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.
Results
Showing 1 to 17 of 17 for “"tachycineta bicolor"”.
-
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 …
-
Exposition de l’hirondelle bicolore (Tachycineta bicolor) aux pesticides agricoles dans le Sud du Québec
… dans les proies (diptères) de l'Hirondelle bicolore (Tachycineta bicolor), et si cette contamination est associée à la disponibilité des proies le long d’un gradient agricole au Sud du Québec. Les mesures de contamination étaient basées sur les pesticides trouvés dans les boli alimentaires …
-
Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (tachycineta Bicolor)
… 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 Depot in …
-
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
-
The causes and consequences of variation in the cloacal microbiome of tree swallows (Tachycineta bicolor)
… 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 …
-
Indirect effects of agricultural intensification on tree swallow (Tachycineta bicolor) foraging behaviour, body condition, and physiology
… 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 …
-
Impact de l'intensification agricole sur l'effort parental, la croissance et la survie des oisillons chez l'Hirondelle bicolore (Tachycineta bicolor)
… espèce insectivore aérienne, soit l'Hirondelle bicolore ( Tachycineta bicolor ), le long d'un gradient d'intensification agricole situé dans le Sud du Québec. Pour ce faire, j'ai suivi la croissance de 1079 oisillons et analysé les comportements de quête alimentaire des parents en considérant la …
-
Niche segregation among three sympatric species of swallows in southern Ontario
… (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 differences in nestling diet and …
-
Passerine Exposure to Metal Contaminants from Oilsands Mining in the Athabasca Region of Northeastern Alberta, Canada
… 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 tree swallow …
-
Study of the microstructure and mechanical properties of hummingbird wing-bones
… hummingbird (Calypte Anna) and a tree swallow (Tachycineta bicolor) was conducted to determine whether the hummingbird bones exhibited unique features due to the high wing loading of the bird. It was hypothesized that the hummingbird's ability to hover, flapping its wings at an incredible rate, …
-
Incubation behavior, embryonic heart rate, and developmental variation within and among altricial bird species
… 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 time on the …
-
Étude de la sélection sociale chez l'Hirondelle bicolore
… et taille de ponte) de la femelle Hirondelle bicolore (Tachycineta bicolor) dans un contexte de compétition intraspécifique via le calcul de gradients de sélection linéaires. Pour ce faire, le succès reproducteur a été utilisé en tant que proxy de l’aptitude phénotypique. Le succès …
-
Factors influencing pre-fledging mass recession of nestling Tree Swallows
… 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 = 36), …
-
Stress eating? Causes and consequences of variation in foraging behavior in a challenging world
… 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 active and fed …
-
Nestling Diet, Quality, and Post-fledging Survival: Comparing Two Species of Aerial Insectivores in a Gradient of Agricultural Intensity in Saskatchewan, Canada
… 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 growth. Stable isotope data revealed Barn Swallows …
-
Effets combinés de l'exposition aux pesticides et à des parasites hématophages sur la physiologie des oisillons de l'Hirondelle bicolore
… sur des marqueurs physiologiques de l’Hirondelle bicolore (Tachycineta bicolor). Cet insectivore aérien, comme plusieurs autres espèces de ce groupe, a vu ses effectifs décliner de manière importante depuis les années 1970 et l’utilisation accrue de pesticides en milieu agricole figure parmi les …
-
Déterminants du recrutement local et de la dispersion natale chez une population d'hirondelle bicolore
… et de la dispersion natale chez l’Hirondelle bicolore (Tachycineta bicolor), un insectivore aérien migrateur qui présente des déclins importants de ses populations nichant dans le Nord-Est de l’Amérique du Nord. Chez cette espèce, ces processus restent méconnus et nécessitent une attention …