Studies on the respiration of the freshwater mussel Parreysia corrugata
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The oxygen consumption of the freshwater mussel, Parreysia corrugata, was studied in relation to body size, temperature, salinity, pH, oxygen content, starvation and desiccation.
The rate of oxygen consumption was found to be inversely related to the body size when calculated on the basis of weight.
With increase of temperature from 16° to 34°C the rate of respiration incresaed by 70%.
At salinities of the external medium raised in the range from 0.1 to 0.7% NaCl, oxygen consumption diminished.
Experiments on oxygen consumption in relation to experimental pH have shown that Parreysia consumed very little oxygen at low (5.3) as well as high pH (8.3 and 9.0). The respiration appears to be normal at pH 6.0 and 7.2.
The oxygen consumption appears to be directly related to the oxygen concentration in the medium over a range from 1.0 ml/l to 5.3 ml/l.
A distinct decrease in the oxygen consumption was found when animals were kept in the laboratory in filtered tap water for 10 days. The decrease is supposed to be caused by starvation.
Desiccation appears to bring about oxygen debt in the animals which is paid back after return to the water.
KeywordsOxygen Respiration Body Size Oxygen Consumption Oxygen Concentration
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