Effect of supplementary lighting on nutrient recovery of Ocimum basilicum and fishes in a polyculture aquaponic system

The effects of prolonged photoperiod (additional night lighting) were investigated on the production Ocimum basilicum (lemon basil) and fish/crayfish raised in a nutrient film technique aquaponic system. Hybrid lemon fin barb red claw crayfish juveniles co-cultured with O. subjected to 12 h ambient natural daylight additional 0, 4, 8, lighting for 14 weeks (two batches 7 each). water quality parameters performance characteristics fish/crayfish/plant evaluated, uptake (nitrogen, phosphorus, potassium) system by three organisms was also measured. fish growth showed no significant differences (p > 0.05) all measured across treatments. body proximate nitrogen, phosphate, potassium (NPK) composition not significantly different Similarly, there difference NPK plant that measured, except % height gained h-light treatment (403.2 ± 26.0%) which < higher than other treatments cycles. Hence, this study demonstrated varying supplementary has effect basilicum, hybrid barb, crayfish. This study, therefore, suggests should be considered as it does improve nor polyculture