Some indicators of biochemical status of perch (L.) with different mercury content in muscles

Some biochemical parameters (total cholesterol, high- and low-density lipoprotein cholesterol, serum triglycerides, total water-soluble protein concentration in blood serum and liver, intestinal mucosa peptidase activity) of the perch (L.) from three reservoirs of the Vologda and Yaroslavl regions of Russia with different levels of mercury pollution were studied. It was shown that in perches with the highest mercury concentration in muscles (0.60 mg/kg wet weight, Lake Kubenskoye), the level of HDL-C, LDL-C, and total cholesterol was significantly higher compared to those in fish from the Sunoga River and the shipping channel of the settlement of Borok (0.38 and 0.012 mg mercury/kg wet weight, respectively). The lowest amount of water-soluble protein in the liver and the highest in the blood serum, as well as a comparatively low activity of intestinal mucosa peptidases were also found in perches from Lake Kubenskoye, the concentration of mercury in the muscles of which was relatively high.