A closer look at the financial feasibility of aquaponics
In the Philippines, vegetables are relatively well-priced, but if catfish were produced, a venture producing 1250 kg fish, 6000 kg lettuce, and 300 kg tomato per year would have a Net-Benefit-Cost Ratio of below 1.3 after 20 years. This ratio should be higher when one considers the risks against which a farmer cannot and should not insure its production, as argued in the paper.
Depending on the species of both fish and vegetables, the quantity of nutrients coming from the former component imposes a fish volume: vegetable area ratio ranging from 1:30 to 1:100, thus the quantity of marketable fresh vegetables determines the size of an aquaponics enterprise. As a consequence, the investments in the fish component are relatively high and weigh heavily on the financial balance.
For producers to successfully adopt aquaponics, they need to consider starting first with catfish, and then, as they get to master the system’s management, they can shift to a high-value fish species for niche markets.
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