About the Authors
Department of Zoology, University of Guelph, Guelph, Ontario, Canada
Program for the Human Environment, Rockefeller University, New York, New York, United States of America
National Wildlife Research Centre, Canadian Wildlife Service, Ottawa, Ontario, Canada
The authors have declared that no conflicts of interest exist.
PDNH conceived and designed the experiments. TSZ performed the experiments. PDNH, MYS, and TSZ analyzed the data. CMF contributed reagents/materials/analysis tools. PDNH, MYS, and CMF wrote the paper.