Table 2.
Growth performance indices, survival, feed utilization indices, and whole-body proximate composition of whiteleg shrimp (Litopenaeus vannamei) fed powdered Sargassum polycystum- and nucleotides-supplemented diets during the winter season.
| Parameters | Treatments * | |||
|---|---|---|---|---|
| T1 | T2 | T3 | T4 | |
| Growth performance indices and survival | ||||
| Initial weight (g) | 12.04 ± 0.02 | 12.05 ± 0.01 | 12.06 ± 0.02 | 12.02 ± 0.02 |
| Final weight (g) | 15.28 ± 0.01 d | 15.62 ± 0.04 b | 15.46 ± 0.02 c | 15.82 ± 0.02 a |
| Weight gain (g) | 3.24 ± 0.02 d | 3.57 ± 0.02 b | 3.40 ± 0.04 c | 3.81 ± 0.02 a |
| ADG (g/shrimp/day) | 0.058 ± 0.0 d | 0.064 ± 0.00 b | 0.061 ± 0.00 c | 0.068 ± 0.00 a |
| SGR (%/shrimp/day) | 0.425 ± 0.001 d | 0.463 ± 0.002 b | 0.444 ± 0.005 c | 0.491 ± 0.003 a |
| Condition factor | 0.583 ± 0.003 c | 0.700 ± 0.006 b | 0.690 ± 0.006 b | 0.753 ± 0.003 a |
| Survival rate (%) | 75.00 ± 1.44 b | 82.50 ± 1.44 a | 80.00 ± 1.44 a | 84.17 ± 0.83 a |
| Feed utilization indices | ||||
| FCR | 3.91 ± 0.043 a | 3.14 ± 0.051 c | 3.42 ± 0.035 b | 2.78 ± 0.021d |
| PER | 0.637 ± 0.009 d | 0.793 ± 0.015 b | 0.727 ± 0.009 c | 0.897 ± 0.009 a |
| PPV, % | 46.25 ± 1.37 b | 46.27 ± 2.46 b | 37.80 ± 1.22 c | 64.74 ± 1.07 a |
| Energy utilization (EU %) | 26.77 ± 0.58 b | 25.52 ± 1.48 b | 19.54 ± 0.88 c | 35.14 ± 0.82 a |
| Whole-body proximate composition | ||||
| Dry matter (%) | 20.43 ± 0.02 c | 21.16 ± 0.01 b | 21.79 ± 0.02 a | 21.73 ± 0.08 a |
| Crude protein (%) | 73.45 ± 0.32 a | 70.20 ± 0.59 b | 68.92 ± 0.34 c | 73.35 ± 0.20 a |
| Ether extract (%) | 3.19 ± 0.12 a | 2.58 ± 0.14 b | 2.07 ± 0.11 b | 2.54 ± 0.26 b |
| Ash (%) | 16.05 ± 0.31 a | 14.55 ± 0.37 bc | 13.88 ± 0.35 c | 15.04 ± 0.18 ab |
| Fibre (%) | 4.86 ± 0.03 d | 5.24 ± 0.05 c | 5.46 ± 0.05 b | 5.63 ± 0.04 a |
| Carcass energy (Kcal/100g) | 444.42 ± 0.97 a | 420.26 ± 3.55 b | 408.27 ± 2.83 c | 437.68 ± 2.84 a |
* Treatments; T1 = Control; T2 = 500 mg/kg Nucleotides; T3 = 500 mg/kg Sargassum polycystum powdered; T4 = 500 mg/kg Nucleotides + 500 mg/kg Sargassum polycystum powdered. Means within the same row with different superscript letters (a–d) are significantly different (p < 0.05).