The estimation of free sugars in skeletal muscle of codling (Gadus callarias) and herring (Clupea harengus)

Data relating to free sugars in the skeletal muscle of fishes are scarce. Moreover, many of the early reductometric studies (e.g. MacPherson, 1932) lacked specificity and it is now well-established that large excesses of amino nitrogen such as occur in extracts of fish muscle, cause serious in- accuracy with such procedures (Hewitt, 1938; Strange, Dark & Ness, 1955). Tarr (1954) has