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 10 of 10 for “"song sparrows"”.
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PATERNAL ATTRACTIVENESS AND PARENTAL INVESTMENT STRATEGIES IN SONG SPARROWS MELOSPIZA MELODIA
… I examined how mate attractiveness (based on song complexity and genetic dissimilarity) affects female mating tactics, offspring sex allocation, offspring growth rates and parental feeding rates in a wild population of song sparrows (Melospiza melodia melodia). Male song complexity appeared to …
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Behavior, Physiology, and Reproduction of Urban and Rural Song Sparrows (Melospiza Melodia)
… colonize novel habitats more generally. Using song sparrows (Melospiza melodia), a native songbird commonly found in urban areas, I explored responses to urbanization and the drivers and consequences of these responses with an eye toward understanding whether song sparrows had successfully …
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Song learning in the song sparrow (Melospiza melodia): ecological and social factors
During song learning, songbirds are exposed to many more songs then they keep for their final song repertoire and little is known about how or why a bird selects the particular songs he sings as an adult. These studies examine the social and ecological factors that influence song learning and …
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Effects of urbanization on the physiology, behavior, and fitness of a wild songbird
… differences between urban and rural living song sparrows (Melospiza melodia) to explore how song sparrows are adjusting to urban environments. In my first chapter, I investigated urban birds' termination of the glucocorticoid stress response by looking at their ability to reduce circulating …
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Rapid social regulation of 3β-HSD activity in the songbird brain
… vertebrates. However, some animals such as song sparrows (Melospiza melodia) are aggressive year-round, even during the non-breeding season, when gonads are regressed and systemic testosterone (T) levels are non-detectable. In contrast, levels of the prohormone dehydroepiandrosterone (DHEA) …
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Impacts of elk management and riparian condition on songbirds in Rocky Mountain National Park
… elk exclosures and riparian shrub condition on songbird density and occupancy. I found little support for a direct effect of elk exclosures on bird communities, with the exception of shrub nesting birds which occurred at higher densities within exclosures. However, the density and occupancy of …
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Urbanization affects environmental conditions for developing songbirds
… exposure, and high food intake requirements. Song sparrows (Melospiza melodia) are a model wild songbird system that persist in both urban and rural habitats, and have young that develop very quickly. I investigated how urbanization changes the arthropod community, how that in turn affects …
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Cities for birds, birds for cities: The urban ecology of birds across scales from global sampling to individual responses
… responses to human activity in an urban songbird. In Chapter 2, I describe and validate the Global Urban Bird Survey, a standardized acoustic monitoring protocol applied across multiple cities to generate spatially representative inventories of urban bird communities. Comparisons with …
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Grassland and Woodland Bird Occurrence and Habitat Selection in the Prairie-Forest Transition Zone of Minnesota
… Yellowthroats <em>(Geothlypis trichas)</em>, Song Sparrows <em>(Melospiza melodia)</em>, Red-winged Blackbirds <em>(Agelaius phoeniceus)</em>, Sedge Wrens <em>(Cistothorus platensis)</em>, and Bobolinks<em> (Dolichonyx oryzivorus)</em> were present on the most grassland points, while Eastern …
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Bird utilization of habitat in residential areas
… housing; (winter R²=0.37, spring R²=0.34). House sparrows (Passer domesticus) were also associated with areas of dense housing and utilized ornamental architectural designs; (winter R²=0.69, spring R²=0.96). Common grackles (Quiscalus quiscula) were most common in areas with abundant vegetation, …