EFFECT OF HEAVY METAL POLLUTION ON FRESH WATER FISHES CYPRINUS CARPIO
Sheik Dawood Mahaboob Nisha*
ABSTRACT
This investigation was aimed to estimate the toxic impact of selected heavy metals such as Cadmium, Copper and
Zinc on the biochemical changes in certain selected tissues of freshwater fish, Cyprinus carpio. The species of
fresh water fish Cyprinus carpio was collected from local fresh water lake Kurukkupatti lake, Salem, District,
Tamil Nadu. The measurement of heavy metls like, cadmimum, copper and zinc was done by absorption
spectrophotometry. Biochemical changes in total protein, carbohydrate and lipid content was estimated by the
method standard procedures. The results of quantitative analysis of cadmium, copper and zinc in different tissues
such as gills, liver, kidney and muscle of both control and experimental fish. In the fishes exposed to cadmium,
zinc and copper the level of carbohydrate in liver, muscle and kidney was found to be 1.64 ± 0.06, 1.38 ± 0.02,
1.33 ± 1.01%, 1.55 ± 0.09, 1012 ± 0.03 and0.68 ± 0.08% and was 1.22 ± 0.10, 1.18 ± 0.03 and1.05 ± 0.02%
respectively. The total protein content of these tissues from the animal treated with cadmium, copper and zinc was
in the order of 16.21 ± 0.20, 6.45 ± 0.04 and 3.33 ± 0.08%, 32.00 ± 0.00, 12.40 ± 0.05 and 6.60 ± 0.04% and 21.02
± 0.08% in liver, 11.44 ± 0.06 in kidney and 9.62 ± 0.03% in muscle respectively.
Keywords: Heavy metals, cadmium, copper, zinc Cyprinus carpi.
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