Observations on the respiration of Australorbis glabratus and some other aquatic snails.

T. Brand,M. O. Nolan,Elizabeth Rogers Mann

Published 1948 in The Biological Bulletin

ABSTRACT

1. A study of the rate of oxygen consumption of nine species of pulmonate snails and eight species of operculate snails showed that the pulmonates had consistently a higher metabolic level than the operculates if specimens of equal weight were compared.2. In both groups, the intensity of oxygen consumption decreased with increasing size of the specimens if referred to unit weight, but remained about constant if referred to relative surface. The oxygen/surface relationship held true both in inter- and intra-specific comparisons and was especially close in the latter case.3. Australorbis glabratus was able to maintain an approximately steady rate of oxygen consumption over a wide range of oxygen tensions.4. The oxygen consumption of Australorbis glabratus increased with rising temperature in the range of 0.3 to 37° C., but 41° C. was lethal. The temperature relationship calculated according to Arrhenius' equation gave within the tolerated temperature range a straight line. A good fit to Krogh's normal curve...

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