Evaluation of Nile tilapia in monoculture and polyculture with giant freshwater prawn in biofloc technology system and in recirculation aquaculture system

摘要

Biofloc technology system (BFT), recirculation aquaculture system (RAS) and polyculture promote efficient use of water, area and nutrient recycling, which are essential practices for sustainable aquaculture development. The aim of this study was to evaluate the growth, feed efficiency, biofloc composition and water quality of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) in monoculture and polyculture with giant freshwater prawn Macrobrachium rosenbergii (De Man, 1906) in BFT and RAS, over a period of 30?days. Fish ( n ?=?128; 7.29?±?0.67?g) were distributed randomly in 16 experimental tanks (8 fish/tank). Prawn ( n ?=?96; 0.50?±?0.09?g) were allocated in 8 experimental tanks (12 prawn/tank) in a polyculture. The experimental design was completely randomized with four treatments with four replicates each, in a factorial design 2?×?2 (BFT and RAS vs. monoculture and polyculture). The experimental diet (28% of digestible protein; 3100?kcal?kg~(?1)of digestible energy) was used both to fish and prawn in BFT and RAS. There was significant effect ( p ?