Heavy Metal Levels In Three Major Carps (Catla catla, Oreochromis niloticus and Cyprinus carpio Var.communis) From The Lake Of Thanjavur District
Keywords:
Major carps, cadmium, chromium and lakesAbstract
The present study was conducted to determine heavy metal (cadmium and chromium) concentrations in gills, liver, skin and muscles of three fish species (Catla catla, Oreochromis niloticus and Cyprinus carpio var. communis) from three stations viz. Varan lake, Red lake and Amni lake in Thanjavur District. Heavy metal concentrations varied significantly depending upon the type of fish tissues and locations. The concentrations of cadmium and chromium differed significantly (P?0.05) among three fish organs and three sites and non-significantly between the three fish species. Fish liver appeared to have significantly higher tendency for the accumulation of cadmium and chromium (3.27±1.57 and 2.97 ±1.57 µgg?1), while gills had minimum concentrations (1.05±0.53 and0.92±0.088 µgg?1) of these metals. Generally, Catla catla showed higher levels of metal concentrations than Oreochromis niloticus and Cyprinus carpio var. communis. Metal contamination was highest in Red lake probably due to inclusion of more effluents from sewage water.
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