Abstract
This paper investigates the impact of tannery industry wastewater on O. mossambicus. The histopathological changes observed in gills, liver, kidney and brain of the studied fish have demonstrated the quality status of industrial waste water. In the vital organs, the following marked changes were observed: filament cell proliferation, cellular infiltration, haemorrhage and epithelial lifting in gills, vacuolation of hepatocytes and necrosis in liver, exfoliation and swollen with pyknotic nuclei in kidney and enlarged pyramidal cells, binucleated nuclei, vacuolation, and necrosis in brain. These changes might be due to the various components of tannery wastewater on fish. Hence, proper treatment of tannery industry wastewater is highly recommended through this study. Key words: Oreochromis mossambicus, acute toxicity, histopathology, tannery mill wastewater, liver, gills, kidney, brain
Highlights
The tannery industry has shown tremendous expansion during the last 25 years
This study has been carried out to understand the status of gill, liver, kidney and brain tissues of Oreochromis mossambicus exposed to tannery industry wastewater
After the duration of experiment (60 days), fish were taken from the respective concentrations and subsequently the vital organs were removed by live dissection and fixed in Davidson fluid for 24 h
Summary
The tannery industry has shown tremendous expansion during the last 25 years. the tannery industry adds pollutants to the aquatic environment. Physiological and biochemical parameters as indicators of water quality were used to detect sub-lethal impacts of pollutants. Prominent among these biomarkers are haematological data (Lohner et al, 2001; and physiological variables, such as plasma levels of metabolites (Ebeling, 1931) and ions (Kohler, 2002), levels of hormones like cortisol (Walden, 1976) and. This study has been carried out to understand the status of gill, liver, kidney and brain tissues of Oreochromis mossambicus exposed to tannery industry wastewater.
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