Fig. 2. Effects of various periods of aerial exposure on the concentrations (µmol g^-1 wet mass or µmol ml^-1; N=4) of ammonia in (A) muscle, (B) liver, (C) brain, (D) gut and (E) plasma of Monopterus albus. Values are means + S.E.M. W, in water; A, in air; ^asignificantly different from the 0 h water control value; ^bsignificantly different from the value of 24 h in air; ^csignificantly different from the value of 72 h in air; ^dsignificantly different from the value of 144 h in air.