The Company of Biologists

Table 3.

The influence of exposure to high environmental ammonia (HEA, nominally 2000μmol l^–1, measured=2515±153μmol l^–1) for up to 7 days on plasma total ammonia and cortisol concentrations in live trout in Series 6

	Water [ammonia] (μmol l^–1)	Plasma [ammonia] (μmol l^–1)	Plasma [cortisol] (ng ml^–1)
Control (N=10)	33±5	97±15	10±1
20h HEA (N=16)	2319±26^{^*}	1183±81^{^*}^,^{^†}	163±19^{^*}
7 day HEA (N=10)	2260±60^{^*}	1079±43^{^*}^,^{^†}	135±17^{^*}

	Water [ammonia] (μmol l^–1)	Plasma [ammonia] (μmol l^–1)	Plasma [cortisol] (ng ml^–1)
Control (N=10)	33±5	97±15	10±1
20h HEA (N=16)	2319±26^{^*}	1183±81^{^*}^,^{^†}	163±19^{^*}
7 day HEA (N=10)	2260±60^{^*}	1079±43^{^*}^,^{^†}	135±17^{^*}

The water ammonia concentrations measured at the time of blood sampling are also reported

There were no significant differences (P>0.05) between 20 h and 7 day values

P<0.05 relative to corresponding control value

†

P<0.05 relative to simultaneous water ammonia concentration

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