Search for dissertations about: "carotenoid coloration"
Found 3 swedish dissertations containing the words carotenoid coloration.
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1. Development and maintenance of quality indicators in pheasants
Abstract : Females often base their choice of mates on the expression, size or intensity, of male sexual ornaments. Indicator models of sexual selection assume that females assess male genetic quality through the expression of these secondary sexual characters. READ MORE
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2. Female coloration, egg carotenoids and reproductive success: gobies as a model system
Abstract : In two-spotted gobies (Gobiusculus flavescens), females develop an orange belly as they approach sexual maturity. Toward the end of the single breeding season, males become rare and females compete for spawnings. Nest-holding males then prefer females with more colourful bellies and this trait has been suggested to act as a female ornament. READ MORE
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3. Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)
Abstract : Although sexual selection for elaborate signals is well documented in numerous species, the extreme diversity in signal design and expression in many taxa is largely unexplained. This thesis explores phylogenetic, mechanistic and ontogenetic explanations for divergence in two classic condition-dependent signal traits in the African widowbirds and bishops (Euplectes spp. READ MORE