Table 2: Plasma (a) and blood (b) composition of flounder chronically adapted to SW or FW.
(a) Plasma composition.

SWFW

Osmolality (mosmo/kgH2O)302.62 ± 3.32285.2 ± 3.35**
Mg2+ (mmol/liter)4.7 ± 0.182.8 ± 0.35**
Cl (mmol/liter)141.4 ± 1.65124.4 ± 2.21**
Ca2+ (free) (mmol/liter)1.77 ± 0.0271.8 ± 0.039
Na+ (mmol/liter)151.48 ± 2.39146.92 ± 2.38
K+ (mmol/liter)2.7 ± 0.0382.74 ± 0.13

(b) Blood composition.

SWFW

Hematocrit (Hct) %25.82 ± 1.329.78 ± 1.7
RBC × 1012/L2.258 ± 0.12.562 ± 0.2
Hgb g/L74.4 ± 3.684.2 ± 5.4

Independent samples t-test was used to assess differences between chronically adapted FW and SW flounder and between experimental and time matched controls at each time point, * , **    .