Acta Biotheoretica

, Volume 19, Issue 2, pp 87–93 | Cite as

Periodic oviposition in the freshwater snail Lymnaea stagnalis: A new type of endogenous rhythm

  • W. J. Van Der Steen
Article
Received:

Conclusion

The overt oviposition rhythm ofLymnaea stagnalis should be regarded as an endogenous one. Despite considerable deviations of its period from 24 hrs, entrainment by 24 hr. external periodicities is possible. Possibly, entrainment is effectuated via a second — covert — internal rhythm. The fact that similar rhythms have not been established before, is probably connected with the nature of the phenomena to which previous studies have generally been limited.

Keywords

Freshwater Snail Periodic Oviposition Endogenous Rhythm Similar Rhythm Internal Rhythm 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© E. J. Brill 1970

Authors and Affiliations

  • W. J. Van Der Steen
    • 1
  1. 1.Zoological DepartmentFree UniversityAmsterdamThe Netherlands

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