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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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