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Anaerobic Metabolism in the Posterior Adductor Muscle of the Common Mussel Mytilus edulis L. in Response to Altered Oxygen Tension and Temperature

Alanine, glutamate, and succinate accumulated in the posterior adductor muscle of Mytilus edulis L. when subjected to combinations of hypoxia (40-50 and 80 mm Hg) and altered temperatures (22 C and 10 C after acclimation to the field ambient temperature of 15 C). The accumulations were greater at the lower of the two oxygen tensions. The time courses of the metabolite accumulations and subsequent declines were different for animals held at 10 C and at 22 C. The results support the hypothesis that anaerobic and aerobic pathways can operate simultaneously in the tissues of Mytilus. Aspartate declined in response to hypoxia, and a role in anaerobic metabolism is indicated.