The effect of intertidal habitat on seasonal lipid composition changes in blue mussels,Mytilus edulisL., from the White Sea

Abstract

The lipid composition of blue mussels Mytilus edulis L. living under different environmental conditions (in the intertidal zone and in aquaculture) was studied to detect origin-related differences in seasonal modifications of lipids, and their fatty acid composition in gills and digestive glands. In early May, the gills and digestive glands of intertidal mussels contained higher amounts of total lipids, chiefly phospholipids and sterols, which appear to perform a protective function as maintenance of membrane integrity. Seasonal modifications in lipid composition of both intertidal and aquaculture mussels were related to environmental factors (mainly low temperature), reproductive processes and food availability. We show that seasonal changes in membrane lipid composition of both intertidal and aquaculture mussels reflect the process of membrane lipid remodelling (namely changes in phosphatidylethanolamine proportion and in the fatty acid composition of phospholipids) required for homeoviscous adaptation in low-temperature conditions. In particular, the unsaturation index and chain fluidity index of phospholipids increased in gills and digestive glands of mussels collected in early May and in November. Similar seasonal changes in the triacylglycerol levels and its fatty acid composition were observed in gills and digestive glands of both intertidal and aquaculture mussels collected in late May and August.

Changes in lipid composition and lipid peroxidation products content in the freshwater mussel Anodonta cygnea L. under cadmium effect

“…Changes in the fatty acid composition of A. cygnea under cadmium experimental effects reflect the features of the fatty acid composition in freshwater mussels. It is known that the predominant polyunsaturated fatty acids in the lipids of marine mussels (including Mytilus edulis) are n-3 PUFAs (mainly eicosapentaenoic 20:5n-3 and docosahexaenoic 22:6n-3 acids) (Fokina et al, 2013;Fokina et al, 2018). The fatty acid composition of A. cygnea was characterized by the dominance of n-6 PUFAs and monounsaturated 20:1 fatty acids.…”

Lipidomic insights into the immune response and pearl formation in transplanted pearl oyster Pinctada fucata martensii

“…Lipids are the central structural membrane components of organisms (15), act as an energy source (16) and precursors of secondary messengers and transcription factors (17), as well as are involved in reproduction and sexual maturation (18), immunological responses (19), environmental adaptation (20) and signaling (21). Lipidomics-based studies on bivalves have been increasing steadily, particularly when applied to investigations on reproduction (22,23), larval development (24)(25)(26), as well as the impact of climate change (27,28), ocean acidification (29), and host-pathogen interactions (30-32) on bivalve production.…”