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Visar resultat 1 - 5 av 71 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Ecology and Evolution of Adaptive Morphological Variation in Fish Populations

    Författare :Richard Svanbäck; Peter Eklöv; Lennart Persson; Beren Robinson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; competition; functional morphology; individual specialization; inter-individual variation; intra-population variation; morphological variation; ontogeny; Perca fluviatilis; perch; phenotypic plasticity; predation; trade-offs; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : The work in this thesis deals with the ecology and evolution of adaptive individual variation. Ecologists have long used niche theory to describe the ecology of a species as a whole, treating conspecific individuals as ecological equivalent. LÄS MER

  3. 2. Post-zygotic Genetic Variation in Health and Disease

    Författare :Hamid Reza Razzaghian; Jan P. Dumanski; David Gisselsson Nord; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Post-zygotic genetic variation; monozygotic twins; copy number variation; single nucleotide polymorphism; variable number tandem repeat; Medical Genetics; Medicinsk genetik;

    Sammanfattning : Post-zygotic genetic variation has previously been shown in healthy individuals and linked to various disorders. The definition of post-zygotic or somatic variation is the existence of genetically distinct populations of cells in a subject derived from a single zygote. LÄS MER

  4. 3. The impact of genetics, environmental, and geographical factors on inter-individual and inter-ethnic differences in CYP2C9-catalysed drug metabolism

    Författare :Fazleen Haslinda Mohd Hatta; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Inter-individual and inter-ethnic variations in drug metabolism are creating an obstacle in providing efficient and effective drug treatments especially for drugs with narrow therapeutic windows. This thesis is contributes to the understanding of the molecular mechanism of these variations. LÄS MER

  5. 4. Causes and consequences of individual variation in anti-predator traits

    Författare :Kaj Hulthén; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal migration; partial migration; individual differences; predator; personality trait; phenotypic plasticity; inducible defence; mortality risk;

    Sammanfattning : Predation imposes a potent evolutionary force on prey, moulding the evolution of traits and diversification of species, and can furthermore have powerful ecological consequences. We know that different species vary in how they cope with their natural enemies, and, consequently, a huge range of anti-predator defences are displayed in nature. LÄS MER

  7. 5. Urinary steroid profiles in doping testing : in relation to natural variation and drug administration

    Författare :Jenny Mullen; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : To detect doping with endogenous steroids, such as testosterone, biomarkers in urine are measured. These biomarkers include testosterone and some metabolically related steroids. The measured steroids are combined into ratios and together they make up the steroid profile. LÄS MER