Profiles of New Zealand Snapper (Pagrus auratus) Postmortem Metabolism as Affected by Acclimated Temperature and Postmortem Storage Temperature

摘要

Chemical anesthesia (AQUI-S~(TM)) was used to harvest tank-reared snapper (Pagrus auratus) from late summer (19.6℃) and winter (11.9℃) acclimated populations in a "rested" state. Carcasses were stored in seawater at temperatures between 2 and 20℃ to investigate the effects of acclimation and storage temperature on the postmortem metabolic rate. Contour plots of postmortem muscle pH [lactic acid] and adenosine triphos-phate/inosine monophosphate measurements revealed critical temperature transitions: 16 to 18℃ (coinciding with seasonal behavioral changes) and 4 to 6℃ (consistent with cold injury). DC eye surface potential (ESP) was evaluated as a noninvasive indicator of tissue-temperature interactions and showed similar patterns of critical temperature transitions.