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Showing 1 to 20 of 69 for “"population genetic structure"”.
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An Assessment of Population Genetic Structure in Guillemots (Cepphus)
Understanding how evolutionary forces shape population genetic structure is a principal goal of evolutionary geneticists. Guillemots (Aves: Charadriiformes: Alcidae: Cepphus) provide useful systems for investigating population genetic differentiation in a genus with a wide geographic range that …
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Population Genetic Structure of Unionid Mussels Across Multiple Gulf Drainages
Understanding patterns of genetic differentiation within and across wildlife populations is a key component to parsing the demographic and ecological processes that govern the spatial structure and evolutionary trends of a given species. As molecular and computational techniques continue to …
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Population genetic structure of Antarctic springtails (Collembola) and New Zealand damselflies (Odonata)
… ability to analyze differences in the molecular structure of enzymes and DNA sequences has provided an extremely sensitive tool for investigating gene flow within and among populations, a key facet of the genetic divergence required for speciation to occur. Using such techniques, we are now able …
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Biology and peculiarities of the population-genetic structure of Lithuanian Cephalaspidomorphs (Cephalaspidomorphi) /
… distribution, abundance and status of lamprey populations in Lithuania is poor. The present thesis reviews the distribution and abundance of Lampetra fluviatilis (Linnaeus, 1758) and Lampetra planeri (Bloch, 1784) in Lithuanian rivers, as well as the factors that affect dispersion and abundance …
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Population Genetic Structure of the Temperate Scleractinian Coral, Oculina Arbuscula, in Coastal Georgia
… recruitment. In this study, I hypothesized that populations of the temperate coral, Oculina arbuscula, are maintained primarily by local recruitment off the Georgia coast because: 1) suitable substrate for settlement is patchy and 2) O. arbuscula's branching morphology is conducive to asexual …
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Population Genetic Structure of Ixodes pacificus Ticks and Detection of Their Pathogens In-Silico
… new environment by ticks can be modeled using genetic information and can be used to inform public health agencies of the risk of encountering ticks. Using Restriction-site DNA sequencing (RAD-seq) (Chapter 2), tick migration, phylogenetic relationships, population structure, clustering …
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Population Genetic Structure of the Introduced North American Population of the Hornet, Vespa Crabro Germana Christ
… that the probable source for the North American population was Germany. The data also suggested that the founding group was small; there was but a single mitochondrial haplotype represented for North America at the three loci investigated (COI, COII and Cytochrome-B). Microsatellite data …
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Population genetic structure of a planktonic diatom in the Gulf of naples : <i>Pseudo-nitzschia multistriata</i>
… 2004 also in summer. This thesis focuses on population genetic structure of the species using the Internal Transcribed Spacers in the rDNA as well as seven polymorphic microsatellites.<br></br><br></br>Cells isolated from plankton samples taken in 2008 and 2009 were grown into strains from …
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Impact of self-fertilization on fecundity, the timing of first reproduction, and population genetic structure: Is a mate worth the wait?
… avoidance. The selfing rate of natural populations was evaluated using species-specific microsatellites and is consistent with preferential selfing (mean: 0.801), though some outcrossing appears to take place. Population genetic structure indicates populations are disjunct and …
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Environmental and landscape determinants of population genetic structure and diversity of the great fruit-eating bat, Artibeus lituratus, in Atlantic forest remnants in South America
… diversification of taxa through space and time. Genetic variation can provide insight into mechanisms governing the distribution and structure of natural populations, and population responses to environmental change, which in turn can have important consequences for the maintenance of species …
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Population genetics prior to biological control: Ceutorhynchus weevils proposed for managing garlic mustard
I studied the population genetic structure of three weevil species, Ceutorhynchus alliariae, C. roberti, and C. scrobicollis, being considered for the biological control of garlic mustard, Alliaria petiolata, in North America. My first objective was to develop a polymerase chain …
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The genetic structure of New Zealand's coastal benthos: using the estuarine clam Austrovenus stutchburyi, to determine rates of gene flow and population connectivity
… process that benthic taxa can found new populations, colonise disturbed or degraded habitats and achieve genetic exchange between geographically separated subpopulations. While it is widely accepted that the dispersal process is important in determining the dynamics of many marine …
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Population Genetics of Sabatia Campestris (Gentianaceae), a State-Endangered Plant of the Illinois Prairie
Population genetic structure of peripheral populations of S. campestris from Illinois was investigated both within Illinois and at a regional scale. The results identified isolation by distance patterns indicating that Illinois populations differed genetically from central populations that were …
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Habitat modification and gene flow in Saimiri oerstedii: Landscape genetics, intraspecific molecular systematics, and conservation
Habitat modification, when it results in population fragmentation, often results in the loss of genetic diversity due to reduced gene flow, inbreeding, and genetic drift. However, the severity of these effects depends on how diminished dispersal and gene flow become between patches of suitable …
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Comparative Phylogeography of Central African Duikers Using Non-invasive Sampling Methods
… samples. Third, for fine scale analyses of population genetic structure, a set of twelve nuclear microsatellites were assembled from existing bovid data. These microsatellites markers were chosen because they are very polymorphic, cross amplify among targeted taxa, co-amplify with combined …
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Ecological and Genetic Connectivity of Shrews (Sorex spp.) across Interstate-90 in the Washington Cascade Range
… Transportation is constructing wildlife crossing structures to increase ecosystem connectivity as part of this project. The goal of my study was to investigate shrews – very small mammals with presumably low mobility and dispersal capacity – at sites on the eastern slopes of the Cascade Range …
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A genetic perspective on leopard (Panthera pardus) conservation units across southern Africa
… should ideally synthesise a wide array of data – genetic, ecological, demographic – to identify the appropriate scales at which conservation actions can then be directed. Despite being the most widespread of all felids in Africa, and facing numerous threats across its range, it has been proposed …
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Genetic analysis reveals bidirectional fish movement across the Continental Divide via an interbasin water transfer
… single nucleotide polymorphisms to characterize population genetic structure in cutthroat trout (Oncorhynchus clarkii) and determine if fish utilize the Grand Ditch as a movement corridor. Samples were collected from two sites on the west side and three sites on the east side of the Continental …
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Genetic Variability, Pathogen Susceptibility, Subspecies Identity and Conservation of the Endangered Northern Flying Squirrel (Glaucomys sabrinus) in Virginia
I examined the population genetic structure of three known subspecies of Glaucomys sabrinus from Appalachia, Washington State, and two previously unexamined populations from Mount Rogers National Recreation Area (MRNRA) in Southwestern Virginia. Mean FST (0.107) and an AMOVA (P G. sabrinus …
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