POTENSI EKONOMI BIRU PESISIR KUBU RAYA: ANALISIS PROYEKSI KELAYAKAN USAHA PENGEMBANGAN BUDIDAYA IKAN TIRUSAN (Boesemania microlepis) PADA EKOSISTEM HUTAN MANGROVE DELTA KAPUAS

As part of the Kapuas Delta region, Batu Ampar District in Kubu Raya Regency has the largest mangrove forest area in West Kalimantan Province, covering 88,853 Ha or 55.4% of the total. This area has significant potential for developing mangrove-based aquaculture. The development of aquaculture businesses in mangrove areas requires a holistic approach, considering ecological, social, and economic aspects. One type of fish currently being widely farmed (grown out) by coastal communities in Batu Ampar Village is the Tirusan fish (Boesemania microlepis). This fish has a swim bladder with a very high selling value, especially in the Chinese market. This study aims to determine the cultivation patterns and to analyze the feasibility and sensitivity of the Tirusan fish farming business under various designed scenarios. The research method uses observation and interview techniques, and the business feasibility is analyzed using NPV (Net Present Value), BCR (Benefit Cost Ratio), and IRR (Internal Rate of Return), followed by an assessment of the business's sensitivity scenarios. The research findings show that: 1) The cultivation pattern for Tirusan fish applies an extensive monoculture system with several management stages: a) Provision of Cultivation Infrastructure (Cages); b) Provision and Stocking of Tirusan Fish Fingerlings; c) Feed Management; d) Management and Maintenance; e) Fish Harvesting; f) Post-Harvest Handling; and g) Product Marketing; 2) The financial feasibility projection for the Tirusan fish farming business over a 10-year period shows positive results, making it economically and financially viable; and 3) Sensitivity analysis identifies the survival rate as a critical determinant for the financial feasibility of this aquaculture project. A lower survival rate (55% or 45%) exponentially increases the project's vulnerability, and can even render it unfeasible.