Increasing The Stocking Density of Grouper Nurseries for Aquabusiness Efficiency in Recirculating Aquaculture System (RAS) with Bioremediation

Belinda Astari (Study Program of Aquaculture Science, Graduate School, IPB University, Bogor, Indonesia)
Tatag Budiardi (Department of Aquaculture, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia)
Suko Ismi (Research Center for Fishery, Research Organization for Earth and Maritime, National Research and Innovation Agency, Cibinong-Bogor, Indonesia)
Irzal Effendi (Department of Aquaculture, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia)
Yani Hadiroseyani (Department of Aquaculture, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia)

HAYATI Journal of Biosciences
Vol. 30 No. 2 (2023): March 2023

Water quality improvement was carried out by means of recirculation and bioremediation systems in grouper nurseries with high stocking density, thereby increasing production performance. The goal of this study was to evaluate the effectiveness of aquabusiness by analyzing the rise in grouper nursery stocking density using RAS and bioremediation systems. The test parameters consist of production performance, blood glucose levels, physic-chemistry-biology of water quality, and business efficiency based on productivity and business analysis. Treatment of 1,000 fish/m3 increased survival, blood glucose levels, total bacteria, Vibrio spp., ammonia, nitrite, and all productivity parameters. But it lowers all growth parameters, pH, and dissolved oxygen values. The recirculation system with bioremediation at up to 1,000 fish/m3 of stocking boosted the profit by 2.64 times. and 14.97% more efficient than 500 fish/m3 which could not be matched by the high production performance.