Effect of Toxic Heavy Metal Cadmium on the Hematological Parameters in the Common Carp (Labeo Rohita)
Author : Saravanan K, Jegan S, Latha S and Pavithra D
Abstract :
Heavy metals are persistent contaminants in the environment that come to the forefront of dangerous substances such as cadmium, lead, mercury, copper and zinc. It causes serious health hazards to human, animals and environments. For the past twenty years considerable attention has been focused on the heavy metals and their derivatives in the aquatic environment. These metals are containing highly toxicant stable substances which play on vital role in the environmental pollution. The industrial process involving fossil fuel combustion, cement production, electroplating, tanneries and dying units. Cadmium is an extremely toxic metal commonly found in industrial workplaces. Cadmium is used extensively in electroplating although the nature of the operation does not generally lead to over exposures. Cadmium is also found in some industrial paints and many represent a hazard when sprayed. Cadmium is also presents in the manufacturing of some types of batteries. It does not degrade by breaking down to a less toxic form. Metals are non-biodegradable and are considered as major environmental pollutants causing cytotoxic mutagenic and carcinogenic effects in animals. Haematological parameters and physiological profiles can be useful indicators of the physiological disturbances in animals and so can be crucial in providing vital information on the general well-being of fish and considered evaluation of blood cells, blood biochemistry as useful for the diagnosis of diseases. Blood cell indices (RBC, WBC and DLC counts) are good indicators of systemic response to external stimulus and any changes are therefore reflected in their morphology and distribution in the blood.
Keywords :
Heavy metals, toxicity, Indian major carps, haematological parameters
