About the Authors

Stephen D. Cairns


Affiliation Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SDC. Performed the experiments: SDC. Analyzed the data: SDC. Contributed reagents/materials/analysis tools: SDC. Wrote the paper: SDC.