ABSTRACT

Addition of undesirable substances into the water bodies cause changes in the physical, chemical and biological characteristics of the aquatic system which lead to ecological imbalance. Histological studies used as the tool for assessing the toxic effects in the target organs of fish in laboratory experiments and in the field experiments. The present study is to analyse the histological parameters in the fish (Oreochromis mossambicus) exposed to different concentrations of effluent contaminated wastewater collected form Vattakayal near industrial area. The lethal concentration LC50 was calculated as 2.4%. It has been observed that the fish after treatment exhibit lethargic. Gills are the first targeted organs to the polluted water. In the present observation fish exposed to the different concentrations exhibited various abnormalities in the gills like epithelial hyperplasia, curling of secondary, aneurism, lamellar fusion, epithelial lifting, dilation and congestion in the blood vessels of primary gill lamellae, desquamation, and atrophy. Keywords: Oreochromis mossambicus (Peters), Histology, Waste water, Gill, industrial area
Publication date: 01/03/2023

https://ijbpas.com/pdf/2023/March/MS_IJBPAS_2023_6990.pdf

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https://doi.org/10.31032/IJBPAS/2023/12.3.6990