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360332 
Journal Article 
Bioaccumulation of cadmium in tissues of Cirrihna mrigala and Catla catla 
Jyotsna, S; Kant, K; Sharma, HB; Rana, KS 
2008 
22 
3 
411-414 
Increasing industrialization, along with the violation of effluent disposal norms, has caused heavy contamination of water bodies. Fish and other aquatic biota in the vicinity of industrial areas is a good indicator for gauging the level of pollution. Heavy metals like Cadmium (Cd), Chromium (Cr), Zinc (Zn), Copper (Cu), Plumbum (Pb), Nickel (Ni), and Mercury (Hg) have proven to be persistent pollutants. Though present in traces heavy metals, being lipophilic, tend to bioaccumulate and biomagnify. Their accumulation in biotic tissues causes toxic effects. The present study is undertaken to gauge the accumulation of Cadmium in fish tissue, when live fish is subjected to sublethal dose of Cadmium for a period of 15 to 60 days in controlled environments of Aquaria. The tissues from liver, gill, muscle and kidney were subjected to Atomic Absorption Spectroscopy (AAS) and electrophoresis for assessing the amount of Cadmium accumulated in various tissues at the end of 15 days and then after 60 days. Atomic absorption spectrum showed that the tissues of Mrigala were more resistant to accumulation of Cadmium than those of Catla. Maximum accumulation was in the gills and liver, followed by muscles, while minimum accumulation was seen in kidneys. In the above estimation we found that tissues of Mrigala were more resistant to accumulation of Cadmium than those of Catla. These fish are used as bio-indicators because they tend to accumulate heavy metals and show their effects. As these fish are extensively used for human consumption, this finding urges either greater regulation for industrial effluent discharge, or exploration of alternative fish species that accumulate less pollutant. 
animal tissues; biological indicators; cadmium; chromium; copper; gills; indicator species; industrial effluents; industrial sites; industrialization; kidneys; lead; liver; mercury; muscles; nickel; pollutants; polluted water; sublethal effects; water pollution; water quality; zinc; Catla catla; Cirrhinus mrigala; fishes; Catla; Cyprinidae; Cypriniformes; Osteichthyes; vertebrates; Chordata; animals; aquatic organisms; aquatic animals; eukaryotes; Cirrhinus; bioaccumulation; water composition and quality; Aquatic Biology and Ecology (MM300); Water Resources (PP200); Pollution and Degradation (PP600); Industrial Wastes and Effluents (XX400); Physiology and Biochemistry (Wild Animals) (YY400) (New March 2000)