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 11 of 11 for “"optimal habitat"”.
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Developing Habitat Suitability Criteria for Individual Species and Habitat Guilds in the Shenandoah River Basin
… An often-suggested approach has been to use habitat guilds to incorporate the diversity found in these systems. My goal is to determine the feasibility of developing habitat suitability criteria (HSC) for the entire fish assemblage in the North and South Fork Shenandoah River, Virginia, using …
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Identifying New Potential Breeding Pond Sites for the Dusky Gopher Frog in Southern Mississippi
… 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 habitat …
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Characterization of Suitable Habitats for Freshwater Mussels in the Clinch River, Virginia and Tennessee
… reaches. Before flows can be modified to create habitat for freshwater mussels, suitable microhabitat conditions must be defined. In this study, I used multiple approaches to define suitable microhabitats for species in the free-flowing upper Clinch River, Virginia and Tennessee, where …
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Use of GIS and Remote Sensing Technologies to Study Habitat Requirements of Ocelots, Leopardus pardalis, in south Texas
… technologies to gain a better understanding of habitat requirements of a population of ocelots in south Texas, and then apply this knowledge to form a predictive model to locate areas of suitable habitat in Willacy and Cameron counties, Texas. Satellite imagery from August 1991 and August 2000 …
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Habitat selection, food availability, and reproductive success of southwestern willow flycatchers on the South Fork Kern River, California
… in 2000. My goals were to examine E. t. extimus habitat selection on the South Fork Kern River, to determine how habitat characteristics and food availability affect E. t. extimus demographics, and to make inferences about possible reasons for the decline. My first objective was to determine …
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Fine-scale movements and habitat use of the Southern Ground Hornbill Bucorvus Leadbeateri
… patterns and how they interact with their habitat is useful to inform conservation and habitat management options for the species, to select sites for artificial nests and to identify suitable areas for reintroduction initiatives. In this study, I report daily and seasonal patterns of …
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Habitat Characteristics of Refuge Wetlands and Taro Lo'I Used By Endangered Waterbirds At Hanalei National Wildlife Refuge, Hawai'i
… Refuge (HNWR) was established to protect habitat for the endangered Hawaiian common moorhen (Gallinula chloropus sandvicensis), Hawaiian coot (Fulica alai), Hawaiian duck or Koloa (Anas wyvilliana), and Hawaiian stilt (Himantopus mexicanus knudseni). I studied two major habitat types …
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Cooperative breeding and delayed dispersal in the Pale chanting goshawk, Melierax canorus
… biomass) and Parotomys brantsii (18-32 % ). The habitat quality of Karroid Broken Veld for Pale Chanting Goshawks was high since, compared with other vegetation types, it incorporated: (1) optimal habitat for otomyinid prey, (2) a very high estimated biomass of otomyinids, almost twice that of …
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The return of a large Carnivore: Recovery of the Cantabrian brown Bear and the Challenge of Coexistence in a human-dominated Landscape
… species. This direct persecution, coupled with habitat loss and fragmentation, has brought many of their populations to the brink of extinction. The rise of social, political and scientific movements during the 20th century in favour of conservation prompted the creation of legal protection …
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Life History Divergence & Tidal Salt Marsh Adaptations of the Coastal Plain Swamp Sparrow
… causes of speciation. To understand how specific habitats shape local adaptation, it is helpful to study closely-related populations from widely differing ecosystems that have not had sufficient time to diverge by genetic drift. Throughout the following chapters I examine the distribution of …
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Conservation ecology of the Cape clawless otter, Aonyx capensis, in an urban environment
… and marine ecosystems - primarily through habitat loss, fragmentation and pollution. Globally, it has been found that otter's dependence on these ecosystems exposes them to a myriad of threats, including loss of habitat, human-wildlife conflict and the bioaccumulation of toxic pollutants. …