The results for TBARS analysis, a marker for the decomposition of secondary lipid oxidation products, appear also in Fig. 1. TBARS results for both the saithe dark and light muscle (Fig. 1C) showed low/no formation of secondary oxidation products up to month 6, followed by a sharp increase up to month 12, after which only the dark muscles values continued to increase. A significantly higher (p < 0.05) increase of TBARS formation appeared in the samples