About the Authors
- Jeff A. Tracey
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* E-mail: jatracey@usgs.gov
Affiliation U.S. Geological Survey, Western Ecological Research Center, San Diego Field Station, San Diego, California, United States of America
- James Sheppard
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Affiliation San Diego Zoo Institute for Conservation Research, Escondido, California, United States of America
- Jun Zhu
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Affiliation Department of Statistics and Department of Entomology, University of Wisconsin – Madison, Madison, Wisconsin, United States of America
- Fuwen Wei
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Affiliation Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Science, Beijing, People's Republic of China
- Ronald R. Swaisgood
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Affiliation San Diego Zoo Institute for Conservation Research, Escondido, California, United States of America
- Robert N. Fisher
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Affiliation U.S. Geological Survey, Western Ecological Research Center, San Diego Field Station, San Diego, California, United States of America
Competing Interests
Sempra Energy funded this study. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all of the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: JAT JS JZ. Performed the experiments: JAT JS JZ FW. Analyzed the data: JAT JS. Contributed reagents/materials/analysis tools: JAT JS. Wrote the paper: JAT JS JZ FW RRS RNF. Field data: JS FW.