Table 2. Whole-body proximate and amino acid composition of giant gourami after a 90-day feeding trial.
Mean ± SD *.
| KP1 | KP2 | KP3 | KP4 | |
|---|---|---|---|---|
| %, dry wet basis | ||||
| Proximate composition | ||||
| Dry matter | 64.59 ± 0.16 a | 64.51 ± 0.34 a | 64.14 ± 0.33 a | 64.24 ± 0.12 a |
| Crude protein | 28.64 ± 0.28 a | 28.07 ± 0.79 ab | 28.85 ± 0.45 c | 28.66 ± 0.44 ad |
| Crude fat | 2.79 ± 0.03 a | 2.88 ± 0.02 b | 2.67 ± 0.04 c | 3.00 ± 0.02 d |
| Carbohydrate | 1.38 ± 0.01 a | 1.99 ± 0.06 b | 1.97 ± 0.09 c | 1.31 ± 0.02 d |
| Crude fibre | 0.97 ± 0.02 a | 0.68 ± 0.01 b | 0.83 ± 0.02 c | 0.95 ± 0.04 d |
| Ash | 1.63 ± 0.02 a | 1.70 ± 0.02 b | 1.54 ± 0.01 c | 2.11 ± 0.04 d |
| Energy total (kg calorie/100 g) | 144.77 ± 1.58 a | 155.48 ± 1.26 b | 157.90 ± 0.91 c | 149.60 ± 0.29 d |
| Amino acid composition | ||||
| EAA | ||||
| Leucine | 2.13 ± 0.01 a | 2.37 ± 0.01 b | 2.42 ± 0.01 c | 2.26 ± 0.01 d |
| Isoleucine | 1.13 ± 0.01 a | 1.25 ± 0.01 b | 1.38 ± 0.01 c | 1.19± 0.01 d |
| Lysine | 2.77 ± 0.01 a | 3.16 ± 0.02 b | 3.88 ± 0.01 c | 2.86 ± 0.01 d |
| Valine | 1.26 ± 0.01 a | 1.40 ± 0.01 b | 1.32 ± 0.01 c | 1.35 ± 0.01 d |
| Threonine | 1.38 ± 0.02 a | 1.49 ± 0.01 b | 1.43 ± 0.01 d | 1.48 ± 0.01 d |
| Arginine | 1.58 ± 0.01 a | 1.71 ± 0.01 b | 1.63 ± 0.01 c | 1.70 ± 0.01 d |
| Phenylalanine | 1.02 ± 0.01 a | 1.11 ± 0.01 b | 1.08 ± 0.01 c | 1.11 ± 0.01 d |
| Tyrosine | 0.80 ± 0.01 a | 0.84 ± 0.00 b | 0.83 ± 0.01 c | 0.85 ± 0.06 d |
| Methionine | 0.15 ± 0.01 a | 0.21 ± 0.01 b | 0.18 ± 0.01 c | 0.16 ± 0.01 d |
| Histidine | 0.55 ± 0.01 a | 0.56 ± 0.01 ab | 0.59 ± 0.01 c | 0.57 ± 0.01 d |
| Tryptophan | 0.08 ± 0.01 a | 1.02 ± 0.01 b | 1.08 ± 0.01 c | 0.06 ± 0.00 d |
| NEAA | ||||
| Alanine | 1.86 ± 0.01 a | 2.08 ± 0.01 b | 2.92± 0.01 c | 1.97 ± 0.01 d |
| Serine | 1.28 ± 0.01 a | 1.31 ± 0.01 b | 1.26 ± 0.01 c | 1.31 ± 0.01 d |
| Glycine | 1.58 ± 0.01 a | 1.68 ± 0.01 b | 1.61 ± 0.01 c | 1.77 ± 0.01 d |
| Proline | 1.06 ± 0.01 a | 1.16 ± 0.01 b | 1.08 ± 0.01 c | 1.16 ± 0.01 d |
| Aspartic acid | 2.71 ± 0.01 a | 3.08 ± 0.01 b | 3.79± 0.01 c | 2.77 ± 0.01 d |
| Glutamic | 4.36 ± 0.03 a | 4.92 ± 0.01 b | 4.97± 0.01 c | 4.66 ± 0.01 d |
| Cystine | 0.06 ± 0.01 a | 0.09 ± 0.01 b | 0.06 ± 0.01 c | 0.05 ± 0.01 d |
| ∑EAA | 12.68 ± 0.003 a | 15.13 ± 0.005 b | 15.82± 0.001 c | 13.61 ± 0.008 d |
| ∑NEAA | 12.91 ± 0.007 a | 14.32 ± 0.01 b | 15.69 ± 0.002 c | 13.50 ± 0.001 d |
| ∑AA | 25.59 ± 0.003 a | 29.45 ± 0.04 b | 31.51 ± 0.001 c | 27.11 ± 0.004 d |
Note: Numbers followed by different superscript letters in the same row are significantly different ( P < 0.05). Numbers with the same superscript letter in the same row show no significant difference ( P > 0.05).
*
Values represent the means of triplicate samples.