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Showing result 1 - 5 of 10 swedish dissertations matching the above criteria.
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1. Predator responses to non-stationary rodent cycles
Abstract : Regular fluctuations in population size, cycles, are common in small mammals and have important effects on predator populations and life histories. In this thesis, I identify long-term patterns and processes in two specialist predators, the arctic fox Vulpes lagopus and the rough-legged buzzard Buteo lagopus, in relation to their prey (lemmings and voles) and in the case of the arctic fox also to a dominant competitor, the red fox Vulpes vulpes. READ MORE
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2. Studies of declining populations - temporal genetic analyses of two arctic mammals
Abstract : Many populations and species are threatened with extinction today. Understanding the extinction process and the factors behind population decline is therefore important. READ MORE
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3. Survival in a small and endangered arctic fox (Vulpes lagopus) population
Abstract : .... READ MORE
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4. To survive and reproduce in a cyclic environment – demography and conservation of the Arctic fox in Scandinavia
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
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5. Spatial and temporal population dynamics in the mountain tundra – mesopredator and prey
Abstract : It is well known that competition, predation and fluctuating food resources can have strong effect on individual fitness and population dynamics. The complexity of natural systems can make it complicate to disentangle those processes, but environments with relatively simple food webs, and strong cyclic population dynamics offer contrasting conditions resembling experimental treatments. READ MORE