Global ETD Search

1	Understanding the evolutionary ecology of dispersal : an experimental approach using the bacterium Pseudomonas aeruginosa Taylor, Tiffany B. January 2011 (has links) Understanding dispersal is a central aim of evolutionary ecology. Theoretical analyses of dispersal have been crucial in identifying key variables which contribute to its evolution and maintenance, but the supporting empirical data remains elusive. Microbes offer a powerful model system on which ecological and evolutionary theory can be experimentally tested with controlled and replicated experiments, and with the convenient malleability of selective pressures and bacterial genomics. Pseudomonas aeruginosa is an ubiquitous, opportunistic pathogen that is able to induce acute or chronic infections in a broad array of hosts. As well as in vivo environments, P. aeruginosa can be found in a range of ecological habitats, from solid to aqueous, and as such requires a variety of dispersal mechanisms (including swimming, gliding on a surfactant and ‘crawling’) for effective colonisation and infectivity. In this thesis, I present a collection of papers which outline empirical ecological and evolutionary experiments to identify the abiotic and biotic forces that shape the evolution of these different dispersal mechanisms, with particular focus on the theoretically important role of kin competition and the structure of the abiotic environment. 579
2	Strategies of Sexual Reproduction in Aphids / Fortpflanzungsstrategien der Sexuellen Generation von Blattläusen Dagg, Joachim 30 October 2002 (has links) No description available. 570 Biowissenschaften, Biologie Mathematics and Computer Science Strategie Kopulationsdauer Spermienkonkurrenz Spermien-Kooperation Marginal Value Theorem Paarungsverhalten Partner-Bewachung Partnerwahl Konkurrenz Geschlechter-Verhältnis Geschlechter-Verteilung springende Gene Transposons; strategy copula duration sperm competition sperm co-operation marginal value theorem courtship mate guarding mate choice mate competition kin competition sex ratio sex allocation jumping genes transposon ancient asexual scandals paradox of sexual reproduction replicator interactor Uroleucon cirsii Uroleucon cichorii Euceraphis betulae Schizolachnus obscurus Rhopalosiphum padi; 42.21 Evolution 42.66 Ethologie 42.67 Fortpflanzung 42.75 Insecta 42.97 Ökologie: Sonstiges

Search results

Understanding the evolutionary ecology of dispersal : an experimental approach using the bacterium Pseudomonas aeruginosa

Strategies of Sexual Reproduction in Aphids / Fortpflanzungsstrategien der Sexuellen Generation von Blattläusen