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Table 2.

Ammonia concentration in the external medium in the head or body compartments of the chamber in which P. schlosseri was exposed for 24 h to 50%SW containing 30 mmol l-1 NH4Cl at pH 7 or pH 8 in both the head and tail compartments

Condition
[Ammonia] (mmol l-1) in the external medium
SetCompartmentpH[NH4Cl] (mmol l-1)0 h6 h24 hpH after 24 h
Head 30 28.7±0.5 29.8±0.4a 38.1±3.1a,b 6.91±0.08 
 Tail 30 30.1±0.6 29.9±0.5 29.7±0.6 7.05±0.06 
Head 30 29.3±0.9 33.7±1.8a 42.6±2.8a,b 6.93±0.07 
 Tail 30 30.8±0.4 30.1±0.9 29.2±0.9 7.85±0.08 
Head 30 29.8±1.0 31.6±1.2a 45.1±1.3a,b 7.28±0.06 
 Tail 30 31.0±1.1 29.8±0.9 28.5±0.8 7.88±0.09 
Condition
[Ammonia] (mmol l-1) in the external medium
SetCompartmentpH[NH4Cl] (mmol l-1)0 h6 h24 hpH after 24 h
Head 30 28.7±0.5 29.8±0.4a 38.1±3.1a,b 6.91±0.08 
 Tail 30 30.1±0.6 29.9±0.5 29.7±0.6 7.05±0.06 
Head 30 29.3±0.9 33.7±1.8a 42.6±2.8a,b 6.93±0.07 
 Tail 30 30.8±0.4 30.1±0.9 29.2±0.9 7.85±0.08 
Head 30 29.8±1.0 31.6±1.2a 45.1±1.3a,b 7.28±0.06 
 Tail 30 31.0±1.1 29.8±0.9 28.5±0.8 7.88±0.09 

Values are means ± s.e.m. (N=5).

a

Significantly different from the 0 h value

b

significantly different from the 6 h value

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