About the Authors

Ann I. Larsson

Contributed equally to this work with: Ann I. Larsson, Johanna Järnegren

Affiliation Department of Biological and Environmental Sciences, University of Gothenburg, Tjärnö, Sweden

Johanna Järnegren

Contributed equally to this work with: Ann I. Larsson, Johanna Järnegren

Johanna.Jarnegren@nina.no

Affiliation Norwegian Institute for Nature Research, Trondheim, Norway

Susanna M. Strömberg

Affiliation Department of Biological and Environmental Sciences, University of Gothenburg, Tjärnö, Sweden

Mikael P. Dahl

Current address: Department of Medical Biology, University of Tromsoe, Tromsø, Norway

Affiliation Department of Biological and Environmental Sciences, University of Gothenburg, Tjärnö, Sweden

Tomas Lundälv

Affiliation Sven Lovén Centre for Marine Sciences, University of Gothenburg, Tjärnö, Sweden

Sandra Brooke

Affiliation Florida State University Coastal and Marine Laboratory, St Teresa, Florida, United States of America

Competing Interests

This work received funding from Statoil to parts of the results. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JJ SB AIL SMS MPD. Performed the experiments: JJ SB AIL SMS MPD. Analyzed the data: JJ SB AIL SMS MPD. Contributed reagents/materials/analysis tools: JJ SB AIL SMS MPD TL. Wrote the paper: JJ SB AIL SMS MPD TL.