With pandemic-related lockdowns and ageing farmers putting pressure on the Philippines’ food system, researchers at BFAR are embracing urban aquaponics to shore up the islands’ food security.
“We’re looking at solar-powered urban aquaponics as an innovative way to ensure food security,” said Dr Joseph Rayos, senior aquaculturist at the Philippines’ Bureau of Fisheries and Aquatic Resources (BFAR).
Dr Rayos explained that the pandemic has revealed structural weaknesses in the food system. Urban aquaponics could form part of the “new normal” approach to food production. In theory, raising resilient fish like carp, tilapia and catfish with vegetables would provide households with a year-round food source and additional income stream, making families more food secure.
The BFAR chose aquaponics because it could address the existing challenges in the Philippines. The closed systems can be deployed in densely populated cities. From a sustainability standpoint, using urban spaces to produce food conserves arable land. Aquaponics also uses less water than conventional agriculture. In terms of production outputs, plants like lettuce, tomatoes and bell peppers tend to grow faster in aquaponic set-ups. Since the plants can use nutrients from fish waste as they grow, there’s no need for fertiliser.
For the solar-powered systems championed in the Plant, Plant, Plant programme, Rayos and his colleagues are hoping to keep construction costs low. Small systems that take up 1m² of floor space begin at $52 and can produce up to 75 catfish and 54 heads of lettuce per cycle. Larger systems could cost up to $2,000 and could support multiple families within a community. For Dr Rayos and the BFAR, the system is a win-win.