Table 3.
Effects of dietary electrolyte balance (DEB) and dissolved oxygen levels (DO) on the apparent nutrient digestibility in trout. DEB in mEq kg−1. Parameters are expressed as %. Mean values per tank (n = 3), measured in 30 fish. Further details are provided in Methods. Pooled standard error of mean (SEM); Interaction (I); Not significant (ns) P > 0.1; *P < 0.05; **P < 0.01; ***P < 0.001.
| Parameters | DEB 200 | DEB 700 | ||||||
|---|---|---|---|---|---|---|---|---|
| Normoxia | Hypoxia | Normoxia | Hypoxia | SEM | DEB | DO | I | |
| DM | 84.4 | 86.0 | 85.7 | 87.9 | 0.18 | *** | *** | ns |
| Ash | 32.2 | 33.0 | 52.0 | 54.9 | 0.66 | *** | * | ns |
| Phosphorous | 48.6 | 47.7 | 41.9 | 42.9 | 0.85 | *** | ns | ns |
| Protein | 96.4 | 97.2 | 96.4 | 97.3 | 0.09 | ns | *** | ns |
| Lipid | 97.3 | 97.7 | 96.5 | 96.9 | 0.09 | *** | ** | ns |
| Carbohydrates | 73.4 | 77.1 | 72.7 | 77.7 | 0.35 | ns | *** | ns |
| Energy | 91.5 | 92.9 | 90.9 | 92.7 | 0.12 | * | *** | ns |