Hexavalent chromium (Cr-VI), widely used in tanning industries, is a potent toxic metal whose accumulation in the animal body can adversely affect the reproductive organs. District Kasur, Pakistan, is famous for having tanneries industry where Cr (VI) is directly discharged untreated into the adjoining water nullahs. Resultantly, wildlife species, reliant on these water sources, are exposed to chromium toxicity, which enters into the animal body through drinking water and food chain. The current study investigated toxic effects of Cr(VI) on testicular tissue of adult small Indian mongoose inhabiting the study area from February 2015 to January 2016. Average Cr-concentrations, in experimental area soil and water, and the blood and tissue samples of the species were found significantly higher compared to control. Average body and testicular weights of experimental animals were found reduced. Histological analysis revealed seminiferous tubules disorganized in experimental animals, depleted germ cells and hyperplasia of the Leydig cells. Sperm counts were found reduced. Serum testosterone and LH levels were found reduced while FSH levels increased in experimental animals. The study concludes that Cr being discharged from tanneries into the environment is up taken by small Indian mongoose leading to severe testicular tissue damage and potential impairment of reproductive function of the species.
Published Date: 2021-06-30; Received Date: 2021-06-09