Abstract
A HIGHLY interesting report by Dr. C. G. J. Petersen descrbes the methods and results of recent work on the evaluation of the bottom fauna and flora of the sea in the Kattegat, Limfjord, and eisewhere. Abandoning the use of the dredge, as affording misleading ideas of the abundance of life on the bottom, the author invented bis “bottomsanipiers,” which are apparatus that can lift up a sample of the sea-floor with its contained animals and piants. The area of bottom lifted varies between 0.1 and 1 square metre, the smailer apparatus being used at the greater depths. By a process of washing, the organisms are removed, counted, and weighed. The plates represent typical resuits, all the organisms found being drawn, in actual size, on paper ¼ square metre in area, which is then reduced to in. linear.
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J., J. Production in the Sea 1 . Nature 102, 216 (1918). https://doi.org/10.1038/102216a0
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DOI: https://doi.org/10.1038/102216a0