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Journal of Lipid Research, Vol. 5, 369-373, July 1964
Copyright © 1964 by Lipid Research, Inc.

The effect of environmental temperature on the fatty acid composition of crustacean plankton

Tibor Farkas and Sandor Herodek

The Biological Research Institute of the Hungarian Academy of Science, Tihany, Hungary

Measurements of the iodine value made over a period of three years demonstrate a regular yearly cycle in the composition of the fat of crustacean plankton in Lake Balaton. The melting point of the lipid of the planktonic copepods remained during the whole year somewhat lower than the water temperature. The proportions of the C₂₀-C₂₂ polyunsaturated acids in the planktonic crustaceans increased with decreasing temperature and in some species exceeded the values characteristic of marine animals. In fresh-water fish, kept at room temperature and fed on freshly collected fresh-water plankton, the lipids formed in winter resembled marine fish oil.

In the crustaceans raised on algae containing no fatty acids longer than C₁₈, the C₂₀-C₂₂ acids always appeared as major components of the copepods.

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