CAnMove

During my PhD in limnology I mainly worked together with Lars-Anders Hansson (supervisor). Co-supervisor is Karin Rengefors.
 I worked with zooplankton responses to threats from ultraviolet radiation (UV) and predation. When exposed to fish cues zooplankton generally migrate to deep waters to avoid predation. Migration has, however, also been observed in lakes without fish predators indicating that there may be other benefits of the migration.
 My research has shown that several species of zooplankton react to UV radiation with downward migration. Vertical migration in response to UV is present among all size classes of zooplankton but since only large zooplankton (0.9 mm) are exposed to fish predation only these specimens seem to migrate in response to the predator cues. Zooplankton also accumulate pigments to reduce the UV damage. When they have a lot of pigments they however migrate less.