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 14 of 14 for “"Tree swallows"”.
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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), …
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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 …
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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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The causes and consequences of variation in the cloacal microbiome of tree swallows (Tachycineta bicolor)
… diversity? 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 …
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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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Passerine Exposure to Metal Contaminants from Oilsands Mining in the Athabasca Region of Northeastern Alberta, Canada
… measured 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 …
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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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Indirect effects of agricultural intensification on tree swallow (Tachycineta bicolor) foraging behaviour, body condition, and physiology
… insects – 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 …
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Measuring the exposure of Songbird Nestlings to Neonicotinoids in Natural and Agricultural Nest Sites
… non-agricultural nests. Using urine samples from Tree Swallows (TRES) dosed with IMI, an HP LC-MS was used to determine the concentration of IMI its metabolite 6-chloronicotinic acid (6-CN) at 0, 3 and 6 hours after exposure. Though no IMI or 6-CN residues were found in SAVS or their food, dosed …
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Impact of Reconstructed Wetlands on the Tree Swallow (Tachycineta bicolor)
Tree swallow (Tachycineta bicolor) nestlings were used as a sentinel species to evaluate the bioavailability and effect of contaminants to terrestrial life at reconstructed wetlands, Kingman Lake and Kenilworth Marsh, on the Anacostia River. Nesting success, survival, growth and developmental …
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Incubation behavior, embryonic heart rate, and developmental variation within and among altricial bird species
… species, Eastern Bluebirds (Sialis sialis) and Tree Swallows (Tachycineta bicolor), exhibited lower EHR than the other species, while Dickcissels (Spiza americana) exhibited higher EHR than other species. Eastern Bluebirds also displayed greater nest temperature variation and a lower percent of …
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Determinants and Developmental Consequences of Organic Contaminant Uptake in Nestling Insectivorous Birds
… of nestlings of populations of three species - tree swallows (Tachycineta bicolour), purple martins (Progne subis) and house wrens (Troglodytes aedon) at Point Pelee National Park, Ontario, Canada and their contaminant contents. Another route of exposure in oviparous organisms is through their …
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Wax Myrtle and Myrtle Warblers: Reciprocal Specialization and its Consequences in a Temperate Fruit-Frugivore Interaction
… dispersers: myrtle warblers, gray catbirds and tree swallows. Myrtle warblers, the only documented disperser after December, provided the greatest quantitative dispersal services. Although the germination rate and time of ingested seeds were unaffected by species identity of dispersers, …
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Stress eating? Causes and consequences of variation in foraging behavior in a challenging world
… in a declining aerially insectivorous bird, the tree swallow (Tachycineta bicolor).In Chapter 1, I explore whether glucocorticoids affect total activity and offspring feeding rate. Birds with experimentally elevated corticosterone (the primary glucocorticoid hormone in birds) were initially less …