Speed of Back-Swimming of Lymnaea

Abstract

The pond snail, Lymnaea stagnalis, can locomote on its back utilizing the surface tension of the water. We have called this form of movement ‘back-swimming’. In order to perform this behavior, the snail must flip itself over on its back so that its foot is visible from above. Little is known about the mechanism of this back-swimming. As a first step for the elucidation of this mechanism, we measured the speed of back-swimming of Lymnaea at the different times of the day. They back-swam significantly faster in the morning than just before dark. These data are consistent with our earlier findings on circadian-timed activity pattern in Lymnaea. Lymnaea appear to secrete a thin membrane-like substance from their foot that may allow them to back-swim. To confirm the existence of this substance and to examine whether this substance is hydrophobic or hydrophilic, we applied a detergent onto the foot during back-swimming. A single drop of 1% Tween 20 drifted Lymnaea away that were still kept at the water surface. These results suggest that Lymnaea secrete a hydrophobic substance from their foot that floats to the water surface allowing Lymnaea to back-swim.

References

  1. 1.

    Chono, K., Fujito, Y., Ito, E. (2002) Non-ocular dermal photoreception in the pond snail Lymnaea stagnalis. Brain. Res. 951, 107–112.

    CAS  Article  Google Scholar 

  2. 2.

    Wagatsuma, A., Sugai, R., Chono, K., Azami, S., Hatakeyama, D., Sadamoto, H., Ito, E. (2004) The early snail acquires the learning, comparison of scores for conditioned taste aversion between morning and afternoon. Acta. Biol. Hung. 55, 149–155.

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to E. Ito.

Rights and permissions

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Reprints and Permissions

About this article

Cite this article

Aono, K., Fusada, A., Fusada, Y. et al. Speed of Back-Swimming of Lymnaea. BIOLOGIA FUTURA 59, 105–109 (2008). https://doi.org/10.1556/ABiol.59.2008.Suppl.17

Download citation

Keywords

  • Back-swimming
  • detergent
  • interface
  • Lymnaea