Journal of National Fisheries University

PISSN : 0370-9361

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Journal of National Fisheries University Volume 61 Issue 1
published_at 2012-09

Effect of Hypoxia on Oxygen Uptake in the Black-lip Pearl Oyster Pinctada margaritifera

クロチョウガイの酸素摂取に及ぼす低酸素の影響
Odawara Kazusi
Sone Ken-ichi
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Descriptions
Oxygen uptake in the black-lip pearl oyster Pinctada margaritifera was examined with the direct measurement method of ventilation volume at 27 ℃ . The ventilation volume maintained the same level as that (0.385 l/min/kgTW: total weight) under normoxic condition until the oxygen partial pressure (Po_2) decreased to 115.1 mmHg, then it increased to 0.677 l/ min/kgTW (1.8 times the normoxic ventilation volume) at 22.0 mmHg. The oxygen utilization maintained the same level as that (3.7%) under normocic condition until Po_2 decreased to 115.1mmHg, then it increased to 15.0% at 9.9 mmHg. The amount of oxygen uptake maintained the same level as that (0.068 ml/min/kgTW) under normoxic condition until Po_2 decreased to 61.6 mmHg, then it decreased when Po_2 further declined.
Creator Keywords
black-lip pearl oyster
hypoxia
oxygen uptake
oxygen utilization
ventilation volume