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Biol Bull 123: 86-93. (August 1962)
© 1962 Marine Biological Laboratory
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SITES OF OXYGEN UPTAKE IN OCHETOSTOMA ERYTHROGRAMMON LEUCKART & RUEPPELL (ECHIUROIDEA)

S. H. CHUANG 1

1 Dept. of Zoology, University of Singapore, Singapore

1. The oxygen consumption of Ochefostoma erythrogrammon averaged 0.0692 cc. per hour per gram of wet weight of fixed tissue.

2. After blockade of the anus the oxygen uptake did not diminish, indicating that the cloaca and hindgut have no significant respiratory function.

3. Both trunk and proboscis took up oxygen after separation, the latter consuming oxygen averaging 17% of the combined uptake of trunk and proboscis.

4. The relative importance of cloaca and hindgut, trunk, and proboscis as respiratory organs was discussed.

5. The oxygen consumption of O. erythrogramon was compared with related animals.






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