About the Authors
Department of Zoology, University of Oxford, Oxford, United Kingdom
Oxford Centre for Integrative Systems Biology, University of Oxford, Oxford, United Kingdom
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: JS KRF. Performed the experiments: JS. Analyzed the data: JS KRF. Wrote the paper: JS KRF.