Table 2.
Biochemical composition and apparent digestibility coefficients of fish meal and Chlorella meal.
| Item | Fish meal1 | Chlorella meal2 | |
|---|---|---|---|
| Proximate composition, % dry matter | |||
| Moisture, % wet weight | 6.80 | 2.67 | |
| Crude protein | 68.21 | 57.50 | |
| Crude lipid | 9.00 | 10.20 | |
| Crude ash | 14.05 | 4.71 | |
| Crude fiber | 1.61 | 0.89 | |
| Carbohydrate (crude fiber free)3 | 0.33 | 24.0.03 | |
| Gross energy, kJ/g | 19.98 | 19.00 | |
| Lutein, mg/kg | 0.00 | 79.73 | |
| Apparent digestibility coefficient (ADC) of ingredient, % | |||
| ADC of dry matter | 81.29 | 72.94 | |
| ADC of protein | 92.62 | 87.38 | |
| Indispensable amino acids (IAA), % dry matter | |||
| Methionine | 1.65 | 0.87 | |
| Lysine | 4.44 | 2.80 | |
| Threonine | 2.42 | 2.05 | |
| Isoleucine | 2.63 | 1.89 | |
| Histidine | 1.82 | 0.93 | |
| Valine | 2.53 | 2.34 | |
| Leucine | 4.50 | 4.31 | |
| Arginine | 2.19 | 2.12 | |
| Phenylalanine | 2.33 | 2.48 | |
| ∑IAA | 24.52 | 19.80 | |
| Dispensable amino acids (DAA), % dry matter | |||
| Aspartic acid | 4.55 | 4.03 | |
| Serine | 2.13 | 1.84 | |
| Glutamic acid | 7.99 | 7.56 | |
| Glycine | 3.69 | 2.95 | |
| Alanine | 3.85 | 4.43 | |
| Cysteine | 0.33 | 0.34 | |
| Proline | 2.61 | 2.64 | |
| Tyrosine | 1.87 | 1.59 | |
| ∑DAA | 27.02 | 25.38 | |
| ∑TAA | 51.54 | 45.18 | |
| Fatty acid composition, % total fatty acids | |||
| C14:0 | 8.12 | 0.32 | |
| C15:0 | 0.55 | 0.26 | |
| C16:0 | 14.13 | 14.11 | |
| C17:0 | 0.64 | 0.31 | |
| C18:0 | 7.04 | 1.54 | |
| C20:0 | 0.18 | 0.17 | |
| C24:0 | 0.41 | 0.28 | |
| ∑SFA | 31.40 | 17.12 | |
| ∑MUFA | 21.08 | 21.25 | |
| C18:3n-3 | 0.56 | 19.23 | |
| C20:3n-3 | 0.09 | 0.00 | |
| C20:5n-3 | 15.37 | 0.00 | |
| C22:6n-3 | 21.02 | 0.00 | |
| C18:2n-6c | 1.08 | 46.90 | |
| C18:3n-6 | 0.21 | 0.15 | |
| C20:2n-6 | 0.20 | 0.00 | |
| C20:3n-6 | 0.14 | 0.00 | |
| C20:4n-6 | 1.20 | 0.00 | |
| C22:2n-6 | 7.61 | 0.00 | |
| n-3 PUFA | 37.03 | 19.23 | |
| n-6 PUFA | 10.45 | 47.05 | |
| ∑HUFA | 47.48 | 66.28 | |
∑IAA = sum of indispensable amino acids; ∑DAA = sum of dispensable amino acids; ∑TAA = sum of total amino acids; ∑SFA = sum of saturated fatty acids; ∑MUFA = sum of monounsaturated fatty acids; n-3 PUFA = sum of n-3 polyunsaturated fatty acids; n-6 PUFA = sum of n-6 polyunsaturated fatty acids; ∑HUFA = sum of highly unsaturated fatty acids.
1
Fish meal: from Superprime, TASA Fish Product Co., Ltd., Peru.
2
Chlorella meal: from Demeter Bio-Tech Co., Ltd., Wuhan, Hubei, China.
3
Carbohydrate (crude fiber free) = 100 – (Moisture + Crude protein + Crude lipid + Crude ash + Crude fiber).