Effects of phenotypic variation onto body temperature and flight activity in a polymorphic insect |
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Authors: | JESSICA BOTS LUC DE BRUYN RAOUL VAN DAMME HANS VAN GOSSUM |
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Affiliation: | Evolutionary Ecology Group, Department of Biology, University of Antwerp, Antwerp, Belgium;and Laboratory for Functional Morphology, Department of Biology, University of Antwerp, Antwerp, Belgium |
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Abstract: | Abstract. According to biophysical principles, colour and size are important phenotypic factors that may influence body temperature and activity in ectothermic insects. In taxa showing female-limited polymorphism, males and female morphs differ in body colour, size and activity pattern. However, no previous study has evaluated whether such phenotypic and behavioural variation relates to differences between males and female morphs in thermal properties. In the present study, the relationships between body colour, size, activity and body temperature are examined under laboratory and field conditions, for the polymorphic damselfly Enallagma cyathigerum (Charpentier, 1840) (Odonata: Zygoptera). Contrary to expectation, males and female colour morphs of this species do not differ in thermal properties (i.e. heating characteristics or field body temperatures). When questioning phenotype and activity, temperature does not appear to be relevant for understanding the maintenance of female-limited polymorphism. |
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Keywords: | Ambient and body temperature colour damselflies female-limited polymorphism size thermal properties thermoregulation |
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