Influence of salinity on nursery-phase whiteleg shrimp (Litopenaeus vannamei) reared in a biofloc system

ABSTRACT

This study aimed to determine the effect of salinity on the survival rate and growth of whiteleg shrimp postlarvae reared using biofloc technology. The experiment included four treatments at different salinities: 10‰, 15‰, 20‰, and 25‰. Each treatment consisted of three replicates. Shrimps were reared using biofloc technology with a C/N ratio of 15:1 and additional sugar treatment. Shrimps were cultured in 500 L-tanks with a stocking density of 2,000 inds/m³. The initial weight of shrimp was 0.006 g. After 30 days of rearing, the growth rates of shrimp differed significantly among treatments (P < 0.05). The results showed that the length (4.54 ± 0.06 cm), weight (0.79 ± 0.04 g), and survival rate (91.5 ± 1.0%) were significantly greater (P < 0.05) for the shrimp reared in the treatment salinity of 15‰ compared to the other treatments. Therefore, rearing whiteleg shrimp at a salinity of 15‰ using biofloc technology is appropriate.

KEYWORDS:

• Whiteleg shrimp
• biofloc
• salinity
• survival rate

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study belongs to the Vietnamese ODA F-2 project “Green Technology Innovation for Aquaculture,” which is funded by the Can Tho University Improvement Project VN14-P6, supported by a Japanese ODA loan.