Abstract

Nereis succinea populations of the Kiel Flord (Baltic Sea) show marked annual changes in energy content and main body components (glycogen, lipid, protein). Maximum values of body components and energy content were recorded in spring and early autumn, when food supply and other environmental circumstances are favourable. During the first half of the year the food value of the worm (determined as energy content of fresh weight) is higher than during the second half. Biomass values reveal a similar dynamic pattern. They are markedly influenced by spawning.

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