Cycle and Rhythm in the Ovulation of the Spider Latrodectus geometricus C. Koch

Abstract

WE define ‘cycle’ as that phenomenon represented by regular variations of internal origin. By ‘rhythm’, we understand a phenomenon represented by regular variations imposed by external conditions. ‘Regularity’ signifies a constancy of the interval separating two identical stages of the variation1. The ovulation of the cosmotropical spider Latrodectus geometricus C. Koch is at one time both cyclic and rhythmic.

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References

  1. 1

    Reinberg, A., and Ghata, J., Rythmes et Cycles biologiques (Paris, 1957).

  2. 2

    Bouillon, A., Studia, Univ. Lovanium, Fac. Sci., 1, 10 (Leopoldville, 1957).

  3. 3

    Bouillon, A., and Lekie, R., Studia Univ. Lovanium, Fac. Sci., 12, 5 (Leopoldville, 1960).

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BOUILLON, A., LEKIE, R. Cycle and Rhythm in the Ovulation of the Spider Latrodectus geometricus C. Koch. Nature 191, 620–621 (1961). https://doi.org/10.1038/191620a0

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