Effects of salinity on growth performance and survival rate of Asian swamp eel Monopterus albus Zuiew, 1793 at seed nursery stage
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Abstract
This study aimed to determine the suitable salinity range for Asian swamp eel Monopterus albus Zuiew, 1793 culture under saline intrusion conditions in the Mekong Delta. The research evaluated growth performance, survival rates (SR), and feed conversion ratios (FCR) of swamp eel cultured under 4 treatments (T) with salinity levels of 0‰, 2‰, 4‰, 6‰, and 8‰, with 0‰ serving as the control. The results showed that after 45 days of culture, weight gain (WG) and daily weight gain (DWG) were highest in the T0‰ (WG: 4.3 g, DWG: 0.1 g/day); and the lowest WG and DWG were observed in the T8‰ (WG: 2.2 g, DWG: 0.05 g/day). Survival rates were high in the T0‰, T2‰, and T4‰ with a peaking at 100%, while the lowest survival rate was observed in the T8‰ (85%). The FCR was highest in the T8‰ (6.52) and the lowest in the T0‰ (2,99), with no significantly different (P > 0.05) compared to those at 2‰ (3.33) and 4‰ (3.51). These results suggest that, in addition to freshwater, aquatic environment with salinity levels up to 4‰ is suitable for the seed nursery stage of swamp eels farming.
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