Search for dissertations about: "Djurekologi"

Showing result 1 - 5 of 55 swedish dissertations containing the word Djurekologi.

  1. 1. Ontogeny and Population Biology of a Sex-Limited Colour Polymorphism

    University dissertation from Xanto Grafiska AB

    Author : Jessica Abbott; Lund University.; Lunds universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; embryologi; ontogeni; animal morphology; embryology; Utvecklingsbiologi; Damselflies; Colour polymorphism; Development; Frequency-dependence; Morphology; growth animal ; ontogeny; Animal anatomy; Development biology; Djurs anatomi och morfologi; Population divergence; Animal ecology; Djurekologi;

    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

  2. 2. On enchytraeids and naidids: Life history traits and responses to environmental stress

    University dissertation from Anna-Karin Augustsson

    Author : Anna-Karin Augustsson; Lund University.; Lunds universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; oligochaeta; terrestrial naididae; toxicity testing; asexual reproduction; sexual reproduction; drought; environmental stress; metal pollution; Ekologi; Animal ecology; Djurekologi;

    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

  3. 3. Behaviour of Lycaenid butterfly larvae in their mutualistic interactions with ants

    University dissertation from Stockholm : Department of Zoology, Stockholm University

    Author : Annkristin H. Axén; Stockholms universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fjärilar; myror; djurekologi; etologi; Ethology;

    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

  4. 4. Ecology and conservation of the moth Dysauxes ancilla

    University dissertation from Per-Eric Betzholtz, Dept of Biology and Environmental Sciences, University of Kalmar, SE-39182 Kalmar, Sweden

    Author : Per-Eric Betzholtz; Lund University.; Lunds universitet.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Evolutionary Biology; Evolutionsbiologi; Animal ecology; Djurekologi; marc-recapture; population viability; fluctuating asymmetry; genetic status; larval feeding; movements; endangered species; conservation; outpost population; Lepidoptera; Dysauxes ancilla;

    Abstract : Popular Abstract in Swedish Ekologin hos lavdagsvärmaren (Dysauxes ancilla) studerades inom den enda svenska populationen vid Beijershamn på Öland. Populationen utgör en isolerad förekomst på nordgränsen av artens utbredningsområde, som huvudsakligen är mellan- och sydosteuropeiskt. Arten är rödlistad som akut hotad. READ MORE

  5. 5. Ecology of red admiral migration

    University dissertation from Department of Animal Ecology, Lund University

    Author : Oskar Brattström; Lund University.; Lunds universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nymphalidae; Lepidoptera; migration patterns; migration; genetic structure; AFLP; lipid content; Inachis io; stable isotopes; orientation; navigation; weather; Animal ecology; red admiral; Vanessa atalanta; Djurekologi;

    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