The present study was carried out to find out the changes induced by one of the stress conditions such as acidic medium exposure on some haematological and blood biochemical, parameters in the fresh water fish, Notopterus notopterus. Increase in the haemoglobin and haematocrite indicate haemoconcentration in the fish blood. Glucose, alkaline phosphatase, sodium and calcium, protein, BUN, creatinine, triglycerides, enzymes such as SGOT and SGPT were decreased in the fish N.notopterus exposed to acidic condition. The changes in the environmental factors such as acidic condition cause stress to the fish which may bring disturbance in the blood parameters effecting the survival of fish.
The changes in some blood biochemical parameters were studied in the freshwater fish N. notopterus under saline exposure for a longer period of 30 days. The blood biochemical parameters are glucose, protein, triglycerides and cholesterol. All these parameters exhibited increased level except of blood glucose which remained unchanged as observed after the termination of saline exposure. Thus it indicates that although fish survives and able to tolerate extreme saline condition as there was no mortality during the exposure period. The increase of blood biochemical parameters can be considered as a kind of saline stress response particularly on lipid derivatives.
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