| Summary: | The chemical composition of the muscle of cod varies according to the different localities. First we have a very definite difference in the chromatographic pattern of cod-muscle between cod from the southern waters (Skagerrack) and those from northern waters (Lofoten area). This difference occurred in all specimens examined, irrespective of local varieties. Secondly, the cod from the two localities can be separated in sub-groups. Cod from the Skagerack: 1. Littoral cod. 2. Deep-sea cod from the Norwegian "skjærgård". 3. Cod from the open Skagerack. Cod from the Lofoten area: a. Coastal cod (resembles Skagerack-group 1). b. Deep-sea cod (resembles Skagerack-group 2). c. Common skrei (resembles Skagerack-group 3). d. Type not characteristic. Bank cod? or Murm. cod. (This type has till now not been observed in the Skagerack). Finally the cod muscle has been hydrolysed, and the different constituents building the complex molecules or the amino-acid-group containing part of the muscle are identified.
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