Zinc induced architectural alterations and accumulation in the ovary of fresh water Teleost, Channa punctata (bloch)


Helmlata Verma and N. Srivastava


Fish Biology Laboratory, Center for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur-302004, INDIA.

E mail: verma_hemlata06@yahoo.com


Abstract: Fresh water murrel, Channa punctata were kept in aqueous solutions of zinc (Sub-lethal concentrations of 8 mg/l, 10 mg/l and 15 mg/l) for 15 days. Results show reduced GSI and ootoxic conditions. Oolytic changes include shrinkage of oocytes, which resulted in large interfollicular spaces. Distorted appearance of oocytes was a major alteration observed. Atretic follicles also increased in number while immature oocytes decreased. Simultaneously, zinc accumulation was also estimated in the ovary. Zinc accumulation recorded continuous elevation till the end of the experiment. Results are linearly proportional to dose and duration of the experiment. Exposure to zinc can therefore, reduce fecundity of fish thereby limiting the numerical size of the succeeding generation.


Key words: Zinc, Ootoxicity, Fish.



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