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A new rapid method for the production of permanent stained slides of marine plankton

Since the development of the membrane or molecular (cellulose) filter in 1951 a number of techniques describing filtration and preservation of plankton have been submitted (McNabb, 1960; Moore, 1963). Although these procedures have yielded good results, they are lengthy, requiring at least 24 h before the sample can be analysed. The present paper offers a method for filtration and rapid, simplified preservation and permanent mounting of marine plankton on a membrane filter. An aliquot must be drawn from a well-agitated plankton sample with the size of the aliquot dependent upon the abundance of plankton in the sample. After working with numerous aliquots, one can judge by the appearance of the sample how large an aliquot should be used in order to finally produce slides on which