Plasma sodium, chloride, osmolality and glucose levels and maximal gill Na+,K+-ATPase activity of Arctic char Salvelinus alpinus acclimated to freshwater or seawater for up to 96 h
| . | FW . | SW 24 h . | SW 48 h . | SW 96 h . |
|---|---|---|---|---|
| Sodium (mequiv. l-1) | 147.0±2.6 | 173.8±3.4* | 181.1±2.9*,† | 181.8±3.7*,† |
| Chloride (mequiv. l-1) | 129.0±1.8 | 151.0±2.2* | 164.6±3.3*,† | 162.1±3.7*,† |
| Osmolality (mmol kg-1) | 284.4±2.1 | 324.1±1.9* | 343.3±4.4*,† | 343.3±5.7*,† |
| Glucose (mmol l-1) | 4.63±0.21 | 4.38±0.30 | 4.74±0.27 | 4.51±0.23 |
| Gill Na+,K+-ATPase (μmol mg-1 protein h-1) | 0.24±0.56 | 0.28±0.08 | 0.23±0.05 | 0.52±0.10*,†,‡ |
| . | FW . | SW 24 h . | SW 48 h . | SW 96 h . |
|---|---|---|---|---|
| Sodium (mequiv. l-1) | 147.0±2.6 | 173.8±3.4* | 181.1±2.9*,† | 181.8±3.7*,† |
| Chloride (mequiv. l-1) | 129.0±1.8 | 151.0±2.2* | 164.6±3.3*,† | 162.1±3.7*,† |
| Osmolality (mmol kg-1) | 284.4±2.1 | 324.1±1.9* | 343.3±4.4*,† | 343.3±5.7*,† |
| Glucose (mmol l-1) | 4.63±0.21 | 4.38±0.30 | 4.74±0.27 | 4.51±0.23 |
| Gill Na+,K+-ATPase (μmol mg-1 protein h-1) | 0.24±0.56 | 0.28±0.08 | 0.23±0.05 | 0.52±0.10*,†,‡ |
Levels for freshwater char are pooled since there were no significant differences between the 24, 48 and 96 h sample groups. Values are means± s.e.m.; N=8 for SW 24, 48 and 96 h groups, N=24 for the pooled FW group
Significantly different from pooled freshwater (FW; control) value
significantly different from seawater (SW; 32‰) 24 h group
significantly different from SW 48 h group