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Observations on growth ofFlustra foliacea (Bryozoa) from Helgoland waters

Beobachtungen über das Wachstum vonFlustra foliacea (Bryozoa) aus den Gewässern um Helgoland

Helgoländer wissenschaftliche Meeresuntersuchungen volume 27, pages 263–267 (1975)Cite this article

Kurzfassung

Die Kolonien des MoostierchensFlustra foliacea treten bei Helgoland in großer Abundanz, und zwar vorwiegend in Wassertiefen von 1–20 m, auf. Das Wachstum der Art zeigt einen exponentiellen Verlauf, wobei in aufeinanderfolgenden Jahren unterschiedliche Wachstumsintensitäten, deren Ursachen jedoch noch unklar sind, verzeichnet worden sind. Quantitative Angaben über den Wachstumsverlauf bei verschiedenen Altersklassen, die einen Bereich von 8 Jahren umfassen, werden mitgeteilt.

Summary

  1. 1.

    The growth rates ofFlustra foliacea has been estimated for 8 years by evaluation of previous growth increments.

  2. 2.

    The growth of the colonies was found to be exponential.

  3. 3.

    Intra-annual variation in growth was noticed. This was very conspicuous between the 5-year and 6-year class.

  4. 4.

    The equation W =−1.692 l1.905 can be employed to assess the growth rate of this species in Helgoland waters.

  5. 5.

    The intensity of settlement of epizoites was less when compared with other localities in the North Sea.

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Authors and Affiliations

  1. Biologische Anstalt Helgoland (Meeresstation), Helgoland, Federal Republic of Germany

    N. R. Menon

  2. College of Fisheries, 575002, Mangalore, India

    N. R. Menon

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  1. N. R. Menon
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Menon, N.R. Observations on growth ofFlustra foliacea (Bryozoa) from Helgoland waters. Helgolander Wiss. Meeresunters 27, 263–267 (1975). https://doi.org/10.1007/BF01611695

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  • DOI: https://doi.org/10.1007/BF01611695

Keywords

Helgoland Marine Research

ISSN: 1438-3888

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