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 92 for “"Songbird"”.
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Songbird migration ecology in east-central Illinois
Embargo set by: Seth Robbins for item 89508 Lift date: 2017-09-29T20:50:34Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Predictive Novelty Detection in Songbird Auditory Cortex
In order to make sense of complicated sensory landscapes, the brain privileges the processing of novel stimuli. Detecting novelty is therefore a fundamental problem for the brain to solve. And it turns out to be complicated, as stimuli can be completely novel, or just novel relative to certain …
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Songbird community ecology and habitat selection in the Chicago area
… how do exotic shrub invasions impact woodland songbirds within urban landscapes? and (2), how do bird communities change across forest-suburb boundaries? Field work was conducted in the Chicago metropolitan area during the breeding seasons of 2010 and 2011. I found that even though measures of …
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Rapid social regulation of 3β-HSD activity in the songbird brain
… by social encounters in seasonally breeding male songbirds. In Experiment 1, I looked at the long-term seasonal regulation of brain 3β-HSD activity. 3β-HSD activity was highest in the non-breeding season compared to the breeding season and molt. In Experiment 2, I hypothesized that brain 3β-HSD …
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Post-breeding public information use in a ground-nesting songbird community
… PI cues used by Veeries and other ground-nesting songbirds (i.e., Ovenbirds [Seiurus aurocapilla]) for territory establishment in subsequent breeding seasons. Moreover, I hypothesize that ground-nesters integrate multiple social cues sampled throughout the breeding season when selecting future …
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Dynamic Modulation of an Immediate -Early Gene in the Songbird Forebrain
"In the nervous system, immediate-early gene (IEG) induction is observed following exposure to salient events. Although the function of IEGs is not fully understood, one prominent model suggests that they are needed to consolidate memories of the inducing event---a ""feed-back"" model. However, a …
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Natal dispersal and first-year survival in a neotropical migratory songbird
… affect first-year survival in a migratory songbird.
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Algorithms and circuits for motor control and learning in the songbird
… questions in a model of skill learning - the songbird. In the first part of my thesis, I develop a computational model of song learning. This model incorporates a dopaminergic reinforcement signal in VTA and dopamine-dependent synaptic plasticity in the singing-related part of the basal …
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Emerging Auditory Selectivity in the Caudomedial Neostriatum of the Zebra Finch Songbird
… responses in awake, behaving zebra finch songbirds, I have demonstrated that the caudomedial neostriatum (NCM), a telencephalic nucleus in the ascending auditory pathway, exhibits responses that range from unselective to highly selective for species-specific stimuli. Sites demonstrating …
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Ecological Factors Associated With Songbird and Small Mammal Predation by Texas Ratsnakes
Predator-prey relationships have received extensive theoretical and empirical attention although the majority of studies have focused exclusively on prey. In studies of avian ecology, predation is the primary cause of nest failure and yet few studies examine predators directly. For my dissertation, …
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Mechanisms underlying population dynamics of a migratory songbird in a fragmented forest
… as a cause of long-term changes in migratory songbird populations. Some problems associated with fragmentation are generally considered edge effects (nest predation and cowbird brood parasitism), whereas others are attributed to fragment size and isolation (low pairing success, area …
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Impacts of non-renewable resource extraction on shrubland songbird nest success and abundance
Shrubland songbirds are a highly imperiled guild across much of North America due to wide-scale land use changes and resulting loss of shrubland habitat. Land management practices which produce early-successional habitat, namely field abandonment and clearcut timber harvests, have become …
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Songbird Brain Organization and its Molecular Convergence with Humans for Vocal Imitation Learning
… cell types involved in vocal imitation between songbirds and humans. Convergent gene expression patterns and connectivity exist between primary motor regions in the human (laryngeal motor cortex, LMC), and songbird (robust nucleus of the arcopallium, RA) controlling the vocal organs. However, it …
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Analysis of Immediate-Early Gene Expression in the Songbird Brain Following Song Presentation
<p>The song system of oscine songbirds consists of the auditory and motor pathways used in the acquisition and production of learned song and provides powerful material for the study of neuronal and behavioral plasticity, both developmentally and during adult life. The purpose of this thesis is to …
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Brain and Cognitive Consequences of Early-Life Immune System Challenge in a Songbird
Cognition, defined as the mechanism by which an animal acquires, processes, stores, and uses information present in the environment, is a trait that is sensitive to developmental conditions. Existing research supports the idea that the ability to develop and maintain cognitive abilities depends on …
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Effects of urbanization on the physiology, behavior, and fitness of a wild songbird
As urbanization spreads, understanding its impact on wildlife is increasingly urgent. By comparing the traits and fitness of individuals within the same species found in both urban and rural habitats (urban adapters), we can better understand the behavioral and physiological coping mechanisms wild …
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Measuring the exposure of Songbird Nestlings to Neonicotinoids in Natural and Agricultural Nest Sites
Neonicotinoid insecticides such as imidacloprid (IMI) have been under scrutiny for their damage on non-target invertebrates. However, recent literature suggests that grassland birds are experiencing population declines concurrently with increased IMI use. Field research was conducted to test the …
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Effects of prescribed fire on breeding forest songbird abundances in central and Southern Illinois
The proliferation of shade-tolerant trees such as maple (Acer spp.) in Midwestern forests is a challenge that forest managers must overcome to retain forests in their oak- and hickory-dominated status. Prescribed fire is one of the tools that forest managers use to meet this challenge. While the …
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