1. Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2
2. Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
3. Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
4. Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9
5. Department of Psychology, University of Michigan, Ann Arbor, MI 48109-1043, USA
6. Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109-1043, USA
7. Natural Resource Sciences, MacDonald Campus, McGill University, Ste-Anne-de-Bellevue, Québec, Canada H9X 3V9