Larval rearing of giant freshwater prawn (Macrobrachium rosenbergii) in bioflocs systems supplemented with difference carbon sources

Abstract

The study was carried out to evaluate the effects of three carbon sources (sugar, rice flour and wheat flour) added at C:N ratio of 15 on growth and survival rates of larvae and postlarvae of giant freshwater prawn (Macrobrachium rosenbergii), in comparison with a control treatment of no carbon source added. The larvae were cultured at the density of 60 individuals/litter in 500 litter composite tank with the salinity of 12‰. Larval prawn were fed with Artemia nauplius for the first 4 days, and supplemented with artificial feed (Lansy and Fripak) from day 5 onward. After 30 rearing days, prawn in the treatment with sugar addition had the highest growth (body length of PL 10 was 1.32 ± 0.08 cm), survival rate (59.3±17.6%) and yield (36.0±11.0 PL/L), which were statistically different from other treatments (p<0.05). Growth and survival rates of prawn in treatments of rice flour and wheat flour addition were higher but not significantly different compared with the control treatment.