Document Type : Research Paper
In this study, the fluctuation of two parameters of blood glucose and cortisol hormone were investigated in different salinities in Cyprinus carpio.
Seven tanks with 100 lit. volume were used and different salinities of 0, 3, 6, 12, 15 and 18 ppm were choosen as treatments. Then, 16 specimen of common carps (each 50-90 g weight) were added to the tanks.
In periBds of 12 up to 96 hours, the blood sample was taken from each fish for further measurment of parameters.
The results showed that all fishes died at 18 ppm salinity within less than 12 hours. The blood glucose indicated high sensitivity to the higher salinity.
In this research, blood glucose had a reange of 13.5 to 321.0 mg/dc.lit and also, cortisol showed a fluctuation from 10 up to 70 µg/dc. lit and its concentration had a direct relationship with increasing the salinity.