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The Role of Surface Viscosity in the Escape Mechanism of the Stenus Beetle

Dietz, Alexander A. ; Hofmann, Matthias J. ; Motschmann, Hubert



Abstract

Beetles of the species Stenus comma live and hunt close to ponds and rivers, where they occasionally fall on the water surface. To escape this jeopardized state, the beetle developed a strategy relying on the excretion of a secretion containing the substances stenusine and norstenusine. They reduce surface tension and propel the bug to the saving river bank. These substances were synthesized and ...

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