High density recirculating aquaculture system with greenhouse pond for California perch (Micropterus salmonides) and culture

Abstract:

For the research of an economically closed recirculating aquaculture system, this study designed a new system integrating greenhouse, new water purification equipment and aerobic machines such as wave aerator. A running test farming California perch (Micropterus salmonides) with the period of 4 months was conducted for evaluating the performance of the system. During the period of culture, the water quality, fish growth and market prospect of the system were analyzed. The obtained results showed that after 4 months of farming, the fish density increased from 2.12 kg/m³ to 5.86 kg/m³, and the survival rate was 95.1%. Results from the water quality monitoring test showed that the average concentrations of ammonia nitrogen, nitrite nitrogen and dissolved oxygen (DO) were 0.66±0.35, 0.19±0.089 and 6.64±0.25 mg/L, respetively; the water temperature and pH were maintained at 27.34-28.00℃ and 6.73-7.34. Economic analysis showed that the annual profit was up to 174.2 thousand Yuan per 667 m², the payback period was 2.75 years, implying the high economic value of the new system. This study demonstrated that the constructed greenhouse pond recirculating aquaculture system is an economically feasible system with the advantages of high efficiency, energy saving and emission reduction.