Search for dissertations about: "Djurekologi"

Showing result 6 - 10 of 57 swedish dissertations containing the word Djurekologi.

  2. 6. On starlings and farming: population decline, foraging strategies, cost of reproduction and breeding success

    Author : Måns Bruun; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; breeding success; foraging strategies; intensification; agricultural methods; population decline; farmland bird; cost of reproduction; Animal ecology; Djurekologi;

    Abstract : The European Starling Sturnus vulgaris as many other farmland bird species has been declining during the last decades. The cause of these declines is generally believed to be changes with in agricultural methods affecting breeding and survival of birds. READ MORE

  4. 7. Bird orientation: external cues and ecological factors

    Author : Johan Bäckman; Evolutionär ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; tracking radar; Emlen funnel.; Animal ecology; Djurekologi; oscillatory orientation; roosting flight; scatter; concentration; heading; cue calibration; light dependent; magnetoreception; subcutaneous fat stores; body condition; energetics; geomagnetic field; visual cues; orientation; birds; migration;

    Abstract : Birds are generally capable of accurate orientation. In this thesis I present studies about the external cues and the ecological factors that influences bird orientation. A multitude of environmental cues are used to select and maintain a proper direction. READ MORE

  5. 8. Game theory studies on aggressive behaviour

    Author : Magnus Enquist; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Zoologi; Djurekologi; Djurpsykologi; Aggression;

    Abstract : .... READ MORE

  6. 9. Insect Diversity in Changing Landscapes

    Author : Markus Franzén; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; växtparasitologi; Entomologi; plant parasitology; Zoology; Zoologi; Entomology; Ekologi; Ecology; butterfly; bee; dispersal; extinction; Djurekologi; Animal ecology;

    Abstract : During recent decades, concern about the loss of biodiversity has increased. To change this negative trend there is an urgent need for effective conservation measures and there are ample evidence that conservation of organisms without an understanding of their ecology and behaviour is impossible. READ MORE

  7. 10. Bioaccumulation and cycling of hydrophobic organic contaminants by Baltic Sea blue mussels, Mytilus edulis L

    Author : Michael Gilek; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Musslor; Bivalvia; Djurekologi; Djurpsykologi;

    Abstract : .... READ MORE