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Zooplankton vertical migration and plasticity of pigmentation arising from simultaneous UV and predation threats

  • Samuel Hylander
  • Niklas Larsson
  • Lars-Anders Hansson
Publishing year: 2009
Language: English
Pages: 483-491
Publication/Series: Limnology and Oceanography
Volume: 54
Issue: 2
Document type: Journal article
Publisher: ASLO
Additional info: The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Aquatic Ecology (432112234), Organic chemistry (S/LTH) (011001240)

Abstract english

We assessed how zooplankton (copepods) handle the simultaneous threats of predators and ultraviolet (UV)

radiation and whether they respond with changes in pigmentation, vertical migration, or both. We found weak

vertical migration among copepods in response to UV stress, and this response was not apparently influenced by

predation risk. Exposure to high levels of UV radiation caused copepods to retain pigments in the absence of a

predation threat. When exposed to predation threat, they reduced their pigmentation regardless of UV level.

Thus, they ranked predation as a threat more severe than UV radiation. Reducing the protective pigment level in

response to predation in a situation in which UV radiation is high may, however, lead to higher mortality.


  • Ecology


  • Centre for Animal Movement Research
  • ISSN: 1939-5590
Lars-Anders Hansson
E-mail: lars-anders [dot] hansson [at] biol [dot] lu [dot] se


Aquatic ecology

+46 46 222 41 69






Research group

Aquatic Ecology

Other projects I´m involved in

Doctoral students and postdocs

PhD students, main supervisor

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