Table 1. Measured nutrient content of frozen fish (Feed A, control) and three pelleted feeds (Feeds B-D; two sizes for each type).
| Proximate nutrient composition* | A | Bs † | Bb ‡ | Cs † | Cb ‡ | Ds † | Db ‡ |
|---|---|---|---|---|---|---|---|
| Pellet size (mm) | n.a. | 5.0 | 9.0 | 5.0 | 8.0 | 6.0 | 9.5 |
| ME (MJ/kg) | 13.39 | 15.42 | 15.63 | 14.99 | 14.85 | 14.26 | 14.19 |
| Dry matter (%) | 25.16 | 94.27 | 91.75 | 92.17 | 93.10 | 92.84 | 89.91 |
| Crude protein (%) | 18.6 | 48.40 | 46.53 | 45.44 | 46.08 | 44.91 | 41.81 |
| Crude fat (%) | 2.46 | 18.10 | 17.70 | 19.90 | 18.30 | 13.00 | 12.90 |
| Crude fibre (%) | n.d. | 2.22 | 1.07 | 2.16 | 1.58 | 1.73 | 2.07 |
| Crude carbohydrate (%) | n.d. | 11.05 | 13.71 | 8.78 | 10.33 | 16.03 | 14.32 |
| Crude ash (%) | n.d. | 9.85 | 10.00 | 14.00 | 13.94 | 11.86 | 11.61 |
| Lysine (%) | n.d. | 2.75 | 2.87 | 2.95 | 2.88 | 3.11 | 2.42 |
| Methionine (%) | n.d. | 1.36 | 1.32 | 1.10 | 1.14 | 0.78 | 0.65 |
| Cysteine (%) | n.d. | 0.76 | 0.66 | 0.64 | 0.67 | 0.50 | 0.43 |
*, Nutrient content is given on wet matter basis.
†, Small pellet size was fed from 107dph to 152dph.
‡, Big pellet size was fed from 147dph to 168dph.
Metabolisable Energy (ME) was calculated according to the equation: ME (MJ/kg dry matter) = -3.064 + 34.82*X1 + 17.21*X2 + (18.52–31.2*X4)*X3 where; X1 = crude fat (g/g d.m.); X2 = crude protein (g/g d.m.); X3 = crude carbohydrate (g/g d.m.); X4 = crude fibre (g/g d.m.) [83].
n.d. = not determined.
n.a. = not applicable.