Free Sugars and Sugar Phosphates in Muscle of Chill‐Stored Aquarium Cod (Gadus callarias)

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Abstract
SUMMARY: The concentrations of ribose, glucose, ribose 1‐phosphate, glucose 1‐phosphate, glucose 6‐phosphate, fructose monophosphate and fructose 1,6‐diphosphate in muscle extracts of aquarium‐kept cod were determined and their changes followed throughout a period of chill‐storage. A comparison is drawn between these results and those obtained previously from a similar study on trawled cod, and the probable enzymic processes responsible for the changes are discussed. It is observed that on the whole, rested cod muscle contains considerably more free sugars and sugar phosphates than trawled cod muscle and it is concluded that muscle from rested fish is more liable to “brown” than is that from exhausted fish.

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