Search for dissertations about: "Polyphenism"
Found 3 swedish dissertations containing the word Polyphenism.
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1. Life history evolution in a bivoltine butterfly
Abstract : Evolution is not always straight-forward, as selection pressures may differ between different generations of the same species. This thesis focuses on the evolution of life history of the model species, the Green-veined White butterfly Pieris napi. In central Sweden P. napi has two generations per year. READ MORE
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2. From environmental cue to phenotypic variation – a functional investigation of wing polyphenism in an emerging model species
Abstract : Phenotypic plasticity is a ubiquitous feature of living organisms and enable individuals to adapt to changing environments. A particularly prominent example of plasticity is found in polyphenisms, where environmental cues received during development leads to the generation of discrete variation in populations. READ MORE
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3. The diapause switch : Evolution of alternative developmental pathways in a butterfly
Abstract : Diapause decision is a classic example of a threshold switch mechanism with cascading effects on morphology, behaviour and life-history traits. This thesis addresses the downstream effects of the insect diapause switch, with the main focus on pathway-specific regulation of life-history traits, using the speckled wood butterfly (Pararge aegeria) as a study species. READ MORE