Carrying capacity of 4 ppt saline water on the production performance and water quality profile of Nile tilapia (Oreochromis niloticus) at different densities
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Increased density in fish farming can reduce the space for fish movement. The increase in density should be followed by considering the carrying capacity, which includes using an iso-osmotic environment, in this case, 4 ppt salinity. The purpose of this study is to analyze the use of 4 ppt salinity at different densities on production performance, water quality, physiological responses, and cost analysis in Nile tilapia. The experimental method was performed using Nile tilapia measuring 4.53±0.04 cm and an average weight of 1.45±0.03 g in each different density treatment, namely the control treatment of 1000 fish m-3, A 1250 fish m-3, B 1500 fish m-3, and C 1750 fish m-3, given a salinity 4 ppt with research parameters, including production performance parameters, water quality, and stress response. The results showed that the use of 4 ppt salinity in Nile tilapia can support the success of treatment C with a density of 1750 fish m-3, with water quality that is still in the optimal range for Nile tilapia and a survival rate of 95.6% with an average length of 6.6 cm, so that treatment C has the highest profit of IDR 51,500.00.
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