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 14 of 14 for “"host preferences"”.
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Life cycle and host preferences in the Agapanthus borer (Neuranethes spodopterodes)
… Some species of Agapanthus are the preferred host plant for oviposition by the female N.spodopterodes. Agapanthus inapertus, Agapanthus caulescens and Agapanthus praecox are the most infested with the Agapanthus borer eggs. Leaf sizes do not appear to be a factor that influences the female …
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Life cycle and host preferences in the Agapanthus borer (Neuranethes spodopterodes)
… Some species of Agapanthus are the preferred host plant for oviposition by the female N.spodopterodes. Agapanthus inapertus, Agapanthus caulescens and Agapanthus praecox are the most infested with the Agapanthus borer eggs. Leaf sizes do not appear to be a factor that influences the female …
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Reproductive traits, identity and host preferences of two genetic lines of the seedcorn maggot, Delia platura (Diptera : Anthomyiidae)
… Chapter 4 we aimed to evaluate their respective host associations by quantifying their degree of acceptance and preference when subjected to yellow onion, sweet corn, soy, radish, broccoli and a soil control in no-choice and choice experiments. In a no-choice setting, the N-line had a higher …
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Blood host preferences and competitive inter-species dynamics within an African malaria vector species complex inferred from signs of animal activity around aquatic larval habitats distributed across a gradient of fully domesticated to fully pristine ecosystems in southern Tanzania
… natural ecosystems, where these known preferred hosts are scarce or completely absent. This study investigated larval habitat occupancy and species composition of the An. gambiae complex, together with the availability of various potential mammalian blood host species, across a gradient of fully …
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A Hitchhiker’s Guide to Invasion Biology: Describing the Ecological Mechanisms Underlying the Range Expansions of Two Ixodid Tick Species
… and increasing populations of suitable host species and tick habitat. Few empirical studies have been performed, however, investigating the ecological mechanisms underlying these range expansions. Ticks are parasitic organisms that disperse across landscape by hitchhiking on hosts, but …
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Effects of habitat and plant volatiles on mosquito spatial, seasonal, and chemical ecology
… nectar, required for metabolic processes, and host odors, which will help them navigate towards hosts, source of the blood required for producing eggs. Mosquitoes interpret and respond to chemical volatiles very differently depending on their environment (temperature, humidity, time of day, …
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The Plant Diet of Mosquitoes: Sugar Feeding on Ornamentals and Wildflowers
… residential Blacksburg, VA, and identified their preferences for commonly planted flower species. Based on this information, we then confirmed the rate of sugar feeding on the attractive flower goldenrod (Solidago spp.) in the wild and explored its attractive qualities with the intent of …
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Are Weevils Picky Eaters? Community Structure and Host Specificity of Neotropical Saproxylic Beetles (Coleoptera: Curculionidae)
… to other decomposers. Understanding beetle host preferences and patterns of community assembly is critical for their conservation, and for predicting which species might become invasive. This project aims to investigate the ecological and host specificity, as well as the community …
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Vertical activity, host preference, and population studies of adult Culicoides (Diptera: Ceratopogonidae)
… used to investigate the vertical activities and host preferences of Culicoides species in a forest in Giles County, Virginia. Using ropes and pulleys, rabbit and turkey-baited traps were positioned at ground level, 25, and 50 feet elevation in a forest tree so as to give Culicoides choices of …
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Comparative Genome Analysis of Three Brucella spp. and a Data Model for Automated Multiple Genome Comparison
… species with different virulence patterns and host preferences enabled investigation of the genomic basis of virulence. In the B. suis genome, seventy-one differentiating genes were found, including a contiguous 17.6 kb region unique to the species. Although only one unique species-specific …
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Structural and functional advances in the evolutionary studies of cells and viruses
… in the replication strategies, morphologies, and host preferences of extant viruses, we recovered a conserved and ancient structural core of protein domains that was shared between cellular organisms and distantly related viruses. This core together with an analysis of the evolution of virion …
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Mimicry and speciation in the parasitic finches of Africa
… whydahs (genus Vidua), that occur across Africa. Host colonisation is tightly linked to speciation in Vidua because of their remarkable capacity to imprint on their hosts, with mating traits and host preferences being influenced by the parasite's early environment. The challenge of explaining why …
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Bionomics of Epiphyas postvittana, Ctenopseustis obliquana, Planotortrix excessana (Lepidoptera: Tortricidae) and Stathmopoda "skelloni" (Lepidoptera: Stathmopodidae) on apple cv 'Dougherty' in Auckland
… time. The general biology, distribution and host range of these four species is described. A key to the larvae of the four species, as found on ‘Dougherty’, using head capsule measurements together with other characters, and keys to the leafroller eggs and pupae are provided. A technique to …
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Taxonomy, phylogeny and resource use of Glyptapanteles (Hymenoptera: Braconidae, Microgastrinae), genus highly diversified in the Neotropics
… role in regulating their lepidopteran host populations and in maintaining high biological diversity in terrestrial ecosystems. A reliable revision for the Neotropics has not yet been attempted and many Glyptapanteles species remain undescribed. The scarcity of both taxon sampling and …