https://doi.org/10.65770/RMNV9712
ABSTRACT
Churni River is flowing through Nadia district in West Bengal, India. There was huge biological diversity in this river for fishes. But the water of the river has been polluted, creating loss of biodiversity since last few decades due to anthropogenic activities. Freshwater snails, Bellamya bengalensis, were manually collected from different selected sites of the Churni River in Nadia district. Some sites were not associated with human habitats, human effluents (site A). Some sites were associated with wastewater, domestic sewage, and other anthropogenic activities (site B). Hemocytes, the immune cells, were isolated, and phagocytic index was calculated. Degeneration of nucleus of cells and increased roundness of hemocytes with decreased number of pseudopods were noted in the hemocytes of site B group as compared to site A group of snails. Mean phagocytic index was significantly reduced in site B polluted group which may lead to alter the immune status of the animals, considering as biomarker of aquatic pollution.
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