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 227 for “"population genetic"”.
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Population genetic and phylogeographic insights into the phyllosomal odyssey
The spatial and temporal scale of genetic connectivity influences ecological and evolutionary processes ranging from metapopulation dynamics to species diversification. The majority of marine species maintain genetic connectivity through pelagic propagules, and propagule duration is hypothesized to …
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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 frameworks and functional genomics of Mycobacterium bovis
… bovis. Approximately one-third of the world's population is infected with M. tuberculosis or M. bovis, "the world's most successful pathogen", the majority in developing countries. The global spread and increasing severity of tuberculosis are due in part to the high number of individuals …
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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 Annotation of the Human Genome: Identifying Pathogenic Mutations
… have been a series of breakthroughs in human genetics. The advent of next-generation sequencing (NGS) has made it possible, for the first time, to sequence an entire human genome inexpensively and efficiently. The affordability and ease of NGS has led to an explosion of data. Now, the largest …
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Population genetic relationships in the roseate tern: globally, regionally and locally
… subspecies. In this study, two kinds of genetic marker, ND2 and ND6 mitochondrial DNA sequences and microsatellite genotyping, were used to investigate the historical and contemporary relationships among roseate tern breeding colonies. I used samples from breeding colonies in Australia, …
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Population genetic structuring in the common mole-rat, Cryptomys hottentotus hottentotus
This thesis addresses the population genetic consequences of divergent social structure and dispersal regimes in two study populations of the common mole-rat Cryptomys hottentotus hottentotus. Aspects relating to the relationship between, gene flow and genetic variation, the roles of mutation and …
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Brook Trout Population Genetic Tools for Natural Barriers in Fragmented Subwatersheds
… my research was to investigate applications of population genetic analysis tools as indicators of barrier effects on brook trout populations in fragmented subwatersheds. In chapter1, I tested the hypothesis that brook trout population genetic differentiation (FST) above and below barriers will …
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Population genetic structure of Antarctic springtails (Collembola) and New Zealand damselflies (Odonata)
… 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 to gain a snapshot of the genetic structure of a population and its geographical distribution (Hewitt, 2001) In this way, the …
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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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The population genetic structure of coral reef fishes on the Great Barrier Reef
The population genetic structure of species may be determined by complex interactions among many ecological, evolutionary and genetic processes. I investigated the population genetic structure of coral reef fishes on the Great Barrier Reef (GBR), Australia to better understand how these various …
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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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Experimental and Population Genetic Evidence of Host Race Formation in a Specialized Lycaenid Butterfly
… whether adaptation to different hosts drives population genetic divergence in the juniper hairstreak butterfly, Mitoura gryneus. Mitoura exhibit host plant fidelity, in which males lek and mating occurs on host trees. Female oviposition preference for the natal host, and differential fitness …
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CHARACTERIZATION OF MICROSATELLITE LOCI AND PILOT POPULATION GENETIC ANALYSIS IN HICKORY SHAD, ALOSA MEDIOCRIS
… fish sub-family Alosinae. This study, the first population genetic analysis of this species, employed 12 neutral microsatellite loci to estimate genetic diversity and population structure in tributaries of lower Chesapeake Bay, Virginia including James River and its tributaries (Appomattox and …
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Differential avian extinction from Barro Colorado Island, Panama: Nest predation and population genetic factors
On Barro Colorado Island (BCI), a 1500 ha forest preserve in Gatun Lake (part of the Panama Canal) that has been isolated form mainland forest for 75 years, eight species of birds in the terrestrial insectivore guild have gone extinct, one is declining, and 3 persist. I evaluated two alternative …
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POPULATION GENETIC APPROACHES FOR THE STUDY OF COMPLEX TRAITS: FOCUS ON INFECTIOUS AND AUTOIMMUNE DISEASES
… represented one of the major threats to human populations and have therefore acted as a powerful selective force. Therefore, several human genes have evolved in response to infectious agents. Indeed, it has been suggested that human populations may have adapted to pathogens to such a degree …
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Population genetic analyses of Ferula gr. communis and Ruta gr. corsica in the Tyrrhenian area
… these species is still scarce, especially at the genetic level. In this thesis the first assessment is reported of the genetic diversity and structure of the Corso-Sardinian endemic Ferula arrigonii (Apiaceae) and of Ruta corsica and R. lamarmorae (Rutaceae), endemic to Corsica and Sardinia, …
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