Abstract:The respiratory behaviour of Clarias lazera under different conditions was investigated.
In water saturated with air but with the fish allowed access to the surface (Fig. 2) the respiratory movements were seen to increase before it surfaced. Once the fish had settled at the bottom of the aquarium, however, a marked drop in the frequency occurred (Fig. 4): The rate gradually built up, reaching a certain maximum before a revisit to the surface was made.
At low oxygen concentrations but again with the fish allowe… Show more
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