Sökning: "natal dispersal"

Visar resultat 11 - 15 av 16 avhandlingar innehållade orden natal dispersal.

  1. 11. Sperm Whales : Social Organization and Global Genetic Structure

    Författare :Thomas Lyrholm; Mark Stoneking; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zoologi; Zoology;

    Sammanfattning : The social organization of most mammals is characterised by female philopatry and male dispersal. This thesis examines the social organization of sperm whales, Physeter macrocephalus, using a combination of field observations and molecular genetic techniques. LÄS MER

  3. 12. Distribution and abundance of genetic variation in the arctic fox

    Författare :Love Dalén; Anders Angerbjörn; Robert K. Wayne; Stockholms universitet; []
    Nyckelord :population genetics; DNA; ecology; population history; gene flow; Alopex lagopus;

    Sammanfattning : This thesis investigates how changes in population size and spatial movements of individuals have shaped the distribution and abundance of neutral genetic variation in the arctic fox. This is done through mitochondrial and microsatellite DNA analyses on samples covering most of the species’ distribution, but with special emphasis on Scandinavia. LÄS MER

  4. 13. 'O neighbour, where art thou?' : spatial and social dynamics in wolverine and lynx, from individual space use to population distribution

    Författare :Malin Aronsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The organisation of individuals in space and time influences population structure and dynamics, and is important for our understanding of animal ecology. The aim of this thesis is to gain an increased understanding of the mechanisms driving the abundance and distribution of solitary carnivores, from individual space use to population-level distribution. LÄS MER

  5. 14. Consequences of Environmental Variation for Fish and Their Skin Associated Microbial Communities

    Författare :Hanna Berggren; Anders Forsman; Per Larsson; Mark Dopson; Jarone Pinhassi; Richard Svanbäck; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi;

    Sammanfattning : Environmental conditions that vary in space and time influence the distribution, abundance, diversity and evolution of individuals, populations, species and communities. This thesis explores how environmental variation affects diversity at different levels of biological organization, and across a wide range of spatiotemporal scales, by studying fish and their associated microbiomes. LÄS MER

  7. 15. Living in a Variable Environment : Reproductive Decisions in Wild Bird Populations

    Författare :Mårten B. Hjernquist; Lars Gustafsson; Marcel Visser; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; evolutionary ecology; competition; sex allocation; paternity; EPP; inadvertent social information; migration; breeding density; territory quality; territory availability; great tit; blue tit; Ficedula albicollis; Biology; Biologi; Animal Ecology; zooekologi;

    Sammanfattning : In nature, environments are often variable and heterogeneous influencing ecological and evolutionary processes. This thesis focus on how animals interact with their environment and how that affects the reproductive decisions they make. LÄS MER