Effect of Water Salinity on Some Blood Parameters of Common Carp (Cyprinus carpio)

Abstract

This study was conducted to investigate the effect of high salinity on the blood parameters of common carp (Cyprinus carpio) which gradually exposed to salt concentrations of 5, 10 and 15g/liter, as well as tap water (control 0.1g/liter). 80 fish were randomly distributed to four salinity treatments with 2 replicates /treatment (10 fish / replicate) at average weight of 15 ± 3 g to study the effect of salinity on the blood parameters, which included packed cells volume(PCV), red blood cells (RBC), white blood cells (RBC) and hemoglobin (Hb). Results showed an increase in the (PCV) to 36.17, 40.15 to and 45.30% when the salinity increased to 5, 10 and 15g/l respectively, compared with the control treatment (33.14%). Hb reached 13.34, 14.56 and 15.80 mg/100 ml at the concentration of 5, 10 and 15 respectively, compared with the control treatment (12.15 mg/100ml). RBC reached 2.80, 2.93 and 3.1 × 10 6 cells/mm 3 respectively, in comparison with control (0.1 g/l), while the WBC increased to 12.88, 15.23 and 10.55 × 10 3 cells/mm 3 when the salt concentrations were 5, 10 and 15g/l respectively, compared with control (10.44 × 10 3 cells/mm 3).