Farming of GIFT Tilapia is gaining prominence in Indian aquaculture. Indian aquaculture is based on various salinity ranges, so a study was carried out to asses the performance of GIFT tilapia at different salinities for growths, survival & Feed conversion (FCR) Nellore, Andhra Pradesh. The trail was carried out at 0-3ppt, 6-9ppt, 12-15ppt, 20-25ppt, >30ppt, using 28/4 feed till the fish grew to 50gms & 24/3 till the harvest. All trails were done on a stocking density of 4pcs/m2 over a period of 180days. The Fish of 5 + 0.5gms were stocked from the nurseries after due acclimatization to the respective salinities as the fishes couldn't survive sudden change in salinities.
Gift tilapia showed the best growth rates upto 623gms, high survival rates of 95% & FCR as good as 1:1.2 at 0ppt. There wasn't much difference in growths, survivals & FCR upto 9 ppt. The growth rates 298gms, survival 81% & the FCR 1:1.6 were poor above 12ppt, Above 20ppt the results were very poor Growth 193gms, survival 68% & FCR 1:2.4 and the fish couldn't survive above 30ppt even on slow acclimatisation. The results indicate that the optimal salinity for the culture of GIFT tilapia is 0-3ppt.