Seagrape (Caulerpa lentillifera) was cultured in concrete ponds at Ly Son Island
The culture model in concrete ponds was performed at Ly Son Island (Quang Ngai province, middle of Vietnam). After each culture batch in this model (35 days), seaweeds developed well with seedling productivity of 4.60 ± 0.79 kg raw seaweed/frame 90x80cm; growth rate of 1.78 ± 0.26 %/day; proportion of vertical seaweed body of 63.0 ± 3.7%; proportion of 5-cm vertical seaweed body of 29.2 ± 1.9% (edible seaweeds); average harvestable yield of 1.35 ± 0.15 kg/frame 90x80cm.
The high seedling productivity of Seagrape (Caulerpa lentillifera) in the concrete ponds
The culture model in floating cages was performed at Phu Quy Island (Binh Thuan province, middle of Vietnam). After each culture batch in the floating cages (60 days), seaweeds developed well with seedling productivity of 0.7 ± 0.068 kg raw seaweed/piece (20-25 pieces/line suspended inside cage) and growth rate of 3.74 ± 0.19 %/day.
The red seaweed (Kappaphycus alvarezii) was cultured in floating cages at Phu Quy Island
Finally, a big amount of commercial seaweed product was achieved from both culture model in the concrete ponds and in the floating cages. These results provide a scientific platform towards large-scale farming of these commercial seaweeds in Vietnam.
The commercial-size product of the red seaweed (Kappaphycus alvarezii) using the floating cages
The information from the national project “Assessment of the resources and potential exploitation, aquaculture of commercial seaweeds at the offshore Islands in Vietnam”, project code: KC.09.05/16-20.
Do Anh Duy