The Company of Biologists

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
Set	Compartment	pH	[NH₄Cl] (mmol l^-1)	0 h	6 h	24 h	pH after 24 h
1	Head	7	30	28.7±0.5	29.8±0.4^{^a}	38.1±3.1^{^a},^{^b}	6.91±0.08
	Tail	7	30	30.1±0.6	29.9±0.5	29.7±0.6	7.05±0.06
2	Head	7	30	29.3±0.9	33.7±1.8^{^a}	42.6±2.8^{^a},^{^b}	6.93±0.07
	Tail	8	30	30.8±0.4	30.1±0.9	29.2±0.9	7.85±0.08
3	Head	8	30	29.8±1.0	31.6±1.2^{^a}	45.1±1.3^{^a},^{^b}	7.28±0.06
	Tail	8	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
Set	Compartment	pH	[NH₄Cl] (mmol l^-1)	0 h	6 h	24 h	pH after 24 h
1	Head	7	30	28.7±0.5	29.8±0.4^{^a}	38.1±3.1^{^a},^{^b}	6.91±0.08
	Tail	7	30	30.1±0.6	29.9±0.5	29.7±0.6	7.05±0.06
2	Head	7	30	29.3±0.9	33.7±1.8^{^a}	42.6±2.8^{^a},^{^b}	6.93±0.07
	Tail	8	30	30.8±0.4	30.1±0.9	29.2±0.9	7.85±0.08
3	Head	8	30	29.8±1.0	31.6±1.2^{^a}	45.1±1.3^{^a},^{^b}	7.28±0.06
	Tail	8	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).

Significantly different from the 0 h value

significantly different from the 6 h value

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