About the Authors

Einar Árnason

einararn@hi.is

Affiliation Institute of Biology, University of Iceland, Reykjavík, Iceland

Ubaldo Benitez Hernandez

Affiliation Institute of Biology, University of Iceland, Reykjavík, Iceland

Kristján Kristinsson

Affiliation Marine Research Institute, Reykjavík, Iceland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EA. Performed the experiments: UBH. Analyzed the data: EA UBH. Contributed reagents/materials/analysis tools: EA KK. Wrote the paper: EA. Participated in the refinement and exposition of ideas: EA UBH KK. Helped design and coordinate the sampling, compiled both individual data and catch data from logbooks: KK.