Abstract
Urbanization activities have increased population density in urban areas so that the need for fish is increasing, to provide fish needs it is necessary to expand the cultivation area. This study aims to evaluate the minimum demand for water and land in Vertical Aquaculture in RAS on eel through production performance studies and business analysis. This study was conducted on 4 treatments and 3 replications, covering water requirements of 325 mL/day (A), 340 mL/day (B), 370 mL/day (C), and 400 mL/day (D). Elver eels weighing 17.05 ± 0.88 g were reared for 60 days in VAR. The results showed that the difference in water requirements given to eel elver gave an equally good effect between treatments for production performance parameters. The highest water efficiency in this study was produced in treatment A with consumption of water volume requirement of 0.77 L/Kg eel/day and consumption of new water requirement of 10.66 L/Kg eel/year. Aquaculture business analysis shows that VAR technology is feasible to use as an alternative eel culture technology with an R/C ratio of 3.4, a net profit of Rp. 2,730,000/year and a payback period of 1.3 years.
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