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Abstract
This study evaluated the effects of different stocking densities on growth performance, survival rate, and size variation coefficient of whiteleg shrimp (Litopenaeus vannamei) in a recirculating aquaculture system (RAS). Postlarval shrimp (PL10) were nursed at four densities: 500 shrimp/m³ (NT1), 1000 shrimp/m³ (NT2), 1500 shrimp/m³ (NT3), and 2000 shrimp/m³ (NT4), with each treatment replicated three times. After 28 days of rearing, water quality parameters remained within the optimal range for whiteleg shrimp growth. However, nursing density significantly affected shrimp growth (p<0.05). Growth rates were the highest in NT1 and NT2 (0.034 and 0.033 g/day, respectively), with statistically significant differences compared to NT3 and NT4 (p<0.05). Similarly, survival rate declined with increasing density (p<0.05), with the highest rate observed in NT1 (96.0%) and the lowest in NT4 (80.0%). In contrast, the coefficient of size variation increased steadily from NT1 to NT4 (1.49–6.08%), and the differences were statistically significant (p<0.05) when comparing NT1 and NT2 with NT3 and NT4. The study results recommend rearing whiteleg shrimp in a RAS at a density of ≤ 1000 shrimp/m³ to optimize growth, survival rate, and size uniformity within the shrimp population.
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