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Showing result 1 - 5 of 15 swedish dissertations matching the above criteria.

  2. 1. Life history analysis of growth strategies in temperate butterflies

    Author : Karl Gotthard; David Sloan Wilson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; zoologisk ekologi; Animal Ecology;

    Abstract : .... READ MORE

  4. 2. The diapause switch : Evolution of alternative developmental pathways in a butterfly

    Author : Inger Marie Aalberg Haugen; Karl Gotthard; Dan Hahn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental plasticity; phenotypic plasticity; developmental switch; threshold trait; life-cycle regulation; direct development; Lepidoptera; zoologisk ekologi; Animal Ecology;

    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

  5. 3. Body Size Evolution in Butterflies

    Author : David Berger; Karl Gotthard; Wolf Blanckenhorn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Body size evolution; age- and size at maturity; life history theory; fecundity; predation risk; juvenile growth rate; Lepidoptera; Biology; Biologi; zoologisk ekologi; Animal Ecology;

    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

  6. 4. The effect of climate on oak-based species interactions : annual number of leaf flushes and insect voltinism

    Author : Álvaro Gaytán; Ayco J. M. Tack; Karl Gotthard; Kailen A. Mooney; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; climate change; food webs; latitude; leaf flush; plant-based species interactions; Quercus robur; voltinism; Ecology and Evolution; ekologi och evolution;

    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

  7. 5. Life history evolution during a climate-driven butterfly range expansion

    Author : Mats Ittonen; Karl Gotthard; Philipp Lehmann; Christopher Wheat; Sarah Diamond; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; climate change; diapause; genomics; insect cold tolerance; life cycle; local adaptation; parallel evolution; photoperiodism; reciprocal transplant; zoologisk ekologi; Animal Ecology;

    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