寒冷炭酸ガス麻酔がコイ筋肉におけるATP関連化合物,pHおよびグリコ-ゲンの死後変化に及ぼす影響〔英文〕

概要

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Postmortem changes in the levels of ATP-related compounds were investigated in the muscle of carp which were kept in a container for 10h at 14°C and Pco2=80mmHg (cold-CO2 group), at 14°C under bubbling pure O2 gas (14°C-O2 group), or at 23°C under bubbling pure O2 gas (23°C-O2 group), carp which were allowed to recover from cold-CO2 anesthesia before death (CO2-recovery group), and carp netted from a rearing tank and decapitated immediately (control group). The changes in glycogen and pH were also measured in the muscle of cold-CO2, CO2-recovery, and control groups. The initial ATP, pH, and glycogen levels were low, while the IMP level was high in the cold-CO2 group compared with that in the control group. The carp anesthetized with cold-CO2 seemed to be in a different metabolic state. The ATP degradation rate was rapid at an early stage of storage, while the freshness index (K value) was high in the cold-CO2 group during storage compared with those in the control group. In the 14°C-O2 and 23°C-O2 groups, the postmortem levels of ATP-related compounds showed little difference from those in the control group. In the CO2-recovery group, the postmortem levels of ATP-related compounds, pH, glycogen, and K value also showed little difference from those in the control group. The meat quality of the carp treated with cold-CO2 anesthesia was unaffected when the carp was allowed to recover from anesthesia.
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