Sökning: "demography"

Visar resultat 16 - 20 av 171 avhandlingar innehållade ordet demography.

1. 16. Inferring Evolutionary Processes of Humans

   Författare :Sen Li; Mattias Jakobsson; Ludovic Orlando; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Approximate Bayesian Computation; TMRCA; demography; human evolution; Bantu-Expansion; Out-of-Africa;

   Sammanfattning : More and more human genomic data has become available in recent years by the improvement of DNA sequencing technologies. These data provide abundant genetic variation information which is an important resource to help us to understand the evolutionary history of humans. LÄS MER

3. 17. Demography and Polyploidy in Capsella

   Författare :Kate St.Onge; Anna Palmé; Martin Lascoux; Ulf Lagercrantz; Richard Abbott; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Approximate Bayesian Computation; Mating system; Brassicaceae; flowering time; genetic diversity; Evolution; Biology; Biologi;

   Sammanfattning : Studies of demography and population structure give insight into important evolutionary processes such as speciation and diversification. In the present work I perform such studies in the genus Capsella, which has three species: C. grandiflora, an outcrossing diploid, C. rubella a selfing diploid, and C. LÄS MER

4. 18. Socially stable alcoholics: What characterises them? Drinking patterns, personality and health aspects of psychosocial and clinical importance

   Författare :Kristina Berglund; Göteborgs universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; age; alcoholics; clinical characteristics; social stability; demography; gender; health functioning; personality; serotonin; substance use;

   Sammanfattning : People who misuse alcohol are a heterogeneous group with different etiology, social and clinical characteristics. This thesis includes four studies whose aim was to characterise so called socially stable alcoholics (i.e. individuals with preserved psychosocial functioning) regarding personality, physical and mental health and drinking patterns. LÄS MER

5. 19. Investigating the impacts of Late Pleistocene climate change on Arctic mammals using palaeogenomics

   Författare :Edana Lord; Love Dalén; Mirte Bosse; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; palaeogenomics; Arctic; Late Pleistocene; past climate; collared lemming; woolly rhinoceros; Norwegian lemming; muskox; demography; population structure; speciation; adaptation; genome erosion; Systematic Zoology; zoologisk systematik och evolutionsforskning;

   Sammanfattning : The climatic fluctuations of the Late Pleistocene likely had a large impact on the evolutionary history of Arctic species. Palaeogenomics is a useful tool to shed light on how past populations responded to these climatic shifts and the associated ice sheet dynamics and sea level change. LÄS MER

7. 20. Population ecology and management of waders breeding on coastal meadows

   Författare :Richard Ottvall; Biodiversitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal ecology; Djurekologi; grazing management; population modelling; demography; genetic structure; population decline; Tringa totanus;

   Sammanfattning : Many wader (Charadrii) populations are declining throughout in Europe, but the underlying causes are often poorly known and diverse. To fully grasp the reasons behind declines in vulnerable wader populations, it is crucial to understand the demography. LÄS MER