Search for dissertations about: "environmental cue"

Showing result 1 - 5 of 19 swedish dissertations containing the words environmental cue.

  2. 1. Fish on drugs : behaviour modifying contaminants in aquatic ecosystems

    Author : Annelie Lagesson; Jonatan Klaminder; Tomas Brodin; Kathryn Arnold; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Aquatic ecosystems; Behavioural effects; Ecotoxicology; Endocrine disruptors; Pharmaceuticals; Interaction effects; ekotoxikologi; Ecotoxicology;

    Abstract : Contamination of surface waters is a worldwide problem. One group of emerging contaminants that reach aquatic ecosystems via sewage treatment plant effluents and agricultural run-offs is pharmaceuticals. READ MORE

  4. 2. From environmental cue to phenotypic variation – a functional investigation of wing polyphenism in an emerging model species

    Author : Erik Gudmunds; Arild Husby; Laura C. Lavine; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gerris buenoi; water strider; wing polyphenism; photoperiodism; Fat Hippo signaling; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Abstract : Phenotypic plasticity is a ubiquitous feature of living organisms and enable individuals to adapt to changing environments. A particularly prominent example of plasticity is found in polyphenisms, where environmental cues received during development leads to the generation of discrete variation in populations. READ MORE

  5. 3. 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

  6. 4. Factors affecting alcohol self-administration : learning, environmental and genetic influences on behaviour

    Author : Christopher Pickering; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ethanol; operant self-administration; addiction; reward; learning; lever press response; context; environmental cue; novelty; stress; glutamate; GABA; noradrenaline; PCR; gene expression; functional genomics; prefrontal cortex; hippocampus; amygdala;

    Abstract : Alcoholism is a serious problem for society and is a very difficult disease to treat clinically. Often, the addict has periods of abstinence from alcohol followed by relapse to drinking and this cycle of use/non-use can repeat over many years. READ MORE

  7. 5. Social and environmental olfactory signals mediate insect behavioral ecology and evolution

    Author : Felipe Borrero; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Odors are essential in mediating insect reproductive behavior. Environmental odors help insects locate suitable feeding or egg-laying sites and avoid suboptimal hosts or dangerous habitats. Sex pheromones, on the other hand, are responsible for mate finding and elicit courtship and mating. READ MORE