Abstract
SummaryThe seasonal variation of key bioactivities in ethyl acetate extracts of chub mackerel (Scomber colias), an underutilised fish species, was evaluated through a complete monthly sampling. The phenolic content had a seasonal variation, ranging from 39 ± 5 mg GAE/100 g ww (February) to 340 ± 6 mg GAE/100 g ww (October). Ferric reducing antioxidant power (FRAP) increased from 1.3 ± 0.4 μmol Fe2+ Eq/g ww (January) to 10.3 ± 0.1 μmol Fe2+ Eq/g ww (September). ABTS had no antioxidant activity between June and December, being the highest value in February, 64.3 ± 6.3 μmol Trolox Eq/100 g ww. For phenolic content and FRAP, there was a strong seasonality, which was similar to that of the lipid content. Therefore, correlations were high, being R2 0.95 for lipid vs. phenolic contents. Anti‐inflammatory activity did not show large changes throughout most part of the year, remaining high in the 70–80% of COX‐2 inhibition. This finding and the seasonality of the antioxidant properties warrant further research.
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