About the Authors
Department of Biology, University of Nevada, Reno, Reno, Nevada, United States of America
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: AL JB. Performed the experiments: AL JB. Analyzed the data: AL. Wrote the paper: AL AD DP.