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The component fatty acids of the lipids of some species of marine and freshwater molluscs

Published online by Cambridge University Press:  11 May 2009

Doris Gardner  and
J. P. Riley
Doris Gardner
Affiliation:
Department of Oceanography, The University of Liverpool, P.O. Box 147, Liverpool L BX.
J. P. Riley
Affiliation:
Department of Oceanography, The University of Liverpool, P.O. Box 147, Liverpool L BX.
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Extract

The component fatty-acid patterns of the triglycerides, phospholipids and, in some instances, sterol esters of a number of aquatic molluscs have been determined. The species examined include several of marine origin (Chlamys opercularis, Crepidula fornicata, Mytilus edulis, Neptunea antiqua, Patella vulgata and Pecten maximus) and one of freshwater origin (Anodonta sp.). The marine species contained considerable proportions of highly unsaturated acids of the C and C series (eg. 20:5 and 22:5) which are characteristic of the lipids of most aquatic plants and animals. In general, the relative percentages of 18:1,20:1 and 20:4 (5,8,11,14) were greater in the lipids of the marine gastro-pods than in those of the pelecypods. The differences between the fatty-acid distributions of the Anodonta sp. and marine members of the pelecypoda are analogous to those existing between other freshwater and marine animals. Studies were made of the seasonal variations in the relative proportions and fatty-acid compositions of the triglycerides and phospholipids in P. vulgata. The relative proportions of 20:4 (5,8,11,14) and 20:5 in the triglycerides rose abruptly from minimum values in January to maximum values in March and thereafter declined slowly. These changes were mainly compensated by inverse variations in the proportions of saturated and oleic acids. In contrast to the triglycerides there appears to be no significant seasonal differences in the fatty acid patterns of the phospholipids.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 52 , Issue 4 , November 1972 , pp. 827 - 838
Copyright
Copyright © Marine Biological Association of the United Kingdom 1972

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