Fatty acid composition and parasitism of European sardine (<i>Sardina pilchardus</i>) and anchovy (<i>Engraulis encrasicolus</i>) populations in the northern Catalan Sea in the context of changing environmental conditions.

This is more evident for sardine, which according to assessments made by GFCM (2017 ), has seen a negative trend in landings and acoustic biomass estimates since 1994 in GSA 6.

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This may be related to a decrease in primary production, since a recent study in a coastal area of the northern Catalan Sea showed that most of the phytoplankton groups there presented a decreasing trend in abundance, which could be associated with a reduction in nutrient availability ( Nunes et al. , 2018 ).

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