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 53 for “"breeding habitat"”.
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Comparison of grassland bird stopover and breeding habitat use in Illinois
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Investigating impacts of environmental biotic and abiotic factors on the breeding habitat and diet of declining grassland birds
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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The Role of Breeding Habitat Loss in the Decline of Eastern Whip-Poor-Will (Antrostomus Vociferus) Populations in Canada
… populations have declined across their breeding range since at least the late 1960s, and breeding habitat loss is thought to be a primary cause. Here we test this hypothesis using data from the North American Breeding Bird Survey — the same data that were used to document long-term …
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Influences of social and habitat features on selection and use of breeding habitat and pup survival in South American fur seals
… information is lacking about how fur seals use habitat and how this use influences fitness. Such information is important for understanding the prospects for recovery of declining populations like those of South American fur seals (Arctocephalus australis) in Peru. In this study I examined the …
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Hermit Thrush (<em>Catharus guttatus</em>) and Veery (<em>C. fuscescens</em>) Breeding Habitat Associations in Southern Appalachian High-Elevation Forests.
<p>The Hermit Thrush is a new breeding bird in the Southern Appalachian high-elevation mountains, having expanded its range southward over the last few decades. Here it is sympatric with the Veery, a congeneric breeding resident. In order to more fully understand why the range expansion took place …
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Assessing Black-capped Vireo (Vireo atricapillus) Breeding Habitat based on Size, Spatial Distribution, and Plant Species in Shrub Mottes at Kerr Wildlife Management Area, Texas
… ranging from a maturing scrubland to more open habitats. An important factor of BCV habitat is heterogeneity. BCVs inhabit areas with greater heterogeneity in vegetative cover. Vegetative cover in BCV habitat is composed of low deciduous shrubs with lateral branching to the ground. Openness, or …
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An ecosystem-based management approach for maintaining sandhill crane nesting habitat on northern Vancouver Island
… on northern Vancouver Island for their breeding habitat. With wind energy development being proposed for the area, an ecosystem-based management approach is being used to maintain Sandhill Crane breeding habitat and biological diversity within the bog wetland complex of the Nahwitti …
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Ecology Of Non-Breeding And Breeding Crested Caracaras (Caracara cheriway) In Florida
… "caracara") is likely declining due to loss of breeding habitat. Consequently, management-oriented restrictions on landscape modification are applied where breeding occurs, but management rarely is extended beyond breeding areas. Focusing management on breeding areas can be effective if all …
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Identifying New Potential Breeding Pond Sites for the Dusky Gopher Frog in Southern Mississippi
… frog (DGF). Ephemeral ponds are the preferred breeding habitat for the species, but they are quite rare in the region due to the diminishment of the longleaf pine ecosystem. This research addresses gaps in the current literature by providing a broad overview of dusky gopher frog breeding …
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Effects of Land Use on Avifauna in the Lake Thompson Watershed, South Dakota
… in the Lake Thompson Watershed (L TW) to assess breeding bird abundance and evaluate the effects of land use on their distribution. Waterfowl were surveyed first, then all breeding birds, then ring-necked pheasant (Phasianus colchicus) broods. In order to determine the effects of surrounding land …
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Grassland and breeding bird use of moist-soil wetlands managed for waterfowl
Many species of breeding birds are declining in the United States, and grassland birds are among those experiencing the steepest declines. One of the most widely accepted reasons for decreasing populations is habitat loss. For grassland birds in the midwestern United States during the spring and …
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Testing proximate causes and ultimate explanations of social cue use for habitat selection by songbirds
For many animals, breeding habitat selection is important because of its direct effects on fitness. There is growing evidence that songbirds select habitat using social cues emitted from individuals present in the habitat. Using the Yellow Warbler (Setophaga petechia), I designed multiple playback …
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Breeding and Nesting Behavior and Habitat of the Red-billed Pigeon (Columbia flavirostris) along the Rio Grande River in Texas
… The main cause for decline in Texas is probably habitat loss due to agricultural and urban expansion. Whil~ once common throughout the lower Rio Grande River Valley, it is now restricted to a short section of the Rio Grande River immediately below Falcon Dam where mature riparian vegetation still …
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POPULATION DYNAMICS OF SPECIES RECOVERY: MULTISCALE DEMOGRAPHY IN RESTORED HABITATS
With habitat loss remaining one of the greatest global threats to biodiversity, habitat restoration has become an important tool for species recovery and conservation. Yet despite the conceptually-appealing lens of “if you build it, they will come” (i.e., the ‘Field of Dreams’ Hypothesis), …
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The relationship between two species of fur seals Arctocephalus Tropicalis (Gray) and A. Gazella (Peters) on Marion Island
… Although the seasonal haul-out patterns and breeding habitat preferences of these two species do differ, these differences do not appear to be sufficient to prevent hybridization. Differences 1n suckling periods and pup growth rates may be acting to limit hybridization through pup mortality …
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Reproductive ecology of the island scrub-jay (Aphelocoma insularis)
… annual fecundity per pair, and documented breeding behavior. Nest predation was the major factor influencing nest success, accounting for 92 percent of documented nest failures. Nests that were initiated earlier in the breeding season, nests that were higher and more concealed, and nests of …
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Habitat Area Requirements of Prairie Wetland Birds in Eastern South Dakota
… ha) was studied to evaluate vegetative needs and habitat area requirements of 20 breeding wetland bird species in eastern South Dakota in 1995-1996. Vegetative preferences of species varied, but most waterfowl and nongame species occur e4i more frequently in wetlands with intermediate …
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Resource selection, movement patterns, and survival of post-fledging grassland birds in Missouri
… indicate that our working concepts of suitable breeding habitat need to be modified to accommodate post-fledging requirements and maximize the effectiveness of conservation strategies.
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Habitat selection in restored grasslands: the role of social cues in the settlement of Grasshopper Sparrows
… are used by many species to locate and select breeding sites. The role of social information in attracting birds to newly restored habitats is management relevant, but largely unexplored. I investigated the effect of social cues in the settlement behavior of Grasshopper Sparrows (Ammodramus …
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Projected sea level rise and the conservation ecology of the Micronesian Megapode (Megapodius laperouse senex) in Palau, Micronesia
… the avian family Megapodiidae. I also assessed habitat use, susceptibility to sea level rise, and the effect of introduced rats and tourist presence, as added stressors to climate change, on the Micronesian Megapode (Megapodius laperouse senex) in Palau. Based on available literature, I employed …
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