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 363 for “"beetle"”.
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THE EVOLUTION OF BEETLE BIOLUMINESCENCE
… examines the evolution of bioluminescence in beetles. The study utilises two enzymes implicated in the bioluminescent reaction of fireflies and glow-worms; the protein luciferase and the luciferin regenerating enzyme (LRE). A range of parallagous genes for both enzymes were identified in …
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Mountain Pine Beetle Detection using IoT
… an IoT system for real-time Mountain Pine Beetle (MPB) infestation detection using bioacoustic recognition via deep learning techniques. First, we present the design of the IoT system and describe its various hardware and software components. We built our IoT device using LoRa communication …
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Tropical Pyramids: Dung Beetle Richness, Abundance, and Biomass
… continuous forest, I found two important trends; beetle biomass and species richness increased with fragment area per sampling effort. Comparing all four studies, diversity increased with fragment size, and by my rarefaction analyses, two studies demonstrated beetle volume increased with fragment …
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The evolution and specialized metabolism of beetle bioluminescence
… (Lampyridae) and certain other families of beetles including the American railroad worms (Phengodidae), Asian starworms (Rhagophthalmidae), and American click-beetles (Elateridae), produce light in a process known as bioluminescence. The bioluminescent systems of beetles, natively used for …
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Mountain pine beetle outbreaks in high elevation whitebark pine forests: the effects of tree host species and blister rust infection severity on beetle productivity
In recent years, the mountain pine beetle (MPB, Dendroctonus ponderosae) has caused dramatic levels of mortality of whitebark pine (Pinus albicaulis). This keystone and foundation tree species is also being killed by the exotic fungus, Cronartium ribicola, which causes the disease white pine …
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Mountain pine beetle outbreaks in high elevation whitebark pine forests: the effects of tree host species and blister rust infection severity on beetle productivity
In recent years, the mountain pine beetle (MPB, Dendroctonus ponderosae) has caused dramatic levels of mortality of whitebark pine (Pinus albicaulis). This keystone and foundation tree species is also being killed by the exotic fungus, Cronartium ribicola, which causes the disease white pine …
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Modeling Endemic Bark Beetle Populations in Southwestern Ponderosa Pine Forests
Bark beetle populations phase between epidemic, outbreak levels, and low population density, endemic levels. The majority of scientific research is focused on outbreak populations because of the associated economic, ecological, and social impacts. Endemic populations are rarely studied but could …
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Clock-based segmentation in the red flour beetle Tribolium castaneum
… provide positional information. However, in the beetle Tribolium castaneum and most other insects, a number of anterior segments form in the blastoderm, and the remaining segments form sequentially from a posterior growth zone during germband elongation. In this work, I show that segmentation at …
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Fear of the Colonized Other in Richard Marsh's The Beetle
… argues Richard Marsh’s Victorian novel The Beetle offers a critique of British colonial practices through the reverse colonization experiences had by British characters in the novel. Intrusive, exploitative actions perpetrated by the British subjects in the novel invite reciprocal mental and …
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Vegetative communities as indicators of ground beetle (Coleoptera: Carabidae) diversity
… of a diverse group of invertebrates—the ground beetles (Coleoptera: Carabidae). Specifically, that (1) land units of the same classification contained similar carabid species assemblages and that (2) differences in species structure were correlated with variation in land unit characteristics, …
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Host plants of the tobacco flea beetle, Epitrix parvula F.
A study of the host plants of the tobacco flea beetle was made in Pittsylvania County from April 1 to September 23, 1939. The work was divided into field observations, rearing experiments end population studies. From field observations made throughout the season it was found that this insect fed …
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Flea Beetle Populations and Their Management on Vegetables in Virginia
Flea beetles (FB), (Coleoptera: Chrysomelidae), are common pests of cabbage and eggplant, but little is known about the FB populations in Virginia, their impact on yield, or the most effective control methods. This research investigates the FB populations and impact of their feeding injury on …
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Soil weathering under mountain pine beetle killed trees, Grand County, Colorado
… in soil weathering processes under mountain pine beetle killed trees, as compared to soil weathering under living trees. As pine beetle (Dendroctonus pondersoae) infected trees die, pine needles are shed and accumulate on the forest floor, which may lead to changes in soil pH and soil temperature …
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Timber supply and economic impact of mountain pine beetle salvage strategies
To address the scale mountain pine beetle (MPB) outbreak in British Columbia, salvage has become fully integrated with timber supply strategies. The objective of this thesis is to assess the economic impact of different salvage strategies depending on different attack levels, decay rates, and …
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Effects of host stored resources on bark beetle-fungal-conifer interactions
<p>Bark beetles and their associated fungi are among the greatest natural threats to conifers worldwide, but the degree to which host stored resources influence tree-beetle-fungal interactions has not been investigated. In western North America, the range of the mountain pine beetle (Dendroctonus …
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