About the Authors

Sylvain Giroud

Contributed equally to this work with: Sylvain Giroud, Carla Frare

sylvain.giroud@vetmeduni.ac.at

Affiliation Research Institute of Wildlife Ecology, Department of Integrative Biology and Evolution, University of Veterinary Medicine, Vienna, Austria

Carla Frare

Contributed equally to this work with: Sylvain Giroud, Carla Frare

Address Current address: Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, Alaska, United States of America

Affiliation Research Institute of Wildlife Ecology, Department of Integrative Biology and Evolution, University of Veterinary Medicine, Vienna, Austria

Arjen Strijkstra

Affiliations University Medical Center Groningen, Departments of Chronobiology & Molecular Neurobiology, University of Groningen, Groningen, The Netherlands, Department of Chronobiology, University of Groningen, Groningen, The Netherlands, Wildlife Management, University of Applied Sciences Van Hall Larenstein, Leeuwarden, The Netherlands

Ate Boerema

Affiliations Department of Chronobiology, University of Groningen, Groningen, The Netherlands, University Medical Center Groningen, Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen, The Netherlands

Walter Arnold

Affiliation Research Institute of Wildlife Ecology, Department of Integrative Biology and Evolution, University of Veterinary Medicine, Vienna, Austria

Thomas Ruf

Affiliation Research Institute of Wildlife Ecology, Department of Integrative Biology and Evolution, University of Veterinary Medicine, Vienna, Austria

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Provided the tissues: AS AB. Conceived and designed the experiments: WA TR. Performed the experiments: SG CF. Analyzed the data: SG CF TR. Wrote the paper: SG.