Changes in sugar phosphate and lactate concentration in trawled cod (Gadus callarias) muscle during frozen storage

The concentrations of glucose 1-phosphate, glucose 6-phosphate, fructose monophosphate, fructose 1,6-diphosphate, pentose phosphate and lactate have been measured in the muscle of trawled cod. The effects on these compounds of storage in ice during the immediate post mortem period, of freezing at different rates pre- and post-rigor and of storage at three sub-zero temperatures for over a year have been determined.