Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Ecological selection"”.
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Linking ecological divergence and reproductive isolation: a tale of two killifish
… divergence with gene flow, either very strong selection or some other mechanism that reduces recombination rates is needed to maintain different allelic combinations. Decreased recombination is especially important in cases of ecological speciation with gene flow. A decade of work in …
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The mechanisms underlying convergent evolution in the plumage patterns of birds
… genetics, evolutionary development, natural selection for signaling and camouflage. Japanese quail (Coturnix japonica) is a model system in developmental biology. Examining the developmental basis of pattern formation using molecular techniques, the dorsal patterning of embryonic quail is …
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Diet, adaptation and the evolution of assortative mating in Ceratitis capitata
Abstract The action of natural selection in establishing barriers to gene flow between populations, or reproductive isolation, is increasingly understood to be a primary driver of speciation and thus biodiversity. ‘Ecological speciation’ is now supported by evidence from numerous studies in a range …
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Cultural evolution in Rufous-and-white Wrens (Thryophilus rufalbus): Insights from acoustic and genetic analyses
… on acoustic variation. In addition I incorporate ecological data and use a sound transmission experiment to explore the effect that ecological variation has on acoustic evolution. My results indicate that males and females exhibit similar patterns of acoustic variation, suggesting that similar …
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Patterns and process during the diversification of the cichlid fishes in Lake Malawi, Africa
… of a recent model of speciation via intrasexual selection were tested by comparing aggressive behavior during territorial contests among five closely related cichlid species from Lake Malawi. I found that interactions between conspicuously heteromorphic males tend to be less aggressive than …
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Reassessment of species limits and diversification process in the Cape grass genus Ehrharta Thunb
… most biodiverse floras in the world. Although ecological speciation is thought to be a primary mechanism behind diversification in the GCFR, it has recently been hypothesised that non-ecological speciation may have an influential role in driving diversification in the montane “sky islands” of …
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Behavioural, microhabitat, and phylogenetic dimensions of intrasexual contest competition in combatant monkey beetles (Scarabaeidae: Hopliini)
The importance of sexual selection as a driver of evolution, from microevolution to speciation, has overwhelmingly been studied in the context of female choice, but there is evidence that male-male competition can also drive evolution. Recent reviews of the intrasexual competition literature have …
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Exploring the factors at play to make wastewater biorefineries a reality
… to the wastewater biorefinery, leading to selection of appropriate reactor designs. Stoichiometric mass balances of all unit operations are established, showing the material value flows, and combined to model this multi-bioreactor approach. Subsequently the model is tested against …