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 15 of 15 for “"modern populations"”.
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Time-Averaging and Morphology: Variability in Modern Populations and Fossil Assemblages of Mercenaria (Bivalvia)
… was compared between 6 standing crop, living populations of Mercenaria campechiensis (Bivalvia) and two fossil assemblages of M. campechiensis and M. permagna. One fossil sample was collected as a series of superposed units that could be analyzed individually or in aggregate. The x,y …
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Mitochondrial DNA in ancient human populations of Europe.
… DNA has been studied in a wide array of modern populations in order to reconstruct the migrations that have participated in the spread of our ancestors on the planet. However, population genetic processes (e.g., replacement, genetic drift) can significantly bias the reconstruction and …
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Stress Along the Medieval Anglo-Scottish Border? Skeletal Indicators of Conflict-Zone Health
Health changes experienced by populations living in regions of conflict have come to the forefront of research in light of recent increases in socio-political instability in modern populations. Political and ethnic unrest in modern populations have been shown to instigate a decline in the health of …
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Human mitochondrial DNA and population structure of the Western Mediterranean Islands
… through a comparative analysis of ancient and modern mitochondrial DNA (mtDNA). By integrating high-resolution mitogenomic data, the study aims to explore how migration, colonization processes, and long-term geographic isolation have shaped the genetic structure of insular populations over …
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Population Structure Based on Age-Class Distribution of <em>Tapirus polkensis</em> from the Gray Fossil Site Tennessee.
… polkensis</em> sample is remarkably similar to modern populations of <em>Diceros bicornis</em>.</p>
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AN ASSESSMENT OF SUBADULT SKELETAL GROWTH AND DEVELOPMENT BASED ON A MICHIGAN MEDICAL EXAMINER SAMPLE
… bone measurements are not based on data from modern populations, it is important to validate them. This study involved the evaluation of the length and weight measurements (collected at autopsy from decedents whose deaths were investigated by one Michigan MEO), and upper arm measurements …
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The Distribution of Neanderthal Ancestry Across Populations And Within Genomes
For many millennia, modern humans overlapped in time and space with archaic humans such as Neanderthals and Denisovans. We now know that modern and archaic humans interbred, and that modern human populations carry some amount of archaic ancestry. The complexities of this admixture history, however, …
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Dietary ecology of mixed-feeding antelopes in the Omo-Turkana basin during the Plio-Pleistocene: a tool to investigate hominin palaeo-environments.
… between land cover and dietary behaviours of modern populations. The high variability of stable carbon isotope values observed across modern impala specimens and the wide range of habitat types they were associated with showed that impalas tend to rely heavily on palatable grasses and forbs, …
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Mitochondrial DNA analysis of the evolution and genetic diversity of ancient and extinct bears.
Mitochondrial phylogeographic analyses of modern populations can be used to make inferences about the impacts of the last glacial maximum (LGM) and anthropogenic disruption on late Pleistocene and Holocene ancestral populations. However, it is becoming more and more evident that ancient DNA studies …
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Painting the Past: Uncovering Ancestral Contributions to Complex Human Phenotypes in Western Eurasia
… load within and phenotypic differences between modern human populations remain poorly understood. Understanding these phenomena would lead to a better understanding of the origins of complex phenotypes, including genetically-influenced diseases, and their geographic distributions. The aim of …
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Diet Assessment in Tropical African Populations - the implications of detecting biological signals in current diets to the study of past diets
… one is often interested in the diets of past populations. To assess human diet in the past, stable isotope ratio and dental microwear analyses are often perceived as the only semi-quantitative and objective techniques. However, there are still many unknowns on how isotopic and microwear …
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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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Challenges in Reconstructing Past Exploitations of Atlantic Cod: A Zooarchaeological Case Study from Early Medieval England
… and pelagic fishing of larger bodied, healthier populations in England from the 8th cent.CE, pushing back the assumed rise in marine fishing commonly referred to as the ‘Fish Event Horizon’, or the FEH, by 300 years. The findings are an important contribution to assessing past human impacts on …
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Population genetic history of the British roe deer (Capreolus capreolus) and its implications for diversity and fitness
… It was unknown which group British roe deer populations belonged. Using a 419 bp region of the mt-DNA d-loop (HVR1) amplified from ancient and modern UK samples a direct comparison was made with previously published European data. Results showed that UK populations belong to the central …
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Population trends and ecological community interactions of freshwater mussels
… three broad questions. First, I ask how mussel populations are changing over time and in response to anthropogenic ecosystem alteration, addressed in Chapters 2 and 3. Secondly, I investigate the ways freshwater mussels affect wider freshwater communities, discussed in Chapters 4-6. Finally, in …