| Amino acid |
Protein to fat ratio |
Amino acid need of fish %
(Tscherbina and Gamygin 2006) |
| 52/12 |
45/22 |
| Indispensable |
| Lysine |
4.49 |
4.2 |
4.1 |
| Methionine |
1.45 |
1.49 |
1.0 |
| Tryptophane |
0.75 |
0.68 |
- |
| Arginine |
4.71 |
4.38 |
3.1 |
| Histidine |
1.89 |
1.76 |
0.7 |
| Leucine |
4.83 |
4.4 |
4.8 |
| Isoleucine |
3.9 |
2.6 |
3.5 |
| Phenylalanine |
3.2 |
2.9 |
2.6 |
| Threonine |
2.92 |
2.5 |
2.9 |
| Valine |
3.74 |
3.4 |
3.3 |
| Replaceable |
| Cystine * |
1.03 |
0.75 |
0.9 |
| Glycocoll |
2.9 |
2.4 |
2.1 |
| Tyrosine * |
1.4 |
1.2 |
1.1 |
|
| * - conditionally replaceable |
| Table 3: Amino acid content of experimental variants of diets for pre-spawning maintenance of sturgeon breeders for the purpose of improving the quality of fertilized hard and food roe |
