Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Efficiency of water use of an integrated fish/vegetable co-culture system.

Abstract

Fish and vegetable production were linked in a recirculating water system designed to achieve a high degree of efficiency of water use for food production in addition to functional and technological simplicity. The experiment was carried out in North Carolina, USA. Hybrid tilapia were grown in tanks associated with biofilters (sand beds) in which tomatoes were grown. The effect of four biofilter volume (BFV)/fish rearing tank volume ratios on water use efficiency was evaluated. Results are discussed. Water use efficiency for total energy production (fish plus fruit) did not significantly differ with biofilter volume. Economy of water use for total protein production (fish plus fruit) decreased significantly with increasing BFV/tank ratio. The component ratios of the system may be manipulated to favour fish or vegetable production according to local market trends or dietary needs, and thus may have economic potential in areas of limited water supply and high demand for quality food.