Abstract
1. 1. The swimming crab, Ovalipes punctatus, was used during the summer and winter months of 1980 for respiratory studies. 2. 2. The oxygen consumption showed that the crabs had a circadian rhythm with a periodicity of ca. 24 hr, the crabs being mainly active at night (up to eight times higher then the value recorded during the day). 3. 3. The mean oxygen consumption for O. punctatus (60 g live mass: 121 μg O 2/g per hr; 15 g live mass: 195 μg O 2/g per hr) agreed favourably with values quoted for the Brachyura. 4. 4. The Q 10 values range from 1.61 to 4.50 and were dependent on temperature (at 15, 20 and 25°C) but not on body mass. 5. 5. During starvation there was a marked decline in the oxygen consumption of the crabs, which stabilized after 10–12 days.
Published Version
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