About the Authors

Cecilia A. M. Sandström

c.a.m.sandstrom@rug.nl

Affiliations University of Groningen, Arctic Centre, PO Box 716, 9700 AS Groningen, the Netherlands, University of Groningen, Ocean Ecosystems, Nijenborgh 7, 9747 AG Groningen, the Netherlands

Jouke Prop

Affiliation University of Groningen, Arctic Centre, PO Box 716, 9700 AS Groningen, the Netherlands

Henk van der Jeugd

Affiliation Vogeltrekstation - Dutch Centre for Avian Migration and Demography (NIOO-KNAW), PO Box 50, 6700 AB Wageningen, the Netherlands

Maarten J. J. E. Loonen

Affiliation University of Groningen, Arctic Centre, PO Box 716, 9700 AS Groningen, the Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CAMS JP MJJEL HvdJ. Performed the experiments: CAMS JP MJJEL HvdJ. Analyzed the data: CAMS JP. Contributed reagents/materials/analysis tools: CAMS JP MJJEL. Wrote the paper: CAMS JP MJJEL HvdJ.