Sökning: "NATURVETENSKAP Biologi Övrig biologi"
Visar resultat 1 - 5 av 18 avhandlingar innehållade orden NATURVETENSKAP Biologi Övrig biologi.
1. Population Differentiation in Solidago virgaurea along Altitudinal Gradients
Sammanfattning : Altitudinal gradients offer attractive opportunities for studies of population differentiation in response to environmental heterogeneity. In this thesis, I examined population differentiation along altitudinal gradients by combining common-garden experiments with field studies and experiments in alpine, subalpine and boreal populations of the perennial herb Solidago virgaurea. LÄS MER
2. Optimal strategies and information in foraging theory
Sammanfattning : In this thesis, I present both theoretical and empirical work where we have studied how humans and animals use information in situations where they need to continually update their information on the density of a resource. We have found that the amount of information, and the way the information is presented, are important factors for how well decisions are adapted to current circumstances. LÄS MER
3. The estrogen receptor in fish and effects of synthetic estrogens in the environment - Ecological and evolutionary perspectives and societal awareness
Sammanfattning : Synthetic hormones are a group of pharmaceuticals used for various human and animal treatments. However, consumption and disposal of these substances have also given rise to negative effects and environmental problems for organisms in the wild which is why these substances have been classified as estrogenic endocrine-disrupting chemicals (EDCs). LÄS MER
4. Managing mountains, past and present conditions for traditional summer farming and Sami reindeer husbandry in northern Scandinavia
Sammanfattning : Traditional land use and conditions for maintenance of biodiversity are often interlinked. When land use changes and ecosystems change as a result, there is a risk to loose both the traditional ecological knowledge and the biodiversity connected to this land use. LÄS MER
5. The role of rodents in the transmission of Echinococcus multilocularis and other tapeworms in a low endemic area
Sammanfattning : Echinococcus multilocularis is zoonotic tapeworm in the Taeniidae family with a two part lifecycle involving a canid definitive host and a rodent intermediate host. The work of this thesis followed the first identification E. multilocularis in Sweden in 2011 in a red fox (Vulpes vulpes). LÄS MER
