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 264 for “"Parasitism"”.
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Intracellular parasitism of macrophages by Cryptococcus
… demonstrate that such enhanced intracellular parasitism is directly linked to virulence in a murine model of cryptococcosis, suggesting that this ability might be the cause of the outbreak. Finally, application of high-density whole genome tiled arrays, confocal microscopy and mating assays …
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On the ecological transitions between parasitism and mutualism
… of interacting species, lying on a mutualism-parasitism continuum. Identifying the underlying mechanisms and context dependency of such ecological dynamics is essential to understand the responses of interacting species to rapidly changing environments. In this thesis, I investigate the …
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Studies on the parasitism of Thanatephorus cucumeris (Frank) Donk
v, 269 leaves : ill.
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Host recognition and fitness costs of avian brood parasitism
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Population ecology and parasitism in bumble bees (Hymenoptera: apidae)
The development of three colonies of Bombus fervidus (Fabricius) and two of Bombus pennsylvanicus (Degeer) was studied. Population levels and the production of males and young queens varied among colonies and between years. Mean longevity of worker bees decreased significantly toward the end of the …
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Host use, mutualism and parasitism in the Lycaeides butterfly complex
… the presence of mutualistic ants did not reduce parasitism rates. These studies highlight the importance of investigating ecological interactions, including interactions with other trophic levels, when studying host dynamics and diversification in herbivorous insects.
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Effects of water mite parasitism on Cenocorixa spp. (Heteroptera: Corixidae)
… dealt with parasite pressure implicates mite parasitism as a possible impetus in their speciation process.
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Plant-parasitic nematodes: from genomics to functional analysis of parasitism genes
… of R. similis. Numerous tags corresponding to parasitism genes with potential roles in, amongst other things, host localisation, detoxification, cell wall modification, and even putative host transcriptional reprogramming were identified. In addition, a tool to explore all available nematode …
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Prevalence and drivers of blood parasitism in African penguins (Spheniscus demersus)
… on the health of penguin populations. While parasitism of wild penguins has been poorly studied, susceptibility to infection with blood protozoa is well established in a wide range of penguin species held in captivity. This thesis assesses the prevalence of blood parasites in wild African …
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Avian brood parasitism as a model system for studying multispecies interactions
… species of host and hosts often subject to parasitism by multiple brood parasite species. With little attention paid to these more complex interactions, important opportunities to understand multispecies interactions go unrealised. In this thesis, I begin by establishing the extent of the …
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Parasitism, Predation Prediction: Modelling Variations in Ecological Interactions from Mechanisms to Networks
Ecological interactions are fundamental to ecology and evolution, regulating population dynamics as well as influencing the biodiversity and stability of communities. Intraspecific and environmental variations are often present in ecological interactions and are typically observable within the …
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Effect of female sex hormone on age resistance of chickens to parasitism
Call number: LD2668 .T4 1950 D49
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Effect of female sex hormone on age resistance of chickens to parasitism
Call number: LD2668 .T4 1950 D49
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Nesting aggregation as a Determinant of Brood Parasitism in Mason Bees (Osmia spp.)
… have the potential to increase rates of brood parasitism by attracting larger numbers of parasites to areas with aggregations of nests. I conducted a field study in subalpine meadows at the Rocky Mountain Biological Laboratory in Colorado, USA, to assess whether mason bees suffer increased …
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The Effects of Urbanization on Tick Parasitism Rates in Birds of Southeastern Virginia
… played an important role in predicting tick parasitism rates, as did bird life history traits, such as foraging and nesting behavior. The most common life stage and tick species collected from birds were larval rabbit ticks (Haemaphysalis leporispalustris), followed by larval bird ticks …
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Mermithid nematode parasitism of Aedes stimulans (Walker) (Diptera: Culicidae) from Ingham County, Michigan
Thesis (M.S.)--Michigan State University. Dept. of Entomology, 1966
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Identification of Sex and Parasitism via Chemical Cues by the Ozark Zigzag Salamander
… with the ectoparasitic mite Hannemania eltoni. Parasitism can impact both the behavior and metabolism of the host as well as the behavior of others towards the parasitized individual. I examined whether sex and parasitism of the cue donor and receiver influenced behavioral and metabolic …
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