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Research Paper | Fisheries and Aquatic Environmental Management | India | Volume 12 Issue 5, May 2023 | Rating: 4.9 / 10

A Study of Cr (VI) Induced Toxicity on the Histology of Gill, Liver, Kidney of Freshwater Fish Channa punctatus (Bloch. 1793)

Anshika Singh | Vivek Kumar ^[23]

Abstract: Environmental preservation is a major problem for the ecological balance on a worldwide scale. Chromium is a heavy metal that is regarded as one of the most pervasive pollutants in the aquatic environment. The most hazardous of all of its oxidation states is Cr (VI). Aquatic organisms absorb Cr through their gastrointestinal or respiratory tracts, so determining the influence there are histological parameters. The goal of the current experiment was to establish the subacute toxicity of Cr (VI) in light of its impact on histological parameters in the fish Channa punctatus, which had a length of 15-20 cm and a weight of 30-35 g, in a laboratory aquarium filled with 100 litres of water under natural 12D:12L conditions. Fish were exposed to three different Cr concentrations, including the control (LC50/0, LC50/5, LC50/10, and LC50/20). Live fish were slain for the preparation of gill, liver, and kidney slides for the weekly examination in order to determine histological parameters and effects such as vacuolization, necrosis, apoptosis, pyknotic nuclei development, etc. The impact only became apparent after chromium bioaccumulated and concentrated in the kidney, liver, and gills. A 4-week long experiment demonstrating changes in tissues compared to control tissues. The highest concentration (20 mg/l) has the greatest effect when compared to the lowest concentration (5 g/l). According to legend, Cr (VI) is a hazardous metal that can cause cancer and mutagenesis. Thus, we should provide disposable management of rubbish discharge and industrial effluents.

Keywords: Channa punctatus; chromium; toxicity; bioaccumulation; and histological criteria

Edition: Volume 12 Issue 5, May 2023,

Pages: 2273 - 2280