Fig. 2. Concentrations (mmol l^-1) of ammonia in water samples collected from the branchial or cutaneous surfaces of the air-facing side or the water-facing side of Anabas testudineus immersed in water and anaesthetized for 15 min on land (control; C) or exposed to terrestrial conditions for 24 h followed with 15 min of anesthetization on land (T). ^*Significantly different from the corresponding control condition.