Surbhi*
Department of Zoology, Parwati Science College, B. N. Mandal University, Madhepura, Bihar, India
Received : 22nd April, 2020 ; Revised : 27th May, 2020
Abstract– Pesticides also affect non-target organisms. These affects may be physiological and behavioural which may be manifested by death & sterility. With the discovery of new uses of cadmium, its presence in the environment has increased. Cadmium is used in the production of television picture tube phosphorus, nickel cadmium batteries, motor oils, curing agents for rubber, fungicides, phosphate fertilizers, stearate stabilizers for plastics (polyvinyl chloride) and shields for nuclear reactors. Cadmium is used primarily for electroplating other metals or alloys to protect them against corrosion and in the manufacture of low melting point alloys or solders. Fish is generally appreciated as one of the healthiest and cheapest source of protein and it has amino acid compositions that are higher in cysteine than most other sources of protein. Heavy metals like copper, iron and zinc are essential for fish metabolism while some others such as mercury, cadmium, arsenic and lead have no known role in biological systems. Behavioural changes of hyper-activity and jumping observed in the Cadmium poisoned fishes in all tanks were due to skin irritation, respiratory rate impairment and coughing induced by the toxicants on the fishes especially. Weak swimming and reduced equilibrium (swimming upside down) were symptoms of a dying fish. Death resulting from acute CdSCO, might be due to increased heart failure, hypertension, gastric haemorrhage, convulsion, paralysis, heart failure and suffocation. Cadmium chloride poses toxic elements on the carp fish Catla catla which is evident
by the findings of present.
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