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 199 for “"Butterfly"”.
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Imperial Butterfly
… to call “sonic nourishment.”</p> <p><em>Imperial Butterfly</em> follows one character, a woman (whom I call the “narrator”), through this process of transformation; a musical and emotional odyssey. This odyssey is my main character’s journey toward wholeness, which develops in the course of nine …
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Butterfly / urbanism
The charismatic Monarch butterfly (Danaus plexippus) is the most iconic migratory butterfly in North America. It is also a susceptible keystone species because of the monotonous host plant on which its larvae depend—namely, milkweed. In fact, the loss of breeding habitat in the US, due to the use …
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Making Scents of Butterfly Pheromone Evolution
… driving insect chemistry evolution. Neotropical butterfly chemical profiles are highly variable between species, sexes, and even tissues of the same individual. These butterflies are chemically defended and advertise toxicity with brightly coloured, mimetic warning signals. In addition, sex …
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Conservation biology of the marsh fritillary butterfly Euphydryas aurinia
… The distribution and persistence of the butterfly was quantified at a regional scale in one, intensively studied area (25km by 25km) in Dorset (England, UK). The metapopulation approach was useful in understanding the occupancy pattern and persistence of E. aurinia within this landscape. …
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The effects of climate and habitat on Butterfly populations
… effects of climate and habitat of butterfly populations are examined to understand the implications of environmental change for these, and other, insect taxa. It is found that first appearance (phenology) of most British butterflies has advanced in the last two decades and is …
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How does a butterfly embryo cope with environmental stress?
Butterfly abundance and species diversity have been in decline and several anthropogenic factors have been implicated in the observed downwards trend. This thesis focusses on environmental stress directed at butterfly eggs, using the model systems Pararge aegeria and Bicyclus anynana. Eggs are a …
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A survey of butterfly diagrams for knots and links
1 PDF file (ix, 93 pages)
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In vivo imaging and morphogenesis of butterfly scale development
During metamorphosis, the wings of a butterfly sprout hundreds of thousands of scales with intricate micro- and nanostructures that determine the wings' optical appearance, wetting characteristics, thermodynamic properties, and aerodynamic behavior. This strategy—of enabling multifunctionality by …
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Host use, mutualism and parasitism in the Lycaeides butterfly complex
Changes in host use in herbivorous insects can lead to diversification, speciation, and changes in other ecological interactions. In the first chapter, larval performance was investigated in three species of Lycaeides butterflies and placed into the context of other already studied ecological …
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On the Performance of Butterfly Approximations on the Graphcore IPU
… machine learning workloads with a focus on Butterfly Approximations for sparsification. It is found that the IPU can outperform a comparable GPU by up to a factor of 4.5, with the main bottleneck being limited memory.
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The butterfly clock : illuminating the molecular mysteries of monarch migration
Each fall, the entire monarch butterfly population of the Eastern United States and Canada funnels into a handful of oyamel pine groves in Michoacan, Mexico, to weather the winter months. Each spring, the butterflies mate and fly north to repopulate the continent in short generational bursts. The …
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The Effect of Butterfly Inspired Scales on Wing Tip Vortex Development
… focusing on insects such as the Monarch butterfly (Danaus Plexippus) since it performs the longest known butterfly flight migration. This experiment focuses on the scale patterning found on the wing tips, where scales are three times the size of the traditional scales that coat the wing …
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An evaluation of the effectiveness of a commercial butterfly breeder seminar
… the effectiveness of a Beginning Commercial Butterfly Breeder Seminar, a training workshop based on evidence-based best practices for rearing butterflies. The evaluation examined participant experience in the workshop, knowledge gained, and any changes in their professional practice. An …
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Temporal variation in fruit-feeding forest butterfly communities in Sabah, Borneo.
… investigated temporal variation in fruit-feeding butterfly communities in Sabah, Borneo. Fruit-baited traps were used to sample butterflies in primary forest and forest that had been selectively logged 11-12 years previously in 1988 and 1989. Traps were hung 1-2m from the ground along four …
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The Geographic Mosaic of Wolbachia Infection in Melanitis leda Butterfly Populations
<p>Insects are the most species-rich multicellular taxon on the planet, and it is estimated that more than half of all insect species are infected with the endosymbiont <em>Wolbachia</em>. This bacterium can manipulate the reproduction of its host and potentially affect host evolution. Most surveys …
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The butterfly people, and their impacts on the creatures they love
… with butterflies. On-site research observing butterfly collectors, breeders, museum curators, photographers and conservationists was conducted, along with historical and biological research. The effect of humans on butterflies was also analyzed, and it was discovered that enthusiasts often …
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