Table 4.
Amino acid composition (g/100 g) of the fishmeal (FM) feed and krill meal (KM) feed and of collagen extracted from skeletal muscle of Atlantic salmon fed the experimental feeds
(Mean values)
| Amino acid/organic acid | FM feed | KM feed | FM collagen* | KM collagen* |
|---|---|---|---|---|
| Alanine | 1·56 | 1·35 | 0·07 | 0·07 |
| Arginine | 1·87 | 1·68 | 0·03 | 0·03 |
| Asparagine | 2·71 | 2·46 | 0·04 | 0·04 |
| Cysteine + cystine | 0·48 | 0·43 | <0·01 | <0·01 |
| Glutamic acid (total) | 7·14 | 6·69 | 0·05 | 0·06 |
| Glycine | 1·54 | 1·27 | 0·19 | 0·20 |
| Histidine | 0·70 | 0·68 | 0·01 | 0·01 |
| Hydroxyproline | 0·13 | 0·17 | 0·04 | 0·03 |
| Isoleucine | 1·32 | 1·29 | 0·01 | 0·01 |
| Leucine | 2·56 | 2·40 | 0·02 | 0·02 |
| Lysine | 3·03 | 2·84 | 0·02 | 0·02 |
| Methionine | 1·47 | 1·45 | 0·01 | 0·01 |
| Ornithin | <0·05 | <0·05 | ND | ND |
| Phenylalanine | 1·61 | 1·52 | 0·01 | 0·01 |
| Proline | 2·26 | 2·09 | 0·06 | 0·06 |
| Serine | 1·58 | 1·46 | 0·03 | 0·03 |
| Taurine | 0·17 | 0·13 | ND | ND |
| Threonine | 1·54 | 1·43 | 0·02 | 0·02 |
| Tryptophan | 0·35 | 0·36 | ND | ND |
| Tyrosine | 1·14 | 1·09 | 0·01 | 0·01 |
| Valine | 1·45 | 1·36 | 0·02 | 0·01 |
*
Considering 0·66 % collagen in Atlantic salmon muscle(41). Determinations were performed in triplicate and data correspond to mean values. Standard deviations were in all cases lower than 5 %. Aspartic acid and hydroxylysine were not detected.