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
1Head73028.7±0.529.8±0.4a38.1±3.1a,b6.91±0.08
Tail73030.1±0.629.9±0.529.7±0.67.05±0.06
2Head73029.3±0.933.7±1.8a42.6±2.8a,b6.93±0.07
Tail83030.8±0.430.1±0.929.2±0.97.85±0.08
3Head83029.8±1.031.6±1.2a45.1±1.3a,b7.28±0.06
Tail83031.0±1.129.8±0.928.5±0.87.88±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