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 38 for “"Swallows"”.
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Colony site selection in bank swallows
… Comparison of 60 banks used by Bank Swallows with the 349 unused sites showed that taller, vertical, more recently excavated sites with sand or fine gravel soils and no obstructions in front of the bank were selected. Colony size, which ranged from 1 to 48 pair with a mean of 7.7 …
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Niche Differentiating Mechanisms in Two Sympatric Species of Swallows
… certain aspects of the ecologies of cliff swallows (Petrochelidon pyrrhonota) and bam swallows (Hirundo rustica) in an area of overlap, where both species are found nesting together and foraging over the same fields. Careful attention was given to foraging flight patterns, foraging …
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Factors influencing pre-fledging mass recession of nestling Tree Swallows
… to pre-fledging mass recession by nestling Tree Swallows (Tachycineta bicolor). My study was conducted during the 2015 breeding season at the Blue Grass Army Depot in Madison County, Kentucky. Nestling Tree Swallows (n = 127) in 29 broods were divided into half-weighted (n = 32), full-weighted (n …
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Niche segregation among three sympatric species of swallows in southern Ontario
Barn Swallows (Hirundo rustica), Cliff Swallows (Petrochelidon pyrrhonota) and Tree Swallows (Tachycineta bicolor) breed sympatrically in southern Ontario but it is unclear how these species differ ecologically, and their coexistence implies niche segregation. I investigated potential interspecific …
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Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (tachycineta Bicolor)
… the vocal responses of cavity-nesting adult Tree Swallows (Tachycineta bicolor) to different nest predators, some able and others unable to enter nest cavities, and to examine the responses of nestlings to those vocalizations. My study was conducted from April to July 2016 at the Blue Grass Army …
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Trophic transfer of contaminants in tree swallows (Tachycineta bicolor) nesting near Lake Calumet, Illinois
Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:34Z
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A Quantitative Analysis of the Geomorphic Agency of the Mud-Nesting Swallows in Central Texas
… deposition conducted by the three mud-nesting swallows of Central Texas, namely the barn swallow (Hirundo rustica), the cave swallow (Petrochelidon fulva), and the cliff swallow (Petrochelidon pyrrhonota). The study area for this research is within the city limits of San Marcos, Texas, which …
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The causes and consequences of variation in the cloacal microbiome of tree swallows (Tachycineta bicolor)
… To explore these questions, I studied tree swallows (Tachycineta bicolor), a socially monogamous bird in which both females and males engage in extra-pair mating activity. I focused on the cloacal microbiome as it is the site of contact during mating, and thus where microbes can be sexually …
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Nestling Diet, Quality, and Post-fledging Survival: Comparing Two Species of Aerial Insectivores in a Gradient of Agricultural Intensity in Saskatchewan, Canada
… approach between two sympatric species, Barn Swallows (Hirundo rustica) and Tree Swallows (Tachycineta bicolor), following a scale-of-effect approach, I investigated whether the intensity of agriculture was associated with parental selection of prey resources, nestling body condition and …
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Citizen science reveals complex changes in barn swallow phenology in South Africa over three decades
Palearctic migrants, including barn swallows Hirundo rustica, responded to climate change in Europe from the mid to late 1900s with phenological changes, mostly showing earlier arrival and start of breeding. During this period, barn swallows in the Palearctic exhibited variable patterns of change …
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Colony structure and function in the Bank Swallow, <i>Riparia riparia</i>, L.
… seasons of 1975 and 1976.</p> <p>The first swallows to arrive at the colony site located their burrows in small groups high on the bank face. Succeeding burrows were begun over a period of 20 to 30 days in positions surrounding the first burrows and at distances from them. Banding and wing …
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Biology and conservation of the endangered Bahama Swallow (Tachycineta cyaneoviridis)
… By locating and monitoring nests, I found that swallows rely on woodpecker-excavated cavities in pine snags and utility poles, and that swallows nesting in pine snags had higher fledging success (92%) than those nesting in utility poles (50-62%). Using a cavity nest-web approach, I assessed how …
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Passerine Exposure to Metal Contaminants from Oilsands Mining in the Athabasca Region of Northeastern Alberta, Canada
… metal concentrations in whole blood of tree swallows (Tachycineta bicolor), Tennessee warblers (Oreothlypis peregrina), and chipping sparrows (Spizella passerina). Additionally, I measured metal concentrations in kidney, liver, and stomach contents of nestling tree swallows, and monitored …
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Designing a Quantitative Videofluoroscopic Analysis Approach in Infants with Spinal Muscular Atrophy Type 1
… every swallow observed, selecting a sample of swallows, and manually selecting the worst integrity swallow for physiologic measures. Methods: 30 VFSS from infants with SMA 1 were quantitatively analyzed by a trained rater. To determine the optimal analysis method, the rater measured …
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Evaluating The Relationship Between Diadochokinesis And Severity Of Dysphagia As It Relates To Forced Vital Capacity In Individuals With Amyotrophic Lateral Sclerosis
… cracker. Pharyngeal residue, PAS and number of swallows per bolus was rated by two independent investigators. Between-group findings included significant impairment in function in the ALS group on all clinical measures and all swallowing severity ratings with the exception of the smallest liquid …
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Indirect effects of agricultural intensification on tree swallow (Tachycineta bicolor) foraging behaviour, body condition, and physiology
… – have exhibited sharp declines, with tree swallows (Tachycineta bicolor) experiencing a 2.8% annual decline in Canada since 1989. The timing of these declines coincides with major changes in agriculture, perhaps signaling a potential causal link. Declines may be influenced indirectly by …
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Reasonability of gastro-oesophageal reflux study requests (contrast swallows and milk scans) for the detection of gastro-oesophageal reflux disease at Red Cross War Memorial Children's Hospital - a retrospective analysis
… (commonly known as milk scans) and contrast swallows. The specific points assessed were reasonability of the request, appropriate timing of the investigation, use of the correct modality for the question investigated and lastly evaluation of prior treatment with antacids. We found that most …
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Migratory connectivity and differential patterns of decline in Barn Swallow (Hirundo rustica) in North America: Potential effects of factors on breeding and wintering grounds
… population dynamics experienced by Barn Swallows in North America by 1) studying patterns of migratory connectivity of populations using a three stable isotope approach (δ2H, δ13C and δ15N) and 2) evaluating evidence for factors on breeding and/or wintering grounds causing regional …
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Evolution in the Cornbelt : how a few special species are adapting to industrial agriculture
… Here are the stories of three species-cliff swallows, western corn rootworms, and prairie deer mice-that natural selection has reshaped to thrive in the new agricultural landscape. With his finches, Charles Darwin read the record of evolution in the past. In the Corn Belt, today's scientists …
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Choice in Human Breastfeeding Infants
… spent feeding on each breast, (2) the number of swallows on each breast, and (3) the amount of milk consumed on each breast. These data, configured as proportions of (1) and (2) relative to (3) for each feeding session, served as the basic evidence for matching, undermatching, and overmatching.
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