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 37 for “"Wild birds"”.
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Factors affecting the accumulation of pentosidine in the skin of wild birds
Birds have few reliable indicators of aging. Pentosidine (Ps), a biomarker of aging, is a product of non-enzymatic glycation, which accumulates in the tissues of an animal over its lifespan. The intent of this study was to determine if comparable change in Ps concentrations could be established in …
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Influences of Anthropogenic Noise on Flight Initiation Distance, Foraging Behavior, and Feeder Community Structure of Wild Birds
<p>Throughout the world, birds represent the primary type of wildlife that people experience on a daily basis. However, a growing body of evidence suggests that alterations to the acoustic environment can negatively affect birds as well as humans in a variety of ways, and altered acoustics from …
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Determining the Pathogenesis and Enzootic Transmission of Usutu Virus
… can cause neurological disease in humans and wild birds. USUV is maintained in an enzootic cycle between wild birds, primarily passerine species, and ornithophilic mosquitoes, predominantly Culex spp. mosquitoes. Since its first isolation in 1959 in South Africa, USUV has spread throughout …
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From nest building to life-history patterns: does food supplementation influence reproductive behaviour of birds?
Supplementary feeding wild birds is a widespread phenomenon. Recently, non-governmental organisations have recommended that the bird-feeding public should feed wild birds throughout the breeding season. Currently, such recommendations are not supported by a large body of research findings to …
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Effects of Bird Feeder Density on the Behavior and Ecology of a Feeder-Dependent Songbird: Patterns and Implications for Disease Transmission
Anthropogenic resource provisioning of wildlife has increasingly been hypothesized to alter pathogen spread. Although bird feeding is the most widespread form of intentional wildlife provisioning, we know relatively little about how the degree of anthropogenic feeding at a site impacts wild birds …
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Identificação de parasitos gastrointestinais em aves silvestres apreendidas em fiscalizações preventivas integradas, Bahia, Brasil
… for environmental conservation and combating wildlife trafficking. Animals that are victims of trafficking, meaning those kept in captivity, often live in unsanitary conditions, which fosters the development of diseases caused by gastrointestinal parasites. This study aimed to identify the …
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A Comparison of Image Processing Techniques for Bird Detection
… fruits and vegetable crops are vulnerable to wild birds and animals. These wild birds and animals can cause critical damage to the produce. Traditional methods of scaring away birds such as scarecrows are not long-term solutions but short-term solutions. This is a huge problem especially near …
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Immunological and hematological biomarkers for contaminants in fish-eating birds of the Great Lakes
… and population-level problems in fish-eating birds of the Great Lakes. Other studies have shown that perinatal exposure to HAHs causes thymic atrophy and suppresses T lymphocyte function in laboratory animals. Higher exposure suppresses antibody production and alters white blood cell (WBC) …
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Phylogenetic approaches for quantifying the genotypic diversity of influenza viruses
Wild aquatic birds are thought to be the main reservoir for Influenza A viruses, hosting the largest burden of influenza diversity generated by high frequencies of co-infection and segment reassortment. The recently emerged avian influenza viruses that spilled-over into the human population were …
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Epidemiology and risk factor analysis of avian influenza virus
… the relationship between HPAI occurrences in wild/aquatic birds and poultry species in Greece and the Anseriformes population, the Charadriiformes population, precipitation, temperature, poultry population density, human population density, distance to the closest highway and water collection …
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Effects of lead ingestion on the immune function in quail
Wild birds can be exposed to high concentrations of lead caused by spent lead shot and industrial waste. The immunosuppressive effects of lead have been demonstrated in laboratory mammals, but little research has been conducted in birds. Because immunocompetence is important for survival, the …
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Bioacoustic Studies of Population Size and Microdialects in an Island-Living Savannah Sparrow Population
… for studying the behaviour and ecology of wild birds. In this thesis I use bioacoustic monitoring as a tool for studying Savannah Sparrows (Passerculus sandwichensis). In my first data chapter, I tested the accuracy of passive acoustic monitoring in estimating population size and annual …
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Satiety induced by neuropeptide FF and gastrin in birds
… the effects of anorexigenic neuropeptides in birds will lead to the development of novel treatment options for appetite-related diseases and increased understanding of factors that affect production efficiency in commercial poultry and survival/resource allocation in wild birds.
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Matrix Gene Splicing and Emergence of Highly Pathogenic Avian Influenza
… and reassorted with circulating viruses in wild birds. This outbreak resulted in culling of 50.5 million commercial birds. However, rapid response and stamping out procedures were essential in preventing endemicity. In 2021 viruses from the Gs/GD lineage invaded North America. Similar to the …
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Characterization of influenza A virus evolution in laboratory hosts
… hosts including humans, swine, poultry, and wild birds. The surveillance samples are screened by various methods, but ultimately the isolates that are positive for IAV are propagated in a laboratory host prior to genome sequencing and characterization. Previous research has shown that …
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Evaluation of the potential functions of Avian paramyxovirus Accessory proteins
… isolated from a wide variety of domestic and wild birds. APMV-1/Newcastle disease virus (NDV) is the most characterized and globally important avian pathogen, because of the huge economic loss associated with the disease. However, very little information is known about the pathogenicity of …
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Effects of Urbanization on the Avian Community of Oak Woodlands
… a myriad of effects on both native habitat and wildlife. In birds, these effects can have a variety of negative impacts on behavior and physical health. Habitat degradation, largely through various forms of pollution, leads to impaired immune responses, increased stress levels, altered behavior, …
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Examining the effects of environmental compounds on influenza virus ecology
… in viruses that previously circulated among wild aquatic birds, which are the natural reservoir for the virus. IAV can also jump from wild birds into other animals including marine mammals. This thesis explores the effects of environmental compounds, including bacteria and pollutants, on the …
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Dna Profiling of Captive Roseate Spoonbill (Ajaia Ajaja) Populations As a Mechanism of Determining Lineage in Colonial Nesting Birds.
Roseate spoonbills are colonial nesting birds with breeding grounds extending from the United States Gulf coast to the pampas of Argentina. The U.S. population suffered a severe bottleneck from 1890 to 1920. The population's recovery was slow and partially credited to migrations from Mexican …
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