The Company of Biologists

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
Set	Compartment	pH	[NH₄Cl] (mmol l^-1)	0 h	6 h	24 h	pH after 24 h
1	Head	7	0	0.021±0.006	1.8±0.2^{^a}	7.6±0.8^{^a},^{^b}	7.12±0.12
	Tail	7	0	0.024±0.005	0.11±0.03	0.69±0.23^{^a}	7.02±0.11
2	Head	7	0	0.021±0.005	2.3±0.3^{^a}	8.2±0.3^{^a},^{^b}	7.06±0.08
	Tail	7	30	29.7±0.8	29.5±0.7	29.4±0.8	7.03±0.07
3	Head	7	0	0.023±0.004	5.0±1.2^{^a},^¹	19.5±2.5^{^a},^{^b},^¹,^²	7.04±0.06
	Tail	8	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
Set	Compartment	pH	[NH₄Cl] (mmol l^-1)	0 h	6 h	24 h	pH after 24 h
1	Head	7	0	0.021±0.006	1.8±0.2^{^a}	7.6±0.8^{^a},^{^b}	7.12±0.12
	Tail	7	0	0.024±0.005	0.11±0.03	0.69±0.23^{^a}	7.02±0.11
2	Head	7	0	0.021±0.005	2.3±0.3^{^a}	8.2±0.3^{^a},^{^b}	7.06±0.08
	Tail	7	30	29.7±0.8	29.5±0.7	29.4±0.8	7.03±0.07
3	Head	7	0	0.023±0.004	5.0±1.2^{^a},^¹	19.5±2.5^{^a},^{^b},^¹,^²	7.04±0.06
	Tail	8	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).

Significantly different from the 0 h value

significantly different from the 6 h value

significantly different from the corresponding set 1 value

significantly different from the corresponding set 2 value

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