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Heliconius in a New Light: The Effects of Light Environments on Mimetic Coloration, Behavior, and Visual Systems


Abstract Although mimetic animal coloration has been studied since Darwin's time, many questions on the efficacy, evolution, and function of mimicry remain unanswered. Müller (1879) hypothesized that unpalatable individuals converge on the same conspicuous coloration to reduce predation. However, there are many cases where closely related, unpalatable species have diverged from a shared conspicuous pattern. What selection pressures have led to divergence in warning colors? Environmental factors such as ambient light have been hypothesized to affect signal transmission and efficacy in animals. Using two mimetic pairs of Heliconius butterflies, Postman and Blue-white, I tested the hypothesis that animals with divergent mimetic colors segregate by ... (more)
Created Date 2016
Contributor Seymoure, Brett Michael (Author) / Rutowski, Ronald L (Advisor) / McGraw, Kevin J (Advisor) / McMillan, W. Owen (Committee member) / Pratt, Stephen (Committee member) / Gadau, Jurgen (Committee member) / Arizona State University (Publisher)
Subject Biology / Zoology / Ecology / Butterflies / Electroretinography / Irradiance / Plasticine Models / Visual Models / Visual Sensitivity
Type Doctoral Dissertation
Extent 144 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Biology 2016
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis