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 20 for “"wintering grounds"”.
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Behavioral choices of male humpback whales (Megaptera novaeangliae) on the Hawaiʻian wintering grounds
… to mate. The North Pacific has three main wintering grounds: Hawaii, Mexico/California, and Japan (Dawbin, 1966, Darling and Jurasz, 1983; Baker, Herman, Perry, Lawton, Straley, Wolman, Kaufman, Winn, Hall, Reinke, and Ostman, 1986). Currently, approximately 4,500 humpback whales migrate …
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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
… trends and whether factors on breeding and/or wintering grounds could be causing these declines remain unclear. The main objective of this study was to investigate causes of differential population dynamics experienced by Barn Swallows in North America by 1) studying patterns of migratory …
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Landscape Scale Habitat Associations of Sprague's Pipit (Anthus Spragueii) Overwintering in the Southern United States
… done on Sprague’s Pipit especially on their wintering grounds. There is no complete account of their historic wintering range and there is also limited knowledge about the status of their current wintering range in the United States and Mexico. On the breeding range, Sprague’s Pipits seem …
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Winter habitat use by Blackburnian Warblers (Dendroica fusca) in Los Amarillos, Colombia
… (Dendroica fusca) were observed in their wintering grounds in a High Andean native secondary forest in Colombia between September 1993 and May 1994. The main objective of the study was to determine the relationships between the Blackburnian Warblers and the habitats where they were found. …
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Changes in Avian Capture Rate and Migration Phenology Across 37 Years at a Coastal Barrier Island in Georgia
… human-caused habitat change on breeding and wintering grounds are likely the primary drivers of lowered capture rates. Rising temperatures on breeding grounds are extending growing seasons and are suspected to be a primary driver influencing migration phenology trends. This research …
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Nocturnal Habitat Selection During Spring Migration by American Woodcock (Scolopax minor) in Central Kentucky
… research has occurred on breeding and wintering grounds, little is known about spring migratory ecology. This study assessed nocturnal roosting habitat of American woodcock through the use of night spotlighting techniques. The study was conducted on the Blue Grass Army Depot and the …
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Estimating occupancy and abundance of shorebirds through aerial surveys in the Illinois river valley
… migrate long distances between northern breeding grounds and southern wintering grounds, and many need to stop and refuel along the way. The Illinois River Valley (IRV) serves as a crucial stopover area for migratory shorebirds in the midwestern United States despite the high prevalence of row …
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The Role of Breeding Habitat Loss in the Decline of Eastern Whip-Poor-Will (Antrostomus Vociferus) Populations in Canada
… factors, such as habitat loss on the wintering grounds or declines in available insect prey, have also contributed to the population declines of this species in Canada.
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Reproductive success and survival of the Common Grackle in central Illinois
… in the non-breeding season, particularly on the wintering grounds, and investigating potential sources of mortality.
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Survival and Overland Transport of Fecal Coliform under Canadian Prairie Conditions
… management. Despite the economic advantages; wintering grounds for livestock operations can have profound impacts on water quality. Animal waste accumulated during winter can be transported to surface water with spring snowmelt. The potential impact on snowmelt runoff quality of winter …
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Aspects of American Bittern Ecology in Northwest Minnesota
… NWR, as well as other physiographic regions and wintering grounds, is needed to conclusively identify factors responsible for bittern population declines.</p>
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The use of ringing data in the study of climatic influences on common passerines
… to climatic stochasticity in breeding and wintering grounds, and during migration. In a population of African Reed Warblers Acrocephalus baeticatus (an azonal wetland specialist) a capture-mark-recapture model correlated higher temperature in the breeding grounds with higher adult survival …
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Migratory Ecology and Movement Patterns of Mid-Continent and Eastern Sandhill Cranes
… on their breeding areas and autumn staging grounds; and 2) characterize the fine-scale movements and behavior of cranes after their arrival on breeding grounds in the spring until fall staging. We captured and attached Global Positioning System–Global System for Mobile Communications …
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Conserving Montana's sagebrush highway: long distance migration in sage-grouse
… food source in newly identified sage-grouse wintering grounds will help to conserve this migratory population. Conservation easements provide a mechanism for maintaining privately-owned working ranches as a compatible and desirable alternative to sodbusting or subdivision along a sage-grouse …
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Conserving Montana's sagebrush highway: long distance migration in sage-grouse
… food source in newly identified sage-grouse wintering grounds will help to conserve this migratory population. Conservation easements provide a mechanism for maintaining privately-owned working ranches as a compatible and desirable alternative to sodbusting or subdivision along a sage-grouse …
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Wintering Ecology of Buff-Breasted Sandpipers (Tryngites subruficollis) in Southern Brazil
… Yet, little is known about their ecology at wintering sites and about their population dynamics. In this dissertation, I present results on within- and among-year density trends, life-history strategy, molt, body condition and population dynamics of Buff-breasted Sandpipers wintering in …
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Effects of Hurricane Disturbance on the Stopover Ecology of Intercontinental Landbird Migrants in Coastal Louisiana
… breeding areas and subtropical and tropical wintering grounds, and movement in relation to the Gulf of Mexico (GOM) is a conspicuous and important part of that migration system. During inclement weather or winds inconsistent with travel direction, migratory birds oft.en/a/lout and concentrate …
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Assessment of Factors Influencing Migratory Landbird Use of Forested Stopover Sites Along the Delmarva Peninsula During Autumn Migration
… a time when billions of birds move from breeding grounds in North America to wintering grounds in Central and South America, with many individuals relying on stopover habitats en route for resting and refueling purposes. These stopover sites are critical to the survival of the hundreds of species …
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Prevalence and Genetic Characterization of Avian Influenza Virus in Ring-billed and Franklin's Gulls in Minnesota
… through areas with poultry farms, to their wintering grounds. This finding, coupled with the reported presence of gulls of all species loafing and foraging near poultry dense areas of Minnesota, warranted further targeted surveillance efforts of other related species, in particular the FRGU. …
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Community Compostition and Microhabitats of Macroinvertebrates on Sandbars within the Lower Missouri River as a Food Source for Foraging Migratory Shorebirds
… of shorebirds migrate between breeding and wintering grounds through interior North America every year. There are documented cases of significant threats to 36 species (72%) during migration. Migratory shorebirds need stopover sites to refuel for the final stages of their journey and one …