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Journal of Experimental Biology 59,267-274 (1973)
Published by Company of Biologists 1973

The Respiratory Physiology of the Marine Nematodes Enoplus Brevis (Bastian) and E. Communis (Bastian) : II. The Effects of Changes in the Imposed Oxygen Regime

H. J. ATKINSON ¹

¹ Department of Zoology, The University, Newcastle upon Tyne; Department of Pure and Applied Zoology, The University, Leeds LS2 9JT

1. The rate of oxygen consumption of individual male Enoplus brevis and E. communis was measured at 15 °C, after altering the oxygen regime experienced since the animals were collected.

2. When both E. brevis and E. communis were transferred to 35 Torr from atmospheric oxygen tensions, their oxygen consumption was only two-thirds of that of individuals maintained at this lower oxygen tension.

3. The rate of oxygen consumption of the two species at 135 Torr was unaltered by exposure for 2 h to oxygen-free sea water.

4. The results are discussed in relation to the overall influence of fluctuating oxygen regimes on the oxygen requirements of nematodes.