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 41 for “"source populations"”.
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Effects of Culverts on Brook Trout Genetic Diversity
… not found to have losses in genetic diversity, populations above culverts with a high outlet drop were found to have significant population differentiation when compared to streams with passable culverts and streams without culverts. Additionally, restoration of an impassable road culvert on a …
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Genetic factors affecting establishment during invasions : the introduction of the topmouth gudgeon (Pseudorasbora parva) and the rainbow trout (Oncorhynchus mykiss) in Europe
… to study evolutionary responses of non-native populations to their new environment, and the factors influencing invasions. Introduced species often evolve rapidly, despite the assumed loss of genetic variation associated with bottlenecks during the invasion process. In order examine the …
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The ecology of translocated greater sage-grouse in Strawberry Valley, Utah
… transported 137 adult female sage-grouse from 2 source populations to a release site in Strawberry Valley, Utah during March-April 2003-2005. The resident population of sage-grouse in Strawberry Valley was approximately 150 breeding birds prior to the release. We radiomarked each female and …
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Impact of a Historical Translocation on Populations of White-Tailed Deer Odocoileus virginianus
… impact of a historical translocation event on populations of white-tailed deer in Georgia. The technique may also serve as a model by which management practices for other rare species can be studied. Populations from an original translocation source in Wisconsin, another Wisconsin population, …
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Population genetics of the cichlid, Cynotilapia afra (Günther 1894), in its native and introduced ranges in Lake Malawi
… to Malawian people, and they form an important source (circa 70%) of animal protein in their diet. Furthermore, fisheries activity employs 3% of the country's population and contributes to 4% of the country's Gross Domestic Product (GDP).This thesis studies a well documented, human mediated …
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Ecological implications of introducing Leucaspius delineatus (Heckel, 1843) and Pseudorasbora parva (Temminck and Schlegel, 1842) into inland waters in England
… sunbleak and topmouth gudgeon were assessed for source populations to determine dispersal potential. Potential risks for native species posed by these two alien cyprinids were assessed with respect to the parasite fauna and overlaps in resource use. For sunbleak, these were also examined in terms …
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Evolutionary Genomics of the Trans-Atlantic Slave Trade
… from West Africa (dominantly from Nigerian populations). Gene flow patterns were observed among former African slaves, their European slave masters, and Native American populations, resulting in genetic diversity among modern-day African Americans that is greater than any other population …
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An Evaluation of the Survival and Growth of Juvenile and Adult Freshwater Mussels at the Aquatic Wildlife Conservation Center (AWCC), Marion, Virginia
The decline of many freshwater mussel populations in the United States has brought about the need for facilities in which mussels can be held for purposes of relocation, research, and propagation. The Aquatic Wildlife Conservation Center (AWCC) of the Virginia Department of Game and Inland …
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SEED BANK DYNAMICS WITHIN A METAPOPULATION FRAMEWORK: A STUDY OF AN ANT-DISPERSED SPECIES
… has some dependence on distance from source populations and primary disperser activity, but the presence of seeds within the greater forest matrix also indicated reliance on landscape, physiographic, or disturbance-related factors. Seed distribution has the potential to influence …
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Luminosity functions consistent with a pulsar-dominated Galactic Center Excess
… in the literature, and compare the predicted populations of resolved point sources to the Fermi 4FGL-DR2 point source catalog and a sub-population recently identified using wavelet-based methods. We provide general results that can be used to translate upper limits on the number of resolved …
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Reproductive traits of pioneer gastropod species colonizing deep-sea hydrothermal vents after an eruption
… of the estimated eruption date, individuals in populations of both C. porifera and L. tevnianus were reproductively mature. The smallest reproducing C. porifera were 4.2 mm (males) and 5.4 mm (females) in shell length, whereas reproductive L. tevnianus were smaller (2.3 and 2.4 mm in males and …
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Conserving temperate montane birds under climate change: an assessment of potential management options
… as well as for identifying the most suitable source populations for translocating individuals to those sites, the latter of which represents a novel approach.
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TRACKING PLANT VIRUS INFECTIONS THROUGH MULTIPLE DIMENSIONS: A SEARCH FOR SOURCES OF NONPERSISTENT VIRUS VECTORS AND RESERVOIRS AT LOCAL AND REGIONAL SCALES
… in particular, it focuses on identifying source populations of vectors and virus reservoirs within fields and interactions of vector aphids with land cover surrounding and within fields. Initially, I identified the most commonly occurring viruses and aphid species associated with virus …
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Range-wide Distribution and Genetic Structure of Acroneuria frisoni Stark and Brown, 1991 (Plecoptera; Perlidae): Tools for Reintroduction to Central Illinois
… genetic structure; 3) Selection of candidate sources from among regional populations and 4) The reintroduction of A. frisoni to the Middle Fork of the Vermilion River, Vermilion County Illinois; and 5) Evaluation of reintroduction success. The mitochondrial gene Cytochrome Oxidase I (COI) was …
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Reproductive traits of pioneer gastropod species colonizing deep-see hydrothermal vents after an eruption
… of the estimated eruption date, individuals in populations of both C. porfera and L. tevnianus were reproductively mature. The smallest reproducing C. porifera were 4.2 mm (males) and 5.4 mm (females) in shell length, whereas reproductive L. tevnianus were smaller (2.3 and 2.4 mm in males and …
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Ecology and Structure of Black Bear (Ursus americanus) Populations in the Interior Highlands of Arkansas
… There was evidence for female philopatry in both source and expanding populations, with relatedness declining with distance until about 30 km. In recently expanding populations, male-male dyads followed a similar pattern to female-female dyads with relatedness decreasing with distance. …
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Detectability, movement, and population structure of the endangered Candy Darter in Virginia
… ranges, which often results in isolated populations. The Candy Darter Etheostoma osburni was recently listed as Endangered and may represent a suite of other imperiled fishes in terms of their ecology, life-history traits, and conservation needs. I examined the effects of microhabitat …
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Causes and Implications of Fox Population Dynamics in Central Southern England
… many other European countries. However, owing to source-sink dynamics, numerous studies have demonstrated that individuals removed by lethal methods can be replaced rapidly through compensatory immigration. Therefore, given that culling is not a long-term solution, identifying the underlying …
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A Molecular Anthropological Study of Altaian Histories Utilizing Population Genetics and Phylogeography
… explores the genetic histories of several populations living in the Altai Republic of Russia. It employs an approach combining methods from population genetics and phylogeography to characterize genetic diversity in these populations, and places the results in a molecular anthropological …
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The Molecular Systematics of the Side-blotched Lizards (IGUANIA: PHRYNOSOMATIDAE: UTA)
… of California and Pacific Ocean and 48 adjacent populations from Baja California Sur, Baja California, California, New Mexico, and Sonora. All currently recognized species are represented. Both maximum parsimony and maximum likelihood were used to reconstruct phylogenetic relationships. This …
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