Toxicological study of heavy metals on physiology of fresh water fish clarias batrachus

Abstract

Among the all life constituents, the water have remarkable important for the life of plants and animals. But due to modernization of the world with heavy industrialization causes too much domestic sewage and industrial influents which put our ecosystem in to danger. Many chemicals showed there toxic effects on aquatic organisms because of this pollution severity the aquatic animals may reduce the number, their breeding efficiency which may also alter the natural behavioral patterns of the aquatic organisms. The natural aquatic environment may alter with progress in agriculture including various pesticides, herbicides, fungicides, rodenticides etc. the industrialization may responsible for aquatic influents including various chemicals like heavy metals such as mercury, copper, aluminum, zinc etc. as their products. newlineAn unending industrialization, increasing population density and too much fast organization has increased severity of human population. In recent years the development of agriculture sectors, thermal plants, increasing vehicle traffic, sewage problem are including the good economic development on the one side and environmental damage so called pollution on the other side. newlinePollution of the environment is one of the most horrible ecological crises. It is by product of the modern age of science. The excess use of chemicals such as organic and inorganic pollutants including industrial wastes, fertilizers, pesticides, insecticides and herbicides etc. have newlineII newlineincreased extensively on large scale. When these pollutants release into newlineany type of water bodies, they pollute the aquatic biota. Among above newlinepollutants some heavy metals on certain low concentrations are desirable newlinefor the growth of organisms, but it s over accumulation is hazardous and newlinemost of the heavy metals act as a pollutants in aquatic ecosystem. newlineThe toxic impact of different pollutants is the major task of ecobio newlinesystem. In regards to this, it has been observed that they influence newlinethe structure and temptation of whole ecosystem and communties.