Hatching eggs of red nifi tilapia in the incubator with water recirculation system in different salinities R Aulia (1), L Ruliaty (1) and M Soleh (1)
(1) Research Center for Fishery, National Innovation and Research Agency, Indonesia
Abstract
The research aims to determine the effect of using different salinities for hatching eggs of red nifi tilapia in the incubator with a closed water recirculation system. Eggs were hatched in salinity of 0 ppt, 1 ppt, 5 ppt and 10 ppt, with three replications for each treatment. The stocking density used for each replicate was 1,750 grain/L. After six days of the incubation period, the larvae were reared in the same salinity for 4 weeks. The stocking density used was 1,000 individuals/m3. The results of the hatching rate in 0 ppt salinity were 74%. The results of the hatching rate with 1 ppt (73%) and 5 ppt (69%) salinity were not significantly different, while at 10 ppt (32%) the results were significantly different. The results of rearing larvae in 0 ppt salinity showed the highest survival rate (75%). The use of salinity 1 ppt, 5 ppt and 10 ppt respectively resulted in a survival rate of 70%, 55% and 49% (p <0.05). The use of 1 ppt salinity in hatching tilapia eggs can be done as an initial adaptation step in seed production for brackish water tilapia.
