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 20 of 123 for “"Butterflies"”.
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Genomics of Butterflies
… to sequence and comparatively analyze genomes of butterflies and address general questions of molecular evolution and connection between genotype and phenotype. First, we study mimetic convergence and divergence on a phylogenetic group of butterflies revealing many instances of rapid phenotypic …
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Butterflies Thrive On Octane
<p>The purpose of my thesis is to challenge the boundaries between non-fiction and fiction. My entire thesis is non-fiction, but I plan to use a lot of the literary techniques learned throughout my workshops and classes to challenge the aesthetic of non-fiction. I also want to challenge my reader …
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Adaptation to altitude in Heliconius butterflies
… experienced in the wild by Heliconius butterflies, I measured hourly temperature and humidity for a full year in 28 sites across elevations and microhabitats on both sides of the Andes. The canopy greatly buffered the climate within the forest, but publicly available datasets failed to …
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THE EVOLUTION OF PHENOTYPIC PLASTICITY IN BUTTERFLIES
… to rearing temperature is an ancestral trait in butterflies. By mapping onto a phylogeny of Nymphalid butterflies, how 20E titers respond to rearing temperature across species, as well as the presence of 20E receptor in eyespots, and the sensitivity of eyespots to 20E signaling, I inferred that …
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Butterflies fly away: insect decline in California, USA
… and pesticide use in causing the decline of butterflies over the past 50 years. Chapter 1 reviews the current literature on the impacts of climate change from long-term monitoring datasets of insects across the world. We find that climate change has been shown to be an important factor in …
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Thermal adaptation in butterflies: patterns, significance and mechanisms
… to regional climates. Furthermore, by rearing butterflies in both studies at different temperatures, environmentally-induced plasticity is demonstrated to be as important as genetic factors in mediating adaptive responses. Consequently both sources of variation need to be considered when trying …
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Population Structure of Limenitis Butterflies in Hickman, Kentucky
Two species of Limenitis butterflies occur along the Mississippi River at Hickman, Kentucky: the viceroy, L. archippus, and the red-spotted purple, L. arthemis astyanax. Limenitis archippus occurs at a frequency that is 10-30 times more abundant than its congener, L. arthemis astyanax. …
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Genetic architecture and ecological speciation in Heliconius butterflies
… and facilitate speciation. Mimicry in tropical butterflies has long been championed as an example of adaptation driving speciation. In the Neotropical genus Heliconius, distantly related pairs of unpalatable species often converge on the same bright warning-pattern to more efficiently advertise …
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Evolutionary and proximate constraints on egg size in butterflies
… network is still only partially resolved. Using butterflies as model organisms, this study focuses on two main factors that are assumed to strongly shape variation in offspring size and number: maternal size and maternal nutrition. Both are assumed to affect reproductive traits and thereby …
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An annotated list of the butterflies of Delhi, India
Thesis (M.S.)--Michigan State University. Dept. of Entomology, 1965
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Selection of Overwintering Microclimate by Migratory Western Monarch Butterflies
… spatial and temporal scales. Western monarch butterflies migrate seasonally to overwinter in groves at geographically predictable locations along the California coast. To date, overwintering habitat selection by western monarch butterflies has been studied assuming that habitat selection …
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Pheromones in Heliconius butterflies: Chemical ecology, genetics, and behaviour
… compounds to attract males over long distances. Butterflies fly during the day and were thought to rely more on vision. However, male pheromones in butterflies have also been described but have rarely been studied to the same detail as the female pheromones of night-flying moths. The Neotropical …
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Developmental Basis of Wing Pattern Diversity in Heliconius Butterflies
… across the wings of three different heliconiine butterflies. I identified candidate factors for regulating the expression of wing patterning genes, including genes with a conserved expression profile in all three species, and others, including genes in the Wnt pathway, with markedly different …
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The genomic basis of species barriers in Heliconius butterflies
Understanding the genetics underlying the speciation process has been a long-standing goal of evolutionary biology. Studying inter-population crosses can elucidate the genetic architecture of reproductive isolation and, ultimately, the process of speciation. Hybridization between two species is …
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Cyborg Butterflies, Liminal Medicine: Thyroid Hormone Treatment, 1890-1970
In this thesis, I develop a history of thyroid hormone treatment (THT) that centers on the bodies of animals and women between 1890 and 1970. This history contextualizes the current debate between two forms of THT, desiccated and synthetic. Drawing on the discourses present in biomedical journals, …
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Using Museomics to Investigate Extinction and Decline in British Butterflies
Globally, plant and animal species are declining due to land use changes, habitat destruction, and climate change. Conservation of endangered species is essential for their persistence, and to effectively conserve species we have to understand their genetic diversity. Conservation of insect species …
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ECOLOGY AND CONSERVATION OF BUTTERFLIES IN A TRANSFORMED TROPICAL LANDSCAPE
… future of Southeast Asia’s many forest dependent butterflies depends on how we manage populations in the region’s transformed tropical landscapes. Using Singapore as a model system, we show a slowdown in butterfly extinctions in the past 25 years. Our long-term dataset of 281 species showed that …
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Impacts of selective logging on tropical butterflies in Sabah, Malaysia
… the impacts of selective logging on tropical butterflies in the lowland dipterocarp rainforest of Sabah (Malaysia, Borneo). Walk and point-count transect methods were used to survey butterflies in unlogged forest and forest that had been selectively logged 10-11 years previously. The study …
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