About the Authors

Eve Jourdain

Contributed equally to this work with: Eve Jourdain, Dag Vongraven

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Visualization, Writing – original draft, Writing – review & editing

eve@norwegianorcasurvey.no

Affiliation Norwegian Orca Survey, Andenes, Norway

Dag Vongraven

Contributed equally to this work with: Eve Jourdain, Dag Vongraven

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Visualization, Writing – original draft, Writing – review & editing

Affiliation Norwegian Polar Institute, Tromsø, Norway

Anna Bisther

Roles Funding acquisition, Investigation, Methodology, Writing – review & editing

‡ These authors also contributed equally to this work.

Affiliation Reportagebörsen, Gothenburg, Sweden

Richard Karoliussen

Roles Funding acquisition, Investigation, Methodology, Resources, Writing – review & editing

‡ These authors also contributed equally to this work.

Affiliation Norwegian Orca Survey, Andenes, Norway

Competing Interests

Part of the funding was from a commercial source, being Sea World and Busch Gardens Conservation fund and Sea World and Parks Entertainment. AB is also employed (at the time of writing) by commercial company Reportagebörsen. This does not alter our adherence to PLOS ONE policies on sharing data and materials.