Search for dissertations about: "biological cost"
Showing result 1 - 5 of 337 swedish dissertations containing the words biological cost.
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1. Population Differentiation in Solidago virgaurea along Altitudinal Gradients
Abstract : 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. READ MORE
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2. Evolutionary Dynamics of Mutation and Gene Transfer in Bacteria
Abstract : The study of bacterial evolution is fundamental for addressing current problems of antibiotic resistance and emerging infectious diseases and lays a solid foundation for successful and rational design in biotechnology and synthetic biology. The main aim of this thesis is to test evolutionary hypotheses, largely based on theoretical considerations and sequence analysis, by designing scenarios in a laboratory setting to obtain experimental data. READ MORE
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3. The biological cost of resistance to antibiotics
Abstract : The rate of development and stability of antibiotic resistance are determined by several factors including (i) the mutation rate, (ii) the fitness costs of resistance, and (iii) the ability of bacteria to genetically compensate for such costs.. This study has focused on the experimental measurement of these parameters in antibiotic-resistant S. READ MORE
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4. Optimal strategies and information in foraging theory
Abstract : 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. READ MORE
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5. Sensitivity, Variation, and Application of Least-Cost Path Models in Landscape Connectivity Analysis and Corridor Planning
Abstract : In recent decades, Rwanda has been affected by the loss and fragmentation of natural habitats for native species of animals and plants. As a consequence, landscape connectivity—i.e. READ MORE