TY  - STD
AU  - Viblanc V. A., A. Stier
PY  - 2013//
TI  - Are both sexes 'sexy'? Individual quality in monomorphic king penguins. VIIIth International Penguin Conference, 2-6 September, Bristol, United Kingdom.
N2  - King penguins (Aptenodytes patagonicus) are amongst the most colourful of penguin species. They display bright yellow to orange auricular feather patches, a yellow to rusty-brown breast feather patch, and yellow to orange bill spots, which are known to also reflect UV. Why both sexes have evolved to mutually share such extravagant plumage features, however, is a puzzling question that mostly remains an important unexplained pattern of evolutionary biology. Growing consensus is that in such species; where both parents are dependent on each other and required to cooperate to successfully raise their offspring, selection should favour mutual mate choice for high quality partners. However, because males and females often have differing physiological constraints, it is unclear what proximate physiological pathways guarantee the honesty of male and female ornaments and whether similar ornaments convey similar (or different) information on quality in both sexes. Here, we investigated the relationships between colour ornaments and various physiological and behaviour proxies of individual quality. Specifically, we searched for links between penguin’s body condition, parasite loads, oxidative status, stress status, metabolic rate, behaviour and ornamental features. Our results suggest complex multi-modal and sex-specific signalling of certain, but not all, of those different features. Such signalling may be used to assess sex-specific qualities determinant to mate choice.
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ID  - ViblancV.A.2013
ER  -