Toxic effects of mining effluents on fish gills in a subarctic lake system in NW Russia

摘要: The mining company Karelian Pellet in northwestern Russia extracts iron ore and processes it locally into pellets. production operations affect the environment form of air pollution wastewater emissions to lakes downstream from factory. toxic effects effluents on gills perch (Perca fluviatilis) roach (Rutilus rutilus) were studied. In close factory, heavy metal concentrations not high, even though content sediment was elevated. fish relative proportion phosphatidylcholine elevated cholesterol reduced, while histological structure changed. number mucus cells, as well sizes lengths open areas chloride had increased spring summer. hypertrophy cells is possibly caused by ambient K+ Li+. Changes gill phospholipid proportions increase fluidity membranes strengthen their protective qualities, counterbalancing adverse changes cell structure. bioavailability metals are reduced hardness high pH water discharged plant.