Differences in adult and reproductive lifespan in the two male forms ofMnais pruinosa costalis selys (Odonata: Calopterygidae) |
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Authors: | Yoshitaka Tsubaki Rowan E Hooper Michael T Siva-Jothy |
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Institution: | (1) Laboratory of Wildlife Conservation, National Institute for Environmental Studies, 305 Tsukuba, Japan;(2) Department of Animal and Plant Sciences, University of Sheffield, S10 2TN Sheffield, UK |
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Abstract: | The damselflyMnais pruinosa costalis (Odonata: Calopterygidae) is unusual in that males are dimorphic, existing as clear-winged non-territorial ‘sneaks’ and orange-winged
territorial ‘fighters’. Here we report the results of population census data and behavioural observations in the field and
laboratory, and present estimates of emergence period, reproductive period, total lifespan, and reproductive success of each
morph. Clear-winged males are smaller and have lower daily reproductive success than orange-winged males, but live for longer
in the field and laboratory. We accounted for the difference in the ‘operational reproductive life’ of the two morphs and
estimated lifetime reproductive success: there was no difference between clear-winged and orange-winged males. We discuss
possible mechanisms for the maintenance of the two forms. |
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Keywords: | alternative reproductive tactics dimorphism Odonata reproductive success Mnaispruinosa costalis |
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