Journal of Environment and Sociobiology

Hemlata Verma ¹, Neera Srivastava ¹

Affiliations
1 Fish Biology Laboratory, Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur-302004, IN

Abstract

Biochemical response has been evaluated in the ovary of Channa punctatus (Bloch) after 135-day exposure to sub-lethal concentrations (0.1 and 0.2 mg/1) of zinc. Changes in glycogen, cholesterol, total proteins and total lipids were estimated. All these parameters showed significant depletion. Results are directly proportional to dose and duration of the experiment. Results indicate that exposure to zinc for prolonged periods may also reduce fecundity of fish, thereby limiting the numerical size of the succeeding generations.

Keywords

Channa punctatus, Zinc, Ovary, Biochemistry.

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Hemlata Verma ¹, Neera Srivastava ¹

Affiliations
1 Fish Biology Laboratory, Center for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur - 302004, IN

Abstract

Indiscriminate use of heavy metals has elevated the risk of contamination of the aquatic habitat. Present study has, therefore, been undertaken to investigate the alterations in bioaccumulation and histopathology of the liver in a freshwater teleost Channa punctatus. On exposure to three sublethal concentrations of zinc (10 mg/l, 15 mg/l and 25 mg/l) for 15 days, statistically significant increase in zinc concentration was noted in the liver of all treated groups. Simultaneously severe histopathological changes were also noted in the liver. Both bioaccumulation and histopathological changes were dose and duration dependent.

Keywords

Zinc, Channa punctatus, Bioaccumulation, Histopathology.

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