Search for dissertations about: "mating frequencies"
Showing result 1 - 5 of 11 swedish dissertations containing the words mating frequencies.
-
1. Adaptive significance of queen mating frequency in ants : In search of benefits of genetic variability
Abstract : Fitness effects of polyandry, multiple mating by females, were studied on two ant speciesLasius niger and Formica truncorum. Particular emphasis was put on evaluating diploid male load, which happens when homozygosity in the sex determination locus leads to intendedfemales developing into sterile, diploid males. READ MORE
-
2. Genetic epidemiological aspects of obesity and related traits. Human studies in Swedish and North-American cohorts
Abstract : Aims: To investigate two obesity candidate genes, the melanocortin-4 receptor (MC4R) and the adiponectin hormone (APM1), by screening their genomic sequences. To search the human genome for quantitative trait loci (QTLs) related to resting metabolic rate (RMR), and respiratory quotient (RQ). READ MORE
-
3. Factors Influencing Evolution to Antimalarial Drug Resistance in Plasmodium falciparum in Sudan and The Gambia
Abstract : Drug resistance is a major obstacle to management and control of malaria and currently progressing at a rapid rate across Africa. This thesis has examined factors influencing evolution of resistant P. falciparum at two sites in Africa, including parasite migration, cross mating and fitness cost of resistance. READ MORE
-
4. On Contact Mechanisms and Mechanical Transmission Performance
Abstract : This thesis consists of four papers, which treat the modelling of a spur gear set and a disc brake, and the interaction between the machine elements. Features of the performance are studied in relation to the initial stated assumptions. READ MORE
-
5. Finding fitness : empirical and theoretical explorations of inferring fitness effects from population-level SNP data
Abstract : The distribution of fitness effects (DFE) describes the likelihood that a new mutation has a specific effect on the fitness of an individual in a given population. The shape of the DFE is a result of several factors such as population size, mating system and selective environment, and can in turn influence the evolutionary potential of a species. READ MORE