Search for dissertations about: "Rangifer tarandus"
Showing result 1 - 5 of 11 swedish dissertations containing the words Rangifer tarandus.
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1. Long-lasting ecological legacies of reindeer on tundra vegetation
Abstract : Reindeer can have strong effects on the plant species composition and functioning of tundra ecosystems, and often promote a transition towards a graminoid-dominated vegetation type. As a result, they influence many ecological processes, such as nutrient dynamics, soil biotic composition and functioning, and carbon storage. READ MORE
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2. Selection, Maternal Effects and Inbreeding in Reindeer Husbandry
Abstract : In extensive grazing systems where several owners’ flocks are allowed to mix, selection strategies will also interact, due to gene flow between flocks. The aim of the thesis was to analyse breeding schemes in terms of genetic gain and rate of inbreeding (?F), given the complexity of ownership and interaction of selection strategies within a mixing reindeer population. READ MORE
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3. Seasonal variations in general activity, behaviour and cutaneous glandular structures in reindeer (Rangifer tarandus L.)
Abstract : The locomotor activity of the reindeer is separated into a diurnal and a nocturnal phase which, in turn, consists of a number of short-term activity bursts. The onset and termination of diurnal and nocturnal activity are largely in synchrony with sunrise and sunset. READ MORE
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4. Effects of winter-feeding on reindeer’s future ability to utilize natural pastures
Abstract : Winter feeding of reindeer (Rangifer tarandus tarandus) has become an increasingly common management action in reindeer husbandry in Sweden, Finland, and Norway when natural grazing resources are unavailable due to the loss of grazing grounds, disturbances, and icing events. In the short term, feeding increases survival and reproduction, but the long-term effects on reindeer’s ability to utilize natural pastures have not been investigated. READ MORE
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5. Adaptations of mobile ungulates in a changing North
Abstract : The combined effects of global warming and land use changes experienced by animals at high latitudes, are poorly understood. Social and eco-physiological perspectives are therefore necessary to elucidate where and when animals and the ecosystems they represent are most vulnerable to environmental change. READ MORE