About the Authors

Ljerka Lah

Affiliation Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany

Daronja Trense

Affiliation Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany

Harald Benke

Affiliation Deutsches Meeresmuseum, Stralsund, Germany

Per Berggren

Affiliation Dove Marine Laboratory, School of Marine Science and Technology, Newcastle University, Cullercoats, North Shields, United Kingdom

Þorvaldur Gunnlaugsson

Affiliation Marine Research Institute, Reykjavík, Iceland

Christina Lockyer

Affiliation North Atlantic Marine Mammal Commission, Tromsø, Norway

Ayaka Öztürk

Affiliation Marine Biology Department, Faculty of Fisheries, Istanbul University, Istanbul, Turkey

Bayram Öztürk

Affiliation Marine Biology Department, Faculty of Fisheries, Istanbul University, Istanbul, Turkey

Iwona Pawliczka

Affiliation Hel Marine Station, University of Gdansk, Hel, Poland

Anna Roos

Affiliation Swedish Museum of Natural History, Stockholm, Sweden

Ursula Siebert

Affiliation Institute for Terrestrial and Aquatic Wildlife Research (ITAW), University of Veterinary Medicine Hannover Foundation, Büsum, Germany

Krzysztof Skóra

† Deceased.

Affiliation Hel Marine Station, University of Gdansk, Hel, Poland

Gísli Víkingsson

Affiliation Marine Research Institute, Reykjavík, Iceland

Ralph Tiedemann

tiedeman@uni-potsdam.de

Affiliation Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: RT. Data curation: LL RT. Formal analysis: LL. Funding acquisition: US RT. Investigation: LL DT. Methodology: LL RT. Project administration: RT. Resources: HB PB ÞG CL AÖ BÖ IP AR US KS GV RT. Software: LL. Supervision: RT. Validation: LL RT. Visualization: LL RT. Writing – original draft: LL RT. Writing – review & editing: LL DT HB PB ÞG CL AÖ BÖ IP AR US KS GV RT.