About the Authors

Henn Ojaveer

Contributed equally to this work with: Henn Ojaveer, Margit Eero

henn.ojaveer@ut.ee

Affiliation Estonian Marine Institute, University of Tartu, Pärnu, Estonia

Margit Eero

Contributed equally to this work with: Henn Ojaveer, Margit Eero

Affiliation National Institute of Aquatic Resources, Technical University of Denmark, Charlottenlund, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: ME HO. Contributed reagents/materials/analysis tools: HO ME. Wrote the paper: HO ME.