EVALUATION OF OPTIMUM SALINITY FOR REARING OF JITADA (LATES CALCARIFER) FINGERLINGSS.D. Patil and Amitkumar P. Pandey
A study was conducted to determine optimum salinity requirement for rearing of Jitada (Lates calcarifer) fingerlings. Jitada fingerlings (average weight of 2.0 ± 0.11 g and average length of 5.95±0.08 cm) were reared in different salinities viz, o, 5, 10, 15, 20,25, 30 and 35 gL-1 for 90 days in plastic pools (200 L capacity each). In each plastic pool, 100 L of required saline water was filled. The fish were subjected to eight treatments with three replicates each were carried out during the experiment. The fingerlings were stocked @ five numbers per plastic pool and fed ad-libitum with Conchostracans (macro-zooplankton). Conchostracans were collected from natural habitat of Jitada fingerlings. Significantly,higher (P <0.05)-1 percentage gain in weight (1.56 %day-1) were obtained for Jitada fingerlings reared in 10 gL-1 salinity. However, there was no significant difference (p < 0.05) in growth and survival of Jitada fingerlings reared in 5 and 10 gL-1 salinities. ANOVA did not show significant difference in growth of Jitada fingerlings reared in freshwater and salinities above 20 gL-1. Survival of Jitada fingerlings reared for in different salinities did not differ significantly (P > 0.05) and ranged between 73.3 to 86.7 per cent.
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