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Installation d'une épifaune à Spirographis spallanzani Viviani, Sycon ciliatum Fabricius et Ciona intestinalis (L.) dans le port de plaisance de Lézardrieux (Côtes-du-Nord) = Settlement of epifauna of Spirographis spallanzani, Sycon ciliatum and Ciona intestinalis in the harbor of Lezardrieux
Koechlin, N. (1977). Installation d'une épifaune à Spirographis spallanzani Viviani, Sycon ciliatum Fabricius et Ciona intestinalis (L.) dans le port de plaisance de Lézardrieux (Côtes-du-Nord) = Settlement of epifauna of Spirographis spallanzani, Sycon ciliatum and Ciona intestinalis in the harbor of Lezardrieux. Cah. Biol. Mar. 18(3): 325-337
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
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    Marine

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  • Koechlin, N.

Abstract
    The immersed surface of the floating metal tanks of the newly constructed harbor at Lezardrieux is covered with a rich epifauna. The population of Spirographis spallanzani Viviani seems to be distributed over two years. There is little difference in the length of the tube and the number of segments between the one and the two year old animals but the diameter of the opening and the fixed weight increases in the older animals. Sycon ciliatum Fabricius are numerous and reach the unusual length of 70 cm long. Ciona intestinalis (L.) density exceeds 2000 animals by m SUP-2 . The description given here points out the likely reasons for such a settlement of animal populations and suggests the great interest in the study of the life cycle time of these species, living in their natural area.

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