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 12 of 12 for “"Monarch butterfly"”.
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A Re-examination of Reproductive Arrest in the Monarch Butterfly, Danaus plexippus.
Migratory and overwintering monarch butterflies, Danaus plexippus, are observed in a non-reproductive state classified as either reproductive diapause or oligopause. The stimuli that lead to this reproductive condition have been characterized as changes in photoperiod, declining host plant …
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Monarch Butterfly (Danaus plexippus) Tree Preference and Intersite Movement at California Overwintering Sites
<p>Managing Monarch butterfly overwintering groves: making room among the eucalyptus</p> <p>Proper management and conservation of the coastal California overwintering sites used by western Monarch butterflies <em>(Danaus plexippus </em>L.) is critical for continued use of these sites by monarchs. …
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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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The Effect of Butterfly Inspired Scales on Wing Tip Vortex Development
… solutions, 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 …
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Population processes and patterns across scales
… observable patterns in three separate studies: monarch butterfly population dynamics in eastern United States, microbiota population dynamics in fly gut, and mating strategy dynamics in hybridizing species pairs. First, the dissertation tests whether a continental population decline of the …
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Landscape and Mechanistic Approaches to Describing Milkweed Habitat and Drought Tolerance and the Implications for Western Monarch Butterflies
… These species are host plants for the declining monarch butterfly (Danaus plexippus). Utilizing our model, we quantified milkweed cover and isolated relationships between milkweed area and monarch presence. Additionally, we theorized that maternal effects could play an important role in …
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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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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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Economic Aspects of Crop Pest Management and Monarch Conservation
… to grow milkweed on their non-cropland for Monarch butterfly conservation for various remuneration rates. I also approximate intrinsic motivation of farmers from their actual conservation data using reverse regression, distance discriminant analysis and control functions to test for …
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Selection of Overwintering Microclimate by Migratory Western Monarch Butterflies
… at multiple 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 …
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Bio-Inspired Multi-Spectral Imaging Sensors and Algorithms for Image Guided Surgery
… system is inspired by the ommatidia of the monarch butterfly, in which pixelated spectral filters are integrated with light sensitive elements. The pixelated spectral filters are fabricated via a carefully optimized nanofabrication procedure and integrated with a CMOS imaging array. The …
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Advancements in Isotopic Geolocation Tools for Insect Migration Research
… our understanding of insect migration, using the monarch butterfly Danaus plexippus (L.) and the painted lady butterfly Vanessa cardui (L.) as model systems. Studying insect migration is notoriously difficult given the small size, high abundance, and short lifespans of insects. Isotope geolocation …