We determined aerial and aquatic oxygen uptake rates (ṀO2) of Periophthalmodon schlosseri at rest and after exhaustive exercise at 30°C. Resting ṀO2 in air (3.16 ± 0.10 [SE] μmol/g/hr) was significantly higher than that in air saturated water (2.41 ± 0.06 μmol/g/hr). When the fish was placed in air after 2 min exhaustive exercise, ṀO2. Immediately increased about 2.5 times, thereby repaying oxygen debt of 5.0 μmol/g. In contrast, ṀO2 failed to show any significant elevation from the resting level as long as the fish was confined in water after exercise. However, when the fish was subsequently emerged, ṀO2 did increase above the resting level, amounting to an excess oxygen uptake of 5.5 μmol/g. These results demonstrated that the gas transport system of P. schlosseri is better adapted to air breathing and the mode of adaptation limited the capability for water breathing.
|ジャーナル||Journal of Experimental Zoology|
|出版ステータス||出版済み - 8月 1 1999|
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