The present study aimed to compare the effect of biofloc technolgoy (BFT) and outdoor open-field farming on water quality and the growth performance of the giant freshwater prawn (Macrobrachium rosenbergii) during summer (June to September, total 119 days) in South Korea. At the end of the experiment, ammonia and nitrite levels were found to be more stable in the BFT treatment than in the outdoor open-field; however, total suspended solids and nitrite tended to gradually increase. In addition, in the case of outdoor open-field farming, fluctuations in water quality were observed owing to inflow of water during the rainy season in the summer. The growth and survival rate with BFT were similar to those with outdoor open-field farming: total weight, BFT 36.7 ± 0.92 vs. outdoor 36.0 ± 1.42 kg; survival rate, BFT 75.1 ± 1.88% vs. outdoor 82.9 ± 3.23%; and feed coefficient ratio, BFT 2.7 ± 0.07 vs. outdoor 2.3 ± 0.09. In addition, BFT showed a good effect on individual growth: specific growth rate, BFT 3.9 ± 0.08 %/day vs. outdoor 3.8 ± 0.04 %/day.
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PARK et al. (2024) studied this question.
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