Abstract
A practical closed recirculation aquaculture system (CRAS) for seed production has been developed by Fisheries Research Agency (FRA) in Yashima Laboratory. This system consists of a culturing tank, reservoir tank (with filter treatment by collection nets), foam separation unit, biofiltration unit, UV disinfection unit, water level control tank, and recirculation pump. The foam separation unit is the most important equipment in CRAS for seed production. This is because CRAS has a high ability to remove suspended matter in the water by using microbubbles. Optimum control conditions of CRAS for seed production have been shown efficient biofilter materials and recirculation rate in biofilter and total system. Seed production using CRAS is more advanced than the flow-through system. Using CRAS, the advantages of low salinity seed production of tiger puffer, Takifugu rubripes, and high density culturing (20,000 fishes/kL of 25 mm in TL) for red sea bream, Pagrus major, seed production were demonstrated. Preventing diseases such as VNN was proved in seed production for red-spotted grouper, Epinephelus akaara, using CRAS in Kagawa Prefectural Fisheries Experimental Station.
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Yamamoto, Y. (2017). Seed Production Systems. In: Takeuchi, T. (eds) Application of Recirculating Aquaculture Systems in Japan. Fisheries Science Series. Springer, Tokyo. https://doi.org/10.1007/978-4-431-56585-7_9
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DOI: https://doi.org/10.1007/978-4-431-56585-7_9
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