Table 1.
Characteristics of the treatments used based on different stocking densities, in 35 days of the experiment
| Treatment 1 | Stocking density | Number of shrimp in the rearing tank (150 L) | No. | WE (daily) |
|---|---|---|---|---|
| 0.5–1% WE | SD1 | 12 | 0.308 g/L | Treatment 1 |
| 0.5–1% WE | SD2 | 24 | 0.616 g/L | Treatment 2 |
| 0.5–1% WE | SD3 | 36 | 0.924 g/L | Treatment 3 |
| 0.5–1% WE | SD4 | 48 | 1.23 g/L | Treatment 4 |
Table 2.
Growth and nutritional performance of P. vannamei reared under different stocking densities in a biofloc system for 5 weeks
| Parameters | SD1 | SD2 | SD3 | SD4 |
|---|---|---|---|---|
| FBW (g) | 9.60±0.53 a | 9.34±0.44 a | 8.25±0.55 b | 7.01±0.66 c |
| BWG (g) | 5.75±0.53 a | 5.49±0.45 a | 4.40±0.55 b | 3.16±0.66 c |
| SGR (%/day) | 2.60±0.16 a | 2.53±0.13 a | 2.17±0.19 b | 1.70±0.27 c |
| FCR | 1.20±0.11 c | 1.27±0.09 c | 1.69±0.22 b | 2.34±0.55 a |
| FE (%) | 83.92±7.73 a | 78.99±6.50 a | 59.88±7.54 b | 44.59±9.29 c |
| SR (%) | 97.22±4.30 a | 95.83±3.72 a | 90.74±1.43 b | 88.19±2.84 c |
Figure 1.
Biochemical activity of P. vannamei hemolymph including glucose (Glu. A), triglyceride (Tg. B), and cholesterol (Chol. C) under the influence of different stocking densities at the end of the experimental period (35 days)
Figure 2.
Immunity activities in the hemolymph of P. vannamei including lysozyme (Lys. A), and phenoloxidase (PO, B), under the influence of different stocking densities at the end of the experimental period (35 days)
Figure 3.
Metabolic enzyme activities (A: ALP, B: ALT, C: AST) in the hepatopancreas of P. vannamei at the end of the experimental period under the influence of different stocking densities at the end of the experimental period (35 days)
Figure 4.
Antioxidant enzyme activities (A: CAT, B: GPx, C: SOD) in the hepatopancreas of P. vannamei at the end of the experimental period under the influence of different stocking densities at the end of the experimental period (35 days)