Search for dissertations about: "Alopex"

Found 5 swedish dissertations containing the word Alopex.

  2. 1. Distribution and abundance of genetic variation in the arctic fox

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

    Abstract : 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. READ MORE

  4. 2. To survive and reproduce in a cyclic environment – demography and conservation of the Arctic fox in Scandinavia

    Author : Tomas Meijer; Anders Angerbjörn; Bodil Elmhagen; Claudio Sillero-Zubiri; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Conservation; life-history; Alopex lagopus; survival; zoologisk ekologi; Animal Ecology;

    Abstract : This thesis concerns the conservation and life history of the Arctic fox (Vulpes lagopus) in Scandinavia. The Arctic fox was historically a widely distributed species in the Scandinavian mountain tundra with a population size of approximately 10 000 individuals during years with high resource availability, i.e. rodent peaks. READ MORE

  5. 3. Interference competition between arctic and red foxes

    Author : Bodil Elmhagen; Devra G Kleiman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Terrestrial ecology; Terrestisk ekologi;

    Abstract : In this thesis, I investigate the relationship between arctic foxes Alopex lagopus and red foxes Vulpes vulpes in Swedish mountain tundra habitat (fjällen). The arctic fox population was severely reduced by hunting in the early 20th century. READ MORE

  6. 4. Population fluctuations and life history consequences in the arctic fox

    Author : Magnus Tannerfeldt; David Macdonald; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi; zoologisk ekologi; Animal Ecology;

    Abstract : In this thesis, I describe and explain drastic population fluctuations in the arctic fox Alopex lagopus (L.). I proceed to examine evolutionary consequences of unpredictable fluctuations in terms of life history strategies. In fluctuating populations, the risks and benefits of different behaviours vary with changes in population density. READ MORE

  7. 5. IMPROVING DIFFERENTIAL EVOLUTION WITH ADAPTIVE AND LOCAL SEARCH METHODS

    Author : Miguel Leon; Ning Xiong; Peter Funk; Yigen Zenlander; Kristian Sandström; Mälardalens högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Differential Evolution; Adaptation; Memetic algorithm; Evolutionary Algorithm; Computer Science; datavetenskap;

    Abstract : Differential Evolution (DE) is a population-based algorithm that belongs to the Evolutionary algorithm family. During recent years, DE has become a popular algorithm in optimization due to its strength solving different types of optimization problems and due to its easy usage and implementation. READ MORE