Search for dissertations about: "domestication effects"
Showing result 1 - 5 of 25 swedish dissertations containing the words domestication effects.
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1. Chicken domestication : Effects of tameness on brain gene expression and DNA methylation
Abstract : Domestication greatly increases phenotypic variation in a short time span, with selection for a single phenotype and a plethora of associated phenotypic changes as an outcome of the process. The domestication process influences the underlying genomic architecture of a species, and the success and speed of the process is likely influenced by it. READ MORE
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2. Domestication effects on foraging behaviour : consequences for adaptability in chickens
Abstract : The main aim of this thesis was to study domestication effects on foraging behaviour in chickens and to investigate whether and how domestication and selection for high production have influenced adaptability in chickens. Two domestic strains of chickens (egg layers and meat type chickens) and their wild ancestor, the red jungle fowl (RJF) were compared in different test situations with respect to foraging behaviour and adaptability. READ MORE
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3. The Physiology of Chicken Domestication : Involvement of the HPA-axis and the Autonomic Nervous System
Abstract : Domesticering är en urvalsprocess för önskvärda egenskaper hos djur som över tid förändrar deras utseende, beteende och genetik. Några exempel av djur som genomgått denna riktade avel är vargen, mufflon, uroxen, vildsvinet och den röda djungelhönan som vi idag känner som hunden, fåret, kon, grisen och slaktkycklingen. READ MORE
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4. Domestication Effects on the Stress Response in Chickens : Genetics, Physiology, and Behaviour
Abstract : Animal domestication, the process where animals become adapted to living in proximity to humans, is associated with the alteration of multiple traits, including decreased fearfulness and stress response. With an estimated population of 50 billion, the domesticated chicken is the most populous avian species in the world. READ MORE
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5. Correlated selection responses in animal domestication : the behavioural effects of a growth QTL in chickens
Abstract : Studying animal domestication offers an opportunity to understand the mechanisms of evolution. Domestication is associated with a change in selection pressures; selection for production traits is introduced, and animals are faced with larger and denser social groups. READ MORE