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 23 for “"Breeding Site"”.
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Terrestrial Movements and Habitat Use of Gopher Frogs (Rana capito) at Fort Benning, Georgia
… were radio-tracked between the 2000 and 2001 breeding seasons to study their terrestrial movements and habitat use in a longleaf pine- sandhill area on the Fort Benning Military Reservation, Georgia. The telemetry research was conducted in response to the need for biological data concerning …
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Demography of a declining Dunlin (<i>Calidris alpina arcticola</i>): influences on adult survival and mate fidelity of an Arctic-breeding migratory shorebird
… (<i>Calidris alpina arcticola</i>), an Arctic-breeding shorebird. Prior adult survival estimates (0.41– 0.60) appeared insufficient to maintain a stationary population, however, it was unclear if estimates were reflective of bias or a real survival signal. Additionally, C. a. arcticola mate …
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Seasonal abundance and host preference of Culicoides in Virginia: with emphasis on the ecology of Culicoides variipennis (Diptera: Ceratopogonidae)
Trap type, time and site influenced the species composition, number collected and female age. Thirty species were collected in the BLTs and 17 in the bait traps. Culicoides biguattatus, C. obsoletus, C. stellifer, C. varipennis, and C. venustus were the most abundant species collected in both …
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Searching for answers to the silent decline: first estimates of survival and recruitment for the critically endangered Rose's mountain toadlet, Capensibufo rosei
… and rainfall, specifically during the start of breeding, was negative, with breeding season rainfall explaining 94% of the variability in survival rate over time. I also found evidence to suggest that higher adult survival during poorer breeding rainfall years may be a natural population …
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Piping plover breeding biology and reproductive success on Assateague Island
… on Assateague Island during the 1986 and 1987 breeding seasons. In 1987, I estimated the population to be 69 pairs. During both years, plovers nested on only a few portions of the island. I think that this pattern of nesting was determined by the distribution of three types of foraging …
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Population Ecology and Foraging Behavior of Breeding Birds in Bottomland Hardwood Forests of the Lower Roanoke River
… near edges. I studied nest survival of breeding birds in bottomland hardwood forests of the lower Roanoke River, North Carolina. Nesting success was monitored in two forest width classes: narrow bands of levee forest that were dominated by two edge types, and wide, continuous levee …
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The variable contribution of larval habitats on the production of mosquitoes that transmit West Nile Virus: a landscape epidemiology approach
… of catch basin and natural standing water larval sites, weekly mosquito collections of larval and adult mosquitoes during an 18-week period, a more limited assessment of larval sites associated with containers near homes, and lawn watering activities. The analyses undertaken revealed that urban …
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The effect of environmental and social factors on the courtship and mating dynamics of the smooth newt, Triturus v. vulgaris
… for a brief period after arrival at the breeding site (early spring), subsequently re-mating only sporadically. Therefore, few courtships take place at mid-season, optimal temperatures. In the semi-natural population. deposition occurred in only 3 - 6% of courtships with a median of one …
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Habitat Selection by Yellow -Headed Blackbirds
Migratory birds have the ability to select a breeding site from a large number of sites across a large geographic area. Therefore, one might expect that migratory birds would select the site where they would realize the greatest fitness. However, little is known about how and why migratory birds …
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Predicting Amphibian Occurrence Based on Wetland and Landscape Level Factors in Montana
… that requires a mosaic of habitats, including breeding, foraging, and over-wintering areas. Historically, regulators have focused on wetland breeding habitat quality to explain amphibian presence. Recently, other habitat requirements including landscape level factors have been examined. Data …
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Predicting Amphibian Occurrence Based on Wetland and Landscape Level Factors in Montana
… that requires a mosaic of habitats, including breeding, foraging, and over-wintering areas. Historically, regulators have focused on wetland breeding habitat quality to explain amphibian presence. Recently, other habitat requirements including landscape level factors have been examined. Data …
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Demography and Behavior of Western Sandpipers (Calidris mauri) Breeding on the Yukon-Kuskokwim River Delta, Alaska
… studies of Western Sandpipers (Calidris mauri) breeding on the Yukon-Kuskokwim River Delta, Alaska (1998-2005). In chapter one, I estimated apparent annual survival (product of true survival and site fidelity) while correcting for the probability of encounter for 237 males and 296 females. …
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The Conservation Ecology of Rana temporaria and Bufo bufo in Leicestershire
… cover have decreased within the previous decade. Breeding pond surveys revealed Rana temporaria to breed in areas with no rough vegetation in field ponds as small as 35 m3, but Bufo bufo only in ponds over 100 m3, in areas where scrub vegetation cover exceeded 2.5% of the total area. The densities …
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Ecosystem engineering: beaver and the population structure of Columbia spotted frogs in western Montana
… to compare the scale and pattern of lentic sites, their occupancy, and population structure by Columbia spotted frogs (Rana luteiventris) between watersheds with and without beaver activity. Across all watersheds frog breeding sites were more clustered than the underlying pattern of lentic …
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Ecosystem engineering: beaver and the population structure of Columbia spotted frogs in western Montana
… to compare the scale and pattern of lentic sites, their occupancy, and population structure by Columbia spotted frogs (Rana luteiventris) between watersheds with and without beaver activity. Across all watersheds frog breeding sites were more clustered than the underlying pattern of lentic …
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The breeding ecology and behavioural adaptations of African black oystercatchers in light of climate change
… adaptations used by the species to cope with breeding in a limited strip of beach, between high tides and terrestrial predators, and with little nesting shelter, and their breeding decisions to maximise breeding outcomes. Behavioural and breeding data were collected over three breeding seasons …
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Response of Australian Boobooks (Ninox boobook) to threatening processes across urban, agricultural, and woodland ecosystems
… and impacts on spatial genetic structure; breeding site availability; and infection by the parasite Toxoplasma gondii. I also conducted a literature review on the use and regulation of ARs in Australia and published accounts of non-target impacts in order to contextualise exposure patterns …
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Burrowing Owl Distribution and Nest Site Selection in Western South Dakota
… utilized by burrowing owls in the selection of a breeding site. To examine factors driving nest site selection at multiple spatial scales, I searched for owls in 107 prairie dog colonies from May through August 2011. I located nest burrows in owl-occupied colonies, and I randomly selected non-nest …
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Epidemiological Landscapes: The Spaces and Politics of Mosquito Control in Lahore
… narratives of progress or as naturalised sites of pathogenic rupture. The empirical research for this dissertation is based on the accounts of people — scientists, entomologists, and public health workers — whose own practices are informed by the habits and habitats of mosquitoes. …
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