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Seasonal study of the lipid composition in different tissues of the common octopus ( Octopus vulgaris )
Author(s) -
Sieiro Ma Pilar,
Aubourg Santiago P.,
Rocha Francisco
Publication year - 2006
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.200500322
Subject(s) - octopus (software) , phospholipid , polyunsaturated fatty acid , biology , composition (language) , fatty acid , homogeneous , ovary , medicine , endocrinology , biochemistry , food science , chemistry , computational chemistry , linguistics , philosophy , physics , membrane , thermodynamics
Seasonal variation of octopus ( Octopus vulgaris ) lipid composition was investigated in four tissues: arm, mantle, ovary and digestive gland. A non‐homogeneous fat distribution was observed, with the digestive gland exhibiting a higher ( p <0.05) lipid content than the other tissues. The ovary showed a higher ( p <0.05) fat content than both muscle tissues, reaching its highest ( p <0.05) value in winter. Neutral lipids – free fatty acids (FFA), triacylglycerols, and sterols (ST) – exhibited their highest ( p <0.05) concentrations in the digestive gland and their lowest ( p <0.05) values in muscle tissues. The phospholipid (PL) content of the ovary was the highest ( p <0.05) of all tissues analysed, with the PL content also being significantly ( p <0.05) higher in the digestive gland than in arm and mantle. The concentrations of most lipid classes (FFA, PL and ST) exhibited a seasonal variation. The fatty acid composition showed a remarkable difference between the digestive gland and all other tissues analysed. Thus, the digestive gland exhibited higher ( p <0.05) contents in monounsaturated fatty acids and also lower ( p <0.05) contents in both saturated (SFA) and polyunsaturated (PUFA) fatty acids. The highest mean values in SFA and PUFA were observed in ovary and muscle tissues, respectively. A seasonal effect was observed for SFA and PUFA.