GENOTOXIC EFFECT OF NICKEL CHLORIDE AND ZINC SULPHATE ON FISH HYPOPHTHALMICHTHYS MOLITRIX
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Authors
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S. Athikeshvan
Unit of Environmental Health Biotechnology, PG and Research Department of Zoology,
Loyola College, Chennai - 600 034, India.
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S. Vincent
Unit of Environmental Health Biotechnology, PG and Research Department of Zoology,
Loyola College, Chennai - 600 034, India.
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B. Velmurugan
Unit of Environmental Health Biotechnology, PG and Research Department of Zoology,
Loyola College, Chennai - 600 034, India.
Abstract
The present investigation is to assess the genotoxic potential of nickel
chloride and zinc sulphate on gill cells of silver carp Hypophthalmichthys
molitrix. Fishes were exposed in sublethal concentration of nickel chloride 5. 7
mg/1 and zinc sulphate 6.8 mg/1, and sampled at 10, 20 and 30 days. Nickel
chloride and zinc sulphate treated f"Ishes exhibited an apparent increase in
the aberration frequency and a decrease in the mitotic index as compared to
control. Acentric fragment, chromatid break, endoreduplication, chromatid
gap, centromeric fusion, ploidy, sticky plate, dicentric chromosome, clumping
and partial sticky plates were some of the abnormalities observed. The
chromosomal aberrations in the treated fishes were significant compared to
con trot
Keywords: Hypophthalmichthys molitrix:~ nickel chloride, zinc sulphate, gill
cells, chromosomal aberration
