Environmental pollution monitoring: Comparison of histological variation of tissues of two different sampling site Pulicat and Ennore

Estuaries are important sinks of pollutants derived from anthropogenic activities. Fish inhabiting these areas have been proposed as sentinels for pollution monitoring through assessment of sensitive biomarkers. Biomarkers can be defined as a change in biological response, ranging from molecular through behavioural changes, which can be related to exposure or effects of environmental contaminants. The present study was focused to examine the histological changes in the comparatively in polluted samples collected from two different sites. Tissue samples of Mullet, Oyster, Green mussels and Polychaete were collected from Pulicat lake and Ennore creek flow to the bay of bengal forming a common canal known as buckingham Canal. Samples were sectioned, stained and visualised by light microscopically the histological changes was observed and confirmed the environmental factors was involved in the structural, behavioural changes and also changing the biochemical activity of the organisms.