Toxicity of Chromium on the Histopathological Changes in Gill and Liver of Fresh Water Fish Labeo rohita Fingerlings

The purpose of this study was to see if the heavy metal chromium has any effect on the histopathology of Labeo rohita fingerlings. The fingerlings were subjected to a 10% sublethal chromium concentration of 96 hours Lc5o for 10, 20, and 30 days (3.5ppm). During this time, fish were fed artificially produced food (on the 10th, 20th, and 30th days, fish were removed, slaughtered, and the gill and liver tissues were removed). During a 10-day period of exposure, Gill subjected to sub-lethal chromium concentrations showed modest histological changes. Hypertrophy and degradation of the epithelium are visible after 30 days of gill lamellae fusion. Vacuolation, hepatocyte degeneration, and hepatocyte cell boundary degeneration were among the liver abnormalities. These findings revealed that the degree of distortion of metal concentrations in the gills is dosage and time dependent. Chromium has an effect on different biochemical and metabolic enzymes in the gill and liver of the freshwater fish Labeo rohita. Heavy metal stress causes histopathological abnormalities in the gill and liver of the freshwater fish Labeo rohita.

Author(S) Details

P. Naga Jyothi
Department of Fishery Science and Aquaculture, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.

P. Sreenivasulu
Department of Fishery Science and Aquaculture, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.

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