Wing pigmentation, immune ability, fat reserves and territorial status in males of the rubyspot damselfly, Hetaerina americana

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Sexual size dimorphism in the American rubyspot: male body size predicts male competition and mating success (2007, background): “Forsyth & Montgomerie 1987; Plaistow & Tsubaki 2000), causing different selection pressures on body sizes of males and females ( Conrad & Pritchard 1992; Thompson & Fincke 2002); their SSD ranges from female to male biased (Anholt et al. 1991).”
The size of the red wing spot of the American rubyspot as a heightened condition-dependent ornament (2008, methodology): “We predict that because middle-aged males show the greatest fat (Contreras-Garduño et al. 2006) and muscle (Serrano-Meneses et al. 2007) value variation, these males should spend more time fighting over territories and will be more likely to act as territorials.”