The effect of different low salinities on growth, feed conversion ratio, survival rate and profit of Asian seabass cultivation

Asian seabass (Lates caicarifer) is one of marine fish that has a high selling value. Therefore, the development of Asian seabass cultivation technology in freshwater media and low-salinity artificial media is important for the fish farming industry in Asia-Pacific (including Indonesia) so that it can be cultivated on land far from coastal areas. The purpose of this study was to analyze the effect of different low salinities on growth, survival rate (SR) and feed conversion ratio (FCR) of Asian seabass cultivation. This research used Asian seabass seeds with sizes ranging from 7.03 to 12.52 cm (total length) and 5.55 to 21.52 g (weight) per fish which were reared in fibre tanks for 42 days with a fish density of 50 fish per m3. We used salinity treatments of 0.5 ppt (A), 5 ppt (B) and 10 ppt (C). The research results showed that treatment B (5 ppt) generated the highest Asian seabass growth (SGR in weight 1.51% per day). However, the different salinity treatments had no statistically significant impact on SGR (in weight and length), SR, FCR and RC ratio (p > 0.05). The polynomial growth model is proven can be used to estimate the growth of Asian seabass with R2 above 95%.