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The size of diatoms: III. the cell width of Biddulphia sinensis Greville from the southern North Sea

Published online by Cambridge University Press:  11 May 2009

R. S. Wimpenny
R. S. Wimpenny
Affiliation:
Ministry of Agriculture, Fisheries and Food, Lowestoft
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Extract

The present contribution deals with the measurements of fifty-two samples of Biddulphia sinensis collected by Hensen net hauls from the Ministry of Agriculture and Fisheries research ships George Bligh and Onaway, working in the southern North Sea between 1932 and 1938. With one exception in which there were only seventy available, the samples consisted of a hundred cells and the unit of measurement was that employed in Part I of this paper (Wimpenny, 1936). The dimension used was the greatest width (apical axis), and care was taken to see that the cells measured were lying flat, to give the true maximum of their elliptical cross-section. For convenience in tabulation and to avoid random fluctuations due to too small grouping of the data, the measurement units have been taken in pairs in the presentation of all the sea results, each arbitrary unit being equivalent to about 8 μ. The measurements from cultures, where the samples were sometimes fewer than a hundred, have been 4μ units.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 35 , Issue 2 , June 1956 , pp. 375 - 386
Copyright
Copyright © Marine Biological Association of the United Kingdom 1956

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References

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