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 20 of 44 for “"population viability"”.
-
Population Viability Analysis of Swift fox (Vulpes velox) at the Badlands National Park
… non-target poisoning, and harvest. A remnant population occurred on USDA Forest Service lands in Fall River County, South Dakota. Following the successful reintroduction of the species in Canada (1983), a reintroduction program was initiated in BNP in the year 2003. Free-ranging swift fox from …
-
Effects of habitat degradation on the evolutionary dynamics of populations in a rainforest cycad (Gymnospermae)
… have important consequences for biodiversity and population persistence, including effects on ecological and genetic processes beyond decreased demographic viability and the loss of genetic variation. Particularly interesting is the potential for evolutionary changes and adaptation to degraded …
-
Population dynamics of the Columbia spotted frog (Rana luteiventris): inference from long-term demography
… of climate conditions may affect amphibian populations in complex, unpredictable ways. However, few studies have evaluated effects of climate change on individual vital rates and subsequent population dynamics of amphibians. I investigated the population dynamics of a high elevation …
-
Population dynamics of the Columbia spotted frog (Rana luteiventris): inference from long-term demography
… of climate conditions may affect amphibian populations in complex, unpredictable ways. However, few studies have evaluated effects of climate change on individual vital rates and subsequent population dynamics of amphibians. I investigated the population dynamics of a high elevation …
-
An Interdisciplinary Examination and Assessment of Current Conservation Initiatives for Javan Gibbons (Hylobates moloch)
… simulation program, VORTEX, to create an updated Population Viability Analysis illustrating the long-term population viability of Javan gibbons with regards to current threats they face in the wild (habitat loss and the illegal pet trade); I investigated the illegal selling of gibbons through an …
-
Life and death in a corn desert oasis: reproduction, mortality, genetic diversity, and viability of Illinois' last Eastern Massasauga population
… species are forced into small often fragmented populations at increased risk of extirpation. Reptile species are thought to be experiencing wide-spread declines, the extent of which may be underestimated due to lack of long-term data for most species. Snakes, especially venomous species, are …
-
Genetic Structure and Demographic Analysis of Key deer (Odocoileus virginianus clavium)
… study), homogeneous, and have a female-biased population of approximately 900 deer. I used 985bp of the mitochondrial cytochrome b gene and 12 microsatellite loci to test two hypotheses: 1) if the Moser Channel is a barrier to gene flow, I should expect that Key deer are differentiated and have …
-
Changes in nesting numbers and breeding success of African White-backed Vultures in northern Botswana
… yet there is no published information on their population trends or their breeding success in this country. However, in recent years within Botswana and neighbouring countries there have been multiple incidents of mass poisonings, which have resulted in the deaths of thousands of White-backed …
-
Female Dispersal and Inbreeding in the Red-cockaded Woodpecker
… determines gene flow and has profound effects on population structure, demography, social systems, and population viability. To add to our knowledge of dispersal and, in particular, our understanding of the relationship between dispersal and inbreeding, I studied three aspects of the biology of …
-
Biological control studies of Phytophthora Parasitica root rot of boxwood using multiple antagonists
… bacteria, five fungi and three actinomycetes. Populations of conidia-forming fungal isolates increased or remained fairly stable when stored in 0.25% suspensions of CMC and MC, indicating that spores may be a more suitable propagule than mycelial fragments when storing fungal isolates for more …
-
Temporal Change in Community Composition, Ecological Niche, and Phenotypic Selection in Minnesota’s Rare Arctic Relict Plants
Rare, arctic relict plant populations of Minnesota, found in the cool and moist microclimate produced along the cold waters of Lake Superior, face an uncertain future due to anthropogenic climate change. In this study, we used a variety of approaches to examine the contemporary impacts of climate …
-
Demografía y ecología evolutiva del subarbusto carnívoro Drosophyllum lusitanicum (L.) Link. (Drosophyllaceae)
… posing potentially significant threats to the viability of disturbance-adapted species and therefore causing biodiviersity loss. With fires regularly affecting 50 % of the Eath’s surface, such compounded effects of disturbance interactions are particularly prominent in fire-prone ecosystems. …
-
Birth, death and taxis: North Atlantic right whales in the twenty-first century
… Tag-recapture models of extremely small populations are vulnerable to such heterogeneity, since animals missing for extended periods can create spurious estimates of survivorship, growth rates, and population viability.</p><p>An analysis of satellite-tracked movements of two adult female …
-
Escaping the extinction vortex: identifying factors affecting population performance and recovery in endangered Sierra Nevada bighorn sheep
… quality, to reinforce the demise of a small population. To successfully escape an extinction vortex and enable species recovery, all processes that affect endangered populations should be comprehensively assessed and incorporated into conservation plans. For my dissertation, I worked in …
-
Escaping the extinction vortex: identifying factors affecting population performance and recovery in endangered Sierra Nevada bighorn sheep
… quality, to reinforce the demise of a small population. To successfully escape an extinction vortex and enable species recovery, all processes that affect endangered populations should be comprehensively assessed and incorporated into conservation plans. For my dissertation, I worked in …
-
The population dynamics and conservation of the African Black Oystercatcher, Haematopus moquini
… Near-threatened by virtue of the fact that the population size is small «10 000) and numbers have decreased or were previously recorded as decreasing. Aspects considered to be of conservation concern to the species are (a) its inherently low and variable breeding success; (b) its ground-nesting …
-
Predicting Northern Goshawk Dynamics Using an Individual-based Spatial Model
… Black Hills National Forest to manage for its viability. Previous studies have suggested that a model integrating goshawk population demographics, habitat availability, and territoriality would have the ability to predict population dynamics including goshawk locations, population size, and …
-
Predicting Northern Goshawk Dynamics Using an Individual-based Spatial Model
… Black Hills National Forest to manage for its viability. Previous studies have suggested that a model integrating goshawk population demographics, habitat availability, and territoriality would have the ability to predict population dynamics including goshawk locations, population size, and …
-
Investigating Multiple Modifier Network Candidates as Suppressors of zyg-1/PLK4 in C. elegans
… induced their own phenotype, reducing the population viability of these strains. Finally, this study explores the mechanism for suppression of zyg-1(it25) from the validated modifiers, most of which are components of the Anaphase Promoting Complex; all modifying variants show delays of the …
-
On the use of demographic models to inform amphibian conservation and management: A case study of the reticulated flatwoods salamander
… under the Endangered Species Act (ESA). Population viability analyses (PVAs) represent a key component of many recovery plans for threatened and endangered species. Here we use 10 years of mark recapture data collected from two breeding populations of A. bishopi to construct a demographic …
Page 1 of 3