Abstract
Butterflies are regularly used as model systems for understanding the role of coloration in communication because of their highly variable and conspicuous phenotypes. Most research showing a role for color in communication has focused on aspects of brightness or hue of entire wings or large color patches. However, evidence is accumulating that butterflies sometimes use smaller wing pattern elements in communication. Here we provide evidence that both male and female cabbage white butterflies (Pieris rapae L.) discriminate among conspecifics on the basis of the number of small but conspicuous black wing spots of the dorsal forewing. Male butterflies were more interactive with model butterflies with two spots, which resemble female butterflies, than with model butterflies with only one spot, which resemble male butterflies. Female butterflies showed the opposite response, being more interactive with male-like (one-spot) models than with female-like (two-spot) models. Some of our experiments were conducted with an electronic device designed to create a realistic and controlled fluttering behavior of the models. We describe the design and function of this device and provide evidence that it increased butterfly responses compared to a non-fluttering model. This device could prove useful for others addressing questions of communication in butterflies or other flying insects.
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Funding for this research was provided by the Butler University College of Liberal Arts and Sciences and the Department of Biological Sciences as well as by the Denison University Department of Biology. Katherine Ireland provided assistance in the field.
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Stoehr, A.M., Hayes, K. & Wojan, E.M. Assessing the Role of Wing Spots in Intraspecific Communication in the Cabbage White Butterfly (Pieris rapae L.) Using a Simple Device to Increase Butterfly Responses. J Insect Behav 29, 243–255 (2016). https://doi.org/10.1007/s10905-016-9556-2
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DOI: https://doi.org/10.1007/s10905-016-9556-2