Stress and biological responses seen in aquatic organisms due to some trace elements
It is important to use biochemical, histologic, and histopathological methods to evaluate pollution levels from heavy metals at sublethal levels in clear and polluted regions. Biochemical defects in aquatic organisms are seen as secondary reactions to heavy metals after stress. Secondary responses can also be observed from the physiological effects of heavy metals. Secondary reactions can be measured by changes in biochemical, hematologic and histopathologic parameters. This study was designed to explain the general health problems and biological responses that are associated with toxic heavy metals in aquatic organims.