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Diurnal Rhythm in ‘Organic Drift’ of Gammarus pulex

Abstract

Dendy1, Wolff2, Müller3 and Waters4 have described the phenomenon of organic drift in flowing waters. During an investigation of Baetis rhodani and B. vernus (Ephemeroptera) I showed that the drift of organisms in a flowing body of water is not a result of their being passively carried along but rather constitutes a periodic behaviour pattern (change in activity) on the part of the animals, which is connected with change between day and night5.

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References

  1. Dendy, J. S., Ecol. Mon., 14, 333 (1944).

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  2. Wolff, Ph., Skrifter fran Svenska Lax-och Laxöringsförening, 1 (Gleerup, Lund, Sweden, 1947).

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  3. Müller, K., Rep. Inst. Freshwater Res. Drottningholm, 35, 133 (1953).

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  4. Waters, T. F., Ecology, 42, 532 (1961).

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  5. Müller, K., Naturwiss., 5, 161 (1963).

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  6. Müller, K., Naturwiss. (in the press).

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MÜLLER, K. Diurnal Rhythm in ‘Organic Drift’ of Gammarus pulex. Nature 198, 806–807 (1963). https://doi.org/10.1038/198806a0

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