1997•International Journal of Environmental StudiesRequires access

Effect of zinc on maturation and breeding potential ofCyprinus carpioandCirrhina mrigala

Asha Dhawan, Kamaldeep Kaur

Abstract

Effects of safe and sublethal concentrations of zinc were observed on ovarian maturation and breeding potential of carps. Exposure of Cyprinus carpio to 56 and 100 μg/L and Cirrhina mrigala to 560 and 1000 μg/L of zinc for 60 days during each of the preparatory and prespawning phases of reproduction revealed concentration dependent decline in gonado‐somatic index, ova diameter and absolute fecundity complemented with decline in total proteins and total lipids in the ovaries. Exposed fishes were also induced to breed except C. carpio exposed to sublethal concentration.

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Key concepts: Cyprinus, Fecundity, Breed, Biology, Reproduction, Animal science, Zinc, Veterinary medicine