About the Authors

Mia T. Levine

To whom correspondence should be addressed. E-mail: mialevine@ucdavis.edu

Affiliation Center for Population Biology, University of California at Davis, Davis, California, United States of America

David J. Begun

Affiliation Center for Population Biology, University of California at Davis, Davis, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DB ML. Performed the experiments: ML. Analyzed the data: ML. Wrote the paper: DB ML.