Global contamination by persistent organochlorines and their ecotoxicological impact on marine mammals

摘要: Abstract The present paper overviews the global contamination by persistent organochlorines and their ecotoxicological implications on marine mammals. recent pattern of organochlorine residues in coastal environment is prominent tropical regions due to continuous usage low-latitude developing countries. major emission source probably belt large quantities volatilized contaminants are dispersed through atmosphere terms. Reflecting this, a considerable was observed open ocean waters as well Arctic nearby waters. study mass transfer at air-water interface suggests that oceanic water bodies, particularly waters, act sink for contaminants. In this regard, mammals, cetaceans, one animal groups receiving high concentrations arising out worldwide contamination. They can amplify much greater amounts toxic feeding also pass them from generation next lactation. Unfortunately, these animals have smaller capacity degradation specific mode cytochrome P-450 enzyme systems. These drug-metabolizing systems may be related possible effects organochlorines, coplanar PCBs. Furthermore, residue levels mammals unlikely decline near future. Considering all facts it concluded most vulnerable target organisms with regard long-term toxicity hazardous man-made chemicals