Evaluation the bioeconomic impact of trash fish and artificial feed on production and profitability of Mangrove Red Snapper (Lutjanus argentimaculatus) cultured in pond
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Abstract
This study examined the effects of feeding mangrove red snapper (Lutjanus argentimaculatus) with trash fish (T1) and artificial feed (T2) on bioeconomic performance and profitability in 400 m² grow-out ponds over a 6-month period. The findings revealed significant variations in fish growth after the first month, with T2 consistently exhibiting slower growth throughout the rearing period (P<0.05). Survival rate, FCR, and yield for T1 were 96.0%, 5.26, and 262.7 kg/pond, respectively, while T2 achieved 97.5%, 2.25, and 170.0 kg/pond. The total costs of rearing fish in T1 and T2 were 91.8 and 85.4 THB/m², respectively. Total revenues were 183.9 THB/m² for T1 and 119.0 THB/m² for T2, resulting in net cash returns of 92.0 and 33.6 THB/m², respectively. Both feeding strategies covered operational costs, as indicated by NPV, BCR, and IRR analyses. However, investing in T2 carried relatively higher risks, particularly in scenarios where costs increased by 20% and benefits decreased by 20%, leading to a BCR of 0.95 and a negative IRR. Overall, rearing red snapper in earthen ponds fed with trash fish appeared to be a more suitable investment option, but further study and development of artificial feed for this fish are needed for sustainable farming practices.
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