Abstract
Variations of ascorbic acid content were studied during different stages of embryogenesis in the two crustaceans Cancer pagurus and Palaemon serratus. Variations in the egg volume of P. serratus were also measured at each stage of embryogenesis. The eggs appeared able to synthesize ascorbic acid during the earlier embryonic stages. Ascorbic acid changes in the crustaceans' eggs are discussed in relation to the variations of proline, chitin, glycogen and glucose already studied. Ascorbic acid appears to play an important role in the survival of eggs incubating under unfavourable environmental conditions. Before hatching, the ascorbic acid content is as high as after spawning.
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