Search for dissertations about: "Zoologi"
Showing result 1 - 5 of 454 swedish dissertations containing the word Zoologi.
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1. Celestial Orientation in Dim Light
Abstract : The polarization pattern of skylight offers many animals a reference for visual compass orientation. In those cases when this optical compass is identified, the receptors involved are often confined to a small part of an eye built predominantly for other visual tasks. READ MORE
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2. The soft bottom ecosystem of the northern Baltic proper with special reference to the macrofauna
Abstract : .... READ MORE
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3. Flower Cues for Hawkmoths: Colour, Place and Odour
Abstract : Flowers use different cues to attract pollinators including colour and odour. How do hawkmoths use these cues to find the flowers? This question was investigated in two species of hawkmoth, the diurnal species, Macroglossum stellatarum, and the nocturnal species, Deilephila elpenor. Both species have colour vision and D. READ MORE
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4. Maternal investment in male and female offspring in the fallow deer
Abstract : In this thesis, I investigate whether mothers of the polygynous fallow deer, Dama dama, bias their investment towards male offspring. I aim to answer the specific questions: (i) how is offspring fitness related to maternal investment?; (ii) do male fawns grow faster than female fawns during the period of maternal investment, and if so, why?; (iii) are male fawns more costly to raise than female fawns?; (iv) do fallow deer mothers adjust the sex of their offspring in relation to their ability to invest resources? To answer these questions I have collected and analysed data on reproduction of an enclosed fallow deer population and also performed an experimental study in which the level of investment was controlled for. READ MORE
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5. Mechanisms in the photoperiodic control of reproduction in the three-spined stickleback, Gasterosteus aculeatus
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