Effect of Mercuric Nitrate on the Chromosomes of Channa punctatus (Bloch, 1793)
Effect of Mercuric Nitrate on the Chromosomes of Channa punctatus (Bloch, 1793)
Date
2003
Authors
N.P, Ansy Mathew
Jahageerdar, Shrinivas
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
The effect of different doses (0.019, 0.038 and 0.075 ppm) of mercuric nitrate on the
chromosomes of Channa punctatus was studied. The karyotype was done by standard
colchicine, potassium chloride, acetomethanol and air-drying geimsa staining technique. It
was observed that the percentage of Total Metaphase spreads with Chromosomal Aberrations
(T.M.C.A.) increased with the increasing concentration levels. Mercuric nitrate induced
structural chromosomal aberrations included breaks, fragments, dicentric and ring type
chromosomes. The study revealed that 120 h of exposure in mercuric nitrate at concentration
levels as low as 0.019 ppm induced chromosomal aberrations in fish.
Description
Keywords
Karyotype, mercuric nitrate, Channa punctatus
Citation
Fishery Techn 40(2):77-82