Abstract
The present study was undertaken to know the effect of common mixed pulp and paper mill effluent discharge released from century pulp and paper mill Lalkuan, Nainital Uttarakhand on the blood morphology of Heteropneustes fossilis (Singhi). The various morphological changes were observed in the specimen, randomly collected with the help of cast net from (3 sites) different locations. The maximum changes were observed in the specimen collected from site 3 in compare to site 1 and 2 respectively. The formation of inclusion bodies, sickle cells, Cabot rings and ovalocytes were recorded along with nuclear fusion, membrane disruption and cell clumping of blood cells in the specimen collected from the site 3 (i.e. nearer to source of discharge) while in the specimen collected from site 2, the formation of tear drop cell, target cells, spherocytes and bi-nucleated cells were recorded along with the activity of cell clumping. The changes were found less in the specimen collected from site 1 in compare to the specimen of site 2 and 3 i.e. formation of ovalocytes, spherocytes and microcytes with the activity of membrane degeneration and agglutination in blood cells.
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