Hawkmoths’ innate flower preferences: a potential selective force on floral biomechanics |
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Authors: | Jordanna D H Sprayberry Marie Suver |
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Institution: | (1) Department of Biology, University of Washington, Seattle, WA 98195, USA;(2) Arizona Research Laboratory Division of Neuroscience, University of Arizona, 1040 E 4th St., Tucson, AZ 85721, USA;(3) Computation and Neural Systems, California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125, USA;(4) Biology Department, Muhlenberg College, 2400 W Chew St, Allentown, PA 18104, USA |
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Abstract: | While plant–pollinator interactions are a classic model system for evolutionary relationships, the relationship between forager
energetics and floral motions remains little explored. In this study, we show that hawkmoths preferentially feed on horizontally
oscillating flowers, which have previously been shown to yield higher energy gains during feeding bouts than looming flowers.
We also analyze natural flower motions exhibited by four hawkmoth-pollinated species. Our analysis shows these flowers have
higher amplitude motions in the horizontal axis than that in the looming axis. This work demonstrates the potential for adaptation
between the biomechanical determinates of flower motions and the feeding performance of hawkmoths. |
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