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Artificial light during the polar night disrupts Arctic fish and zooplankton behaviour down to 200 m depth

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  • Jørgen Berge
  • Maxime Geoffroy
  • Malin Daase
  • Finlo Cottier
  • Pierre Priou
  • Jonathan H. Cohen
  • Geir Johnsen
  • David McKee
  • Dr Ina Kostakis
  • Paul E. Renaud
  • Daniel Vogedes
  • Philip Anderson
  • Kim S. Last
  • Stephane Gauthier
For organisms that remain active in one of the last undisturbed and pristine dark environments on the planet—the Arctic Polar Night—the moon, stars and aurora borealis may provide important cues to guide distribution and behaviours, including predator-prey interactions. With a changing climate and increased human activities in the Arctic, such natural light sources will in many places be masked by the much stronger illumination from artificial light. Here we show that normal working-light from a ship may disrupt fish and zooplankton behaviour down to at least 200 m depth across an area of >0.125 km2 around the ship. Both the quantitative and qualitative nature of the disturbance differed between the examined regions. We conclude that biological surveys in the dark from illuminated ships may introduce biases on biological sampling, bioacoustic surveys, and possibly stock assessments of commercial and non-commercial species.
Original languageEnglish
Article number102
Number of pages8
JournalCommunications Biology
Publication statusPublished - 5 Mar 2020


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