Effect of different salinity on growth, survival and hematology of Amur carp
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Date
2021-07
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CCSHAU, Hisar
Abstract
Effect of different salinity on growth, survival and hematology of Amur carp, Cyprinus carpio haematopterus (Linnaeus, 1758) was evaluated in a 60 days experiment. Three hundred fingerlings having average weight 8.38 ± 0.04 g, were equally distributed in 5 treatment groups: Control (0 ppt), T1 (3 ppt), T2 (6 ppt), T3 (9 ppt) and T4 (12 ppt) with 3 replicates in 500 L FRP tanks followed by complete randomized design (CRD) after acclimatization. The behavioural changes like swimming activity and appetite changes were observed in 9 ppt and 12 ppt during the experiment. The maximum survival rate was recorded in control with 100 % survivability while minimum in 9 and 12 ppt. There were no significant differences observed in water parameters like pH, Temperature and Dissolved Oxygen (DO) while parameters like ammonia, nitrite, TDS (Total Dissolved Solute) and conductivity increase significantly with increase in salinity of water. Fish growth (ADG, SGR and TWG) decline significantly (P≤0.05) from control to T4 respectively while FCR increase significantly with increase in salinity. Due to salinity stress there was significantly increase in haematological parameters including RBC, WBC, PCV and Hb. Significant changes in biochemical parameters of blood also occurs under different salinity. There was significantly decline in serum glucose level (P≤0.05) while significantly increase in Alkaline phosphatase (ALP), Aspartate amino Transferase (AST) and Alanine amino Transferase (ALT) level. The results suggested that Amur carp (Cyprinus carpio haematopterus) can be cultured ≤ 6 ppt most probably upto 5 ppt.