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Fig. 4. Effects of aerial exposure on the NH3 volatilization rate (µmol day–1 g–1) of Misgurnus anguillicaudatus. Open columns represent the control condition. Filled columns represent the experimental condition. S, submerged; T, aerial exposure. Values are means + S.E.M. (N=4). *Significantly different from the corresponding control condition, P<0.05.