Global ETD Search
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Showing 1 to 6 of 6 for “"Sexual dichromatism"”.
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Coloration, Camouflage, and Sexual Dichromatism in the Northern Pacific Rattlesnake (Crotalus oreganus)
… The hypothesis that <em>C. oreganus </em>shows sexual dichromatism (inter-sexual differences in color and/or pattern) was also tested by comparing both overall snake color, and the strength of contrast in tail bands between the sexes. I found that <em>C. oreganus </em>varies in color …
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Population Genomic And Phenotypic Diversification In African Reed Frogs
… exhibit a number of unusual traits including sexual dichromatism, a form of sexual dimorphism where males and females are different colors, a diverse assortment of reproductive modes, and physiological adaptations for living in arid environments, which provides a rich framework for …
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Behavioral Measures and Ecological Correlates of Vision in Poeciliid Fishes
… high-predation environments. I also found that sexual dimorphism in eye diameter appears to be driven by sexual dimorphism in standard length, as there was no significant effect of sex on eye diameter after accounting for standard length.</p><p>Finally, in Chapter 4 I examine variation in eye …
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The evolutionary genetics of sexually selected plumage colour traits in the galliform birds
… plumage traits in birds are a classic example of sexual selection. However we know very little about the units that selection is acting upon, the genes themselves – what are they and how are they influenced by sexual selection? In this study I focused on in the evolution and genetics of …
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Conservation Taxonomy of the Cuban Parrot: Morphological, Plumage and Flight Call Variation
… <p>Most morphological characters indicated sexual dimorphism, with males 1-4% larger than females. The plumage characters, in contrast, demonstrated complete absence of sexual dichromatism. Stepwise discriminant analyses including all specimens and 14 characters revealed substantial …
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Speciation and the evolution of male breeding coloration in darters
The means by which sexual selection can promote speciation is a topic of much debate and study. Darters, a species-rich clade of freshwater fishes that exhibit widespread sexual dichromatism, may represent a prime example of speciation by sexual selection. I investigated mechanisms of sexual …