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Showing result 1 - 5 of 57 swedish dissertations matching the above criteria.
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1. Ontogeny and Population Biology of a Sex-Limited Colour Polymorphism
Abstract : This study has involved investigation of number of populations of the damselfly Ischnura elegans over several years, looking at frequency changes over time, morphological differences between the sexes and the morphs, differences in growth rate and development time, differences in fecundity between the morphs, and genetic differentiation between populations. I. READ MORE
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2. On enchytraeids and naidids: Life history traits and responses to environmental stress
Abstract : My thesis shows that enchytraeids and naidids are sensitive to various forms of environmental stress, which in combination with the wide distribution of both families make them highly suitable for use in risk assessment and soil monitoring. Enchytraeids were subject to chemical stress under both laboratory and field conditions. READ MORE
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3. Behaviour of Lycaenid butterfly larvae in their mutualistic interactions with ants
Abstract : Interspecific mutualism often involves partners trading different kinds of services. The cost and benefits of the trade may differ from one interaction to the next, or fluctuate over time in a single interaction, due to factors both internal and external to the mutualism itself. READ MORE
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4. Ecology and conservation of the moth Dysauxes ancilla
Abstract : The ecology of the moth Dysauxes ancilla was studied in the only Swedish breeding area at Beijershamn, situated on the Baltic island of Öland. The population is a northern outpost, separated from the species´ continous distribution area in middle- and southeast Europe. READ MORE
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5. Ecology of red admiral migration
Abstract : The red admiral (Vanessa atalanta) is a migratory butterfly that can be found in North America, North Africa, Europe and some parts of Asia. In Europe the main part of the population spend winter in the Mediterranean region and the following spring leave this area to breed further to the north. READ MORE