1. Ecology
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Kairomones: Finding the fish factor

  1. Georg Pohnert  Is a corresponding author
  1. Friedrich Schiller University Jena, Germany
  2. Max Planck Institute for Chemical Ecology, Germany
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Cite this article as: eLife 2019;8:e48459 doi: 10.7554/eLife.48459
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Daphnia water fleas change their behavior if fish are present.

Left: During the day Daphnia migrate to deeper, darker regions of the lake if they detect chemical signals called kairomones (not shown) that are released by fish. Middle: At night, when fish cannot see them, Daphnia move up to the water near the surface to eat the microalgae (green circles) that are plentiful there. Right: When no fish are present, there are no kairomones to detect, and Daphnia stay near the surface day and night.

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