Vol. 2, Issue 6 (2017)
Laboratory attempt to evaluate the short term toxicity of micronutrient (ZN) to the fresh water fish, Rasbora daniconius HAM
Author(s): Momin Heena, Momin Shakir
Abstract: Man made activities like mining, industrial discharge, sewage; sludge disposal, fertilizers and pesticides applications have been the major culprit for elevated level of copper, Lead, Mercury and various heavy metals in all the natural ecosystems. The metals which find their way in to commercial industrial application posses certain biocidal properties. Metal being immutable, cannot be destroyed or transform in to other metal and hence, once it is mobilized in to the environment, it total amount remain same. However, it can be converted in to one or the other salt and enter in to different organisms. Among the non-essential elements exposure, lead and zinc are of particular importance. Although a certain fraction of the amount absorbed is excreted, lead and zinc tends to accumulate in important organs of body. There is a narrow tolerable region of these metals. Hence, once accumulated these metals disturb the well being of the human body. Although, it is known that many metals are toxic to aquatic organisms. Knowledge regarding their exact actions and the level at which they become harmful is far from complete. Therefore, an attempt has been made to study the effects of Zn on common edible fresh water fish, Rasbora daniconius.