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Biol Bull 133: 600-605. (December 1967)
© 1967 Marine Biological Laboratory
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ASPECTS OF OXYGEN UPTAKE IN MESOCHAETOPTERUS TAYLORI, A TUBE-DWELLING POLYCHAETE

JORGE A. PETERSEN 1 and KJELL JOHANSEN 2

1 Friday Harbor Laboratories and Department of Zoology, University of Washington, Seattle, Washington
2 Department of Physiology, University of Saomacr Paulo, Brasil

1. Oxygen uptake, VO2, in M. taylori has been studied as a function of external oxygen availability. VO2 dropped linearly as external PO2 declined.

2. The rate of PO2 decline inside normal tubes of M. taylori during tidal exposure indicates that the oxygen supply is nearly exhausted during an average 3-hour tidal exposure.

3. A comparison of oxygen tensions in interstitial water and tube water during tidal exposure revealed that the tube is impermeable to water and oxygen. This finding was confirmed by direct laboratory experiments.

4. The distribution and survival of M. taylori are discussed in relation to the results obtained.






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Copyright © 1967 by the Marine Biological Laboratory.