Profiles of New Zealand Snapper (Pagrus auratus) Postmortem Metabolism as Affected by Acclimated Temperature and Postmortem Storage Temperature |
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| Authors: | A.R. Jerrett R.A. Law A.J. Holland S.E. Black. |
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| Affiliation: | The authors are with the Seafood Research Unit, New Zealand Institute for Crop &Food Research Limited, P.O. Box 5114, Nelson, New Zealand. Direct inquiries to author Jerrett (E-mail: ). |
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| Abstract: | ABSTRACT: Chemical anesthesia (AQUI-STM) was used to harvest tank-reared snapper ( Pagrus auratus ) from late summer (19.6 °C) and winter (11.9 °C) acclimated populations in a "rested" state. Carcasses were stored in seawater at temperatures between 2 and 20 °C to investigate the effects of acclimation and storage temperature on the postmortem metabolic rate. Contour plots of postmortem muscle pH [lactic acid] and adenosine triphosphate/inosine monophosphate measurements revealed critical temperature transitions: 16 to 18 °C (coinciding with seasonal behavioral changes) and 4 to 6 °C (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. |
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| Keywords: | Pagrus auratus white muscle acclimation temperature storage temperature eye surface potential |
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