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Patricia Adair Gowatyl: gowaty@eeb.ucla.edu o
Or Wyatt W. Anderson : wyatt@uga.edu
P.A.G., Y.-K.K., and W.W.A. designed research; P.A.G. analyzed data; Y.-K.K. supervised technicians who carried out the experiment, and entered observations into computerized records; and P.A.G. wrote the paper.
We thank Malin Ah-King; Margaret Anderson; Dan Blumstein; John Byers; Sergio Castrezana; Don Dewsbury; Lee C. Drickamer; Brant Faircloth; Mark Friedman; Greg Grether; Thierry Hoquet; Therese Markow; Steve Hubbell; Allen Moore; Sahotra Sarkar; Zuleyma Tang-Martinez; and Judy Stamps for comments and useful discussions; and Kyungsun “Sun” Kim for her work in carrying out the experiments.
The authors declare no conflict of interest.
National Science Foundation Grants IBN-9631801, IBN-0911606, and IOS-1121797 each provided partial support for the study.
Freely available online through the PNAS open access option.