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Cultivation ofLaminaria hyperborea in situ and in continuous darkness under laboratory conditions

Kultivierung vonLaminaria hyperborea in situ und im Dauer-Dunkel unter Laboratoriumsbedingungen

Kurzfassung

Zwei- und dreijährige Exemplare der BraunalgeLaminaria hyperborea wurden bei Helgoland auf untermeerische Zuchtstationen in 2 und 6 m Wassertiefe gebracht. In 2 m Tiefe wurde die maximale Wachstumsrate in der ersten Maihälfte erreicht, in 6 m Tiefe während der ersten Junihälfte. Verglichen mit der im Juli erreichten Thallusgröße der Pflanzen in 2 m Tiefe, erreichten die Pflanzen in 6 m Tiefe mindestens 75 % der Phylloidfläche, aber nur 1/3 der Stiellänge. Dunkelgehaltene Exemplare vonLaminaria hyperborea zeigten von Februar bis Mai nur dann ein beträchtliches Wachstum des neuen Phylloids, wenn das alte Phylloid an der Pflanze belassen wurde.

Summary

1. Two and three year old specimens ofLaminaria hyperborea were transplanted to sub-tidal growth stations at 2 and 6 m water depth, respectively.

2. Maximum growth rate occurred in early May in specimens growing at 2 m depth, and in early June at 2 m depth.

3. Frond area size, attained by the specimens growing at 6 m depth in July, was at least 75 % of frond area size attained at 2 m depth. Stipe length of plants at 6 m depth, as recorded in July, was only about 1/3 of the stipe length attained at 2 m depth.

4. Growth rates of new phylloids ofLaminaria hyperborea specimens kept in darkness from February until May are considerably reduced, if the old frond is amputated.

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Lüning, K. Cultivation ofLaminaria hyperborea in situ and in continuous darkness under laboratory conditions. Helgolander Wiss. Meeresunters 20, 79–88 (1970). https://doi.org/10.1007/BF01609889

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