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Table 1.

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 at pH 7.0 in the head compartment and 0 or 30 mmol l-1NH4Cl at pH 7.0 or pH 8.0 in the tail compartment

Condition
[Ammonia] (mmol l-1) in the external medium
SetCompartmentpH[NH4Cl] (mmol l-1)0 h6 h24 hpH after 24 h
Head 0.021±0.006 1.8±0.2a 7.6±0.8a,b 7.12±0.12 
 Tail 0.024±0.005 0.11±0.03 0.69±0.23a 7.02±0.11 
Head 0.021±0.005 2.3±0.3a 8.2±0.3a,b 7.06±0.08 
 Tail 30 29.7±0.8 29.5±0.7 29.4±0.8 7.03±0.07 
Head 0.023±0.004 5.0±1.2a,1 19.5±2.5a,b,1,2 7.04±0.06 
 Tail 30 31.2±0.8 30.5±0.9 28.9±1.1 7.82±0.10 
Condition
[Ammonia] (mmol l-1) in the external medium
SetCompartmentpH[NH4Cl] (mmol l-1)0 h6 h24 hpH after 24 h
Head 0.021±0.006 1.8±0.2a 7.6±0.8a,b 7.12±0.12 
 Tail 0.024±0.005 0.11±0.03 0.69±0.23a 7.02±0.11 
Head 0.021±0.005 2.3±0.3a 8.2±0.3a,b 7.06±0.08 
 Tail 30 29.7±0.8 29.5±0.7 29.4±0.8 7.03±0.07 
Head 0.023±0.004 5.0±1.2a,1 19.5±2.5a,b,1,2 7.04±0.06 
 Tail 30 31.2±0.8 30.5±0.9 28.9±1.1 7.82±0.10 

Values are means ± s.e.m. (N=5).

a

Significantly different from the 0 h value

b

significantly different from the 6 h value

1

significantly different from the corresponding set 1 value

2

significantly different from the corresponding set 2 value

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