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 7 of 7 for “"Haemorhous mexicanus"”.
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Behavioral Heterogeneity and Disease Dynamics in House Finches (Haemorhous mexicanus)
… examined the relationship between house finch (Haemorhous mexicanus) stress physiology, exploratory behaviors, and social behaviors in the wild. We provided evidence that more exploratory house finches interact with more individuals in the wild, and have higher baseline concentrations of …
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Effects of ambient temperature on mechanisms of pathogen transmission in house finches (Haemorhous mexicanus)
… songbird-pathogen system. House finches (Haemorhous mexicanus) are small songbirds that rely on bird feeders to meet thermoregulatory demands during winter. However, interactions with other birds at the feeder and contact with contaminated feeder surfaces are important sources of …
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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
… across the landscape in wild house finches (Haemorhous mexicanus), a feeder-dependent species subject to outbreaks of a contagious pathogen commonly spread at feeders. The local abundance of house finches was significantly higher at sites with high feeder density but, surprisingly, finches at …
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Understanding the Evolution of Emerging Bacterial Pathogens in Response to Host Resistance
… recently infected novel host the House Finch (Haemorhous mexicanus). Approximately 25 years ago this pathogen jumped from its established host in chickens into the wild passerine finch species, triggering an epidemic which has been well monitored from the outset We aim to address how …
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Infectious disease as a cause and consequence of phenotypic responses to challenge in a songbird species
… captive studies on wild-caught house finches (Haemorhous mexicanus) to elucidate how an animal might shift its phenotypes when presented with an ecological challenge. In the first experiment, I examined how nutritional stress during nestling development impacted the magnitude of house finch …
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The use of exponential random graph models to explore social foraging dynamics of interspecific songbird assemblages
… We compared foraging behaviors of house finches (Haemorhous mexicanus) captured with and without a bacterial disease (mycoplasmal conjunctivitis) to determine if infected birds differed in foraging activity, patterns of association with heterospecifics and conspecifics, and sociality (i.e., number …
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Exposure heterogeneity, host immunity and virulence evolution in a wild bird-bacterium system
Immunological heterogeneity is the norm in most free-living vertebrate populations, creating a diverse and challenging landscape for pathogens to replicate and transmit. This dissertation work sought to determine sources of immunological heterogeneity, as well as the consequences of this …