Sökning: "isolation-by-distance"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet isolation-by-distance.

  1. 1. MHC and genomic diversity in Atlantic salmon (Salmo salar L.)

    Författare :Jakob Lohm; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Djurekologi; cytogenetik; Genetik; cytogenetics; Genetics; nucleotide diversity; isolation-by-distance; DGGE; AFLP; furunculosis; disease resistance; Arctic charr; brown trout; Atlantic salmon; population genetics; genetic variation; Mhc class IIB; Animal ecology;

    Sammanfattning : In this thesis I present studies concerning genomic diversity and genetic heterogeneity as well as the evolution and maintenance of genetic variation at a specific immune defence gene in Atlantic salmon (Salmo salar, L.). LÄS MER

  3. 2. Population divergence at small spatial scales : – theoretical and empirical investigations in perch

    Författare :Sara Bergek; Mats Björklund; Teija Aho; Sarah Goodacre; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Perca fluviatilis L.; Perch; Small scale genetic differentiation; Morphometrics; Isolation by distance; Dispersal; Gene flow; Microsatellites; Spatiotemporal stability; Barriers; Biology; Biologi; Terrestrial; freshwater and marine ecology; Terrestrisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

    Sammanfattning : Genetically structured populations arise when gene flow between groups of individuals is hindered by geographical, behavioural or temporal barriers. The identification of such groups is important for understanding evolution and has large implications for conservation concern. LÄS MER

  4. 3. Conservation biology and genetic structure of fringe populations of the scarce heath butterfly in Sweden

    Författare :Anna Cassel; Volker Loeschcke; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; fragmentation; genetic structure; mobility; inbreeding; habitat requirements; Lepidoptera; Genetik; Clinical genetics; Klinisk genetik; Conservation Biology; naturvårdsbiologi;

    Sammanfattning : During the past century, about 82% of meadows and pastures have been lost in Sweden, with negative consequences for their flora and fauna. An example is the scarce heath butterfly, which is one of the red-listed species threatened by such habitat loss through afforestation. LÄS MER

  5. 4. Assessing and monitoring genetic patterns for conservation purposes with special emphasis on Scandinavia

    Författare :Anna Palmé; Nils Ryman; Linda Laikre; Kerry Naish; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biological diversity; conservation genetics; management unit; spatial genetic structure; sympatric populations; genetic monitoring; release of alien populations; northern pike; brown trout; harbour porpoise; Biology; Biologi; populationsgenetik; Population Genetics;

    Sammanfattning : Genetic variation is essential for biological evolution, for maintaining viability of populations, and to ensure ecosystem resilience. Increased human exploitation and environmental change result in rapid loss of biological variation, including genetic diversity. LÄS MER

  7. 5. Evolutionary Processes and Spatial Genetic Variation in Euphrasia stricta on the Baltic Island of Gotland

    Författare :Anna-Karin Kolseth; Brita Svensson; Mikael Lönn; Joop Ouborg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; genetic differentiation; regional processes; conservation genetics; AFLP; microsatellites; gene flow; local adaptation; shape analysis; Ekologi;

    Sammanfattning : The identification of processes governing genetic structure at different spatial scales remains a major challenge in evolutionary biology and is of considerable applied interest in conservation biology. In Euphrasia stricta five varieties have been identified (brevipila, gotlandica, stricta, suecica and tenuis) based on differences in habitat, phenology and morphology. LÄS MER