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Fig. 2. Representative traces of air-breathing cycles in O. lacepedii.
Inspired (VI) and expired (VE) volumes
were obtained by subtracting a' from b' and a' from
c', respectively. Note that VE can be obtained only
in (A), when the inspired air was kept intact in the buccal cavity until
expiration. In (B), the fish released several bubbles prior to expiration.
Body mass of fish used for A and B were 60.6 g and 81.1 g, respectively.