviations from the control values for the studied biochemical parameters of O. carneolus melanophthalmus, were not detected. It can be explained by reduction of activity of stress-response mechanisms in deep-water amphipods due to adaptation to stable environmental conditions.