Search for dissertations about: "Karl Gotthard"
Showing result 1 - 5 of 15 swedish dissertations containing the words Karl Gotthard.
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1. Life history analysis of growth strategies in temperate butterflies
Abstract : .... READ MORE
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2. 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
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3. Body Size Evolution in Butterflies
Abstract : Life history research deals with the scheme of resource partitioning to a wide spectra of processes and the trade-offs shaping these events. One of the most fundamental life history trade-offs is the one of at which age- and size an organism should start to reproduce; reaching a large size at maturity is often advantageous in terms of high adult survival and reproductive potential, while to attain a larger size the organisms must prolong juvenile development which is assumed costly in terms of mortality. READ MORE
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4. The effect of climate on oak-based species interactions : annual number of leaf flushes and insect voltinism
Abstract : Plants interact with a large diversity of organisms, including insects and microorganisms. These species interactions are strongly influenced by climate, as illustrated by the advances in plant and insect phenology in response to increasing temperatures. READ MORE
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5. Life history evolution during a climate-driven butterfly range expansion
Abstract : Climate change pushes species polewards and upwards – as temperatures rise, species move to areas that were previously too cold for them. During range expansions, species encounter unfamiliar environmental conditions, which may require evolutionary adaptation, but expanding populations may often be hampered by their genetic and demographic properties. READ MORE