Search for dissertations about: "Ethology and behavioural ecology"

Showing result 1 - 5 of 16 swedish dissertations containing the words Ethology and behavioural ecology.

  2. 1. Mobility and emigration in butterflies

    Author : Karin Enfjäll; Olof Leimar; Michel Baguette; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Keywords: conspecific density; dispersal; evolution; flight-behaviour; information; sexual conflict; social interactions; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Abstract : Because of its implications for the survival of many species, dispersal plays a key role in conservation biology. A good knowledge about the different factors that influence dispersal decisions is crucial for the understanding of inter-population movements. READ MORE

  4. 2. The Evolution of Sexually Homologous Ornaments : Selection via Male Mate Choice Coinciding with Male-Male Competition in a Neotropical Mosquito

    Author : Sandra South; Göran Arnqvist; Russell Bonduriansky; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; sexual selection; Sabethes cyaneus; Diptera; Culicidae; mosquito; mutual ornamentation; sexual selection; mutual mate choice; male mate choice; female ornament; ecology; animal behaviour; Ethology and behavioural ecology; Etologi och beteendeekologi; Animal Ecology; Zooekologi;

    Abstract : The evolution of elaborate male ornaments via sexual selection is well-understood while the selective pressures acting on female ornaments remains unresolved. Female ornaments in species with strong sexual selection on the male homologue of the ornament were originally thought to result from an intersexual genetic correlation. READ MORE

  5. 3. Predator psychology and mimicry evolution - a theoretical analysis

    Author : Alexandra Balogh; Olof Leimar; Michael Speed; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Müllerian mimicry; two-step evolution; gradual evolution; mutualism; predator psychology; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Abstract : The evolution of Müllerian mimicry depends on many factors, among which predator psychology is the most important one. Predator avoidance learning, generalization and discrimination are primary selective agents during the evolutionary process. READ MORE

  6. 4. Evolution of Dispersal and Habitat Exploration in Butterflies

    Author : Ulf Norberg; Hans Van Dyck; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Abstract : The development of wings may be one of the most important reasons for the great diversity among insects. Being able to move makes it possible to colonise new areas and explore resources in the surroundings. However, developing dispersal-related traits, like wings or flight muscles, is costly and moving can also be dangerous. READ MORE

  7. 5. Food choice in fallow deer – experimental studies of selectivity

    Author : Ulrika Alm Bergvall; Olof Leimar; Frederick D. Provenza; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; behavioural syndrome; neighbour contrast defence; neighbour contrast susceptibility; simultaneous negative contrast; plant secondary compounds; tannins; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Abstract : In this thesis, I experimentally investigate feeding selectivity in fallow deer (Dama dama), with respect to plant secondary compounds, especially tannins, which can decrease the quality of foods. I found that fallow deer avoided foods with higher amounts of tannic acid and Quebracho tannin, even though the deer ate some high-tannin food. READ MORE