Search for dissertations about: "plumage colour"

Showing result 1 - 5 of 9 swedish dissertations containing the words plumage colour.

  2. 1. Plumage Colours and the Eye of the Beholder : The Ecology of Colour and its Perception in Birds

    Author : Olle Håstad; Mats Björklund; Innes Cuthill; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; ultraviolet; colour vision; opsin; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Abstract : Virtually all diurnal birds have tetrachomatic vision based on four different colour receptors. As a result, birds are potentially able to perceive their environment in twice as many colours as humans and four times as many colours compared to most other mammals, which are dichromatic. READ MORE

  4. 2. Genomics and Transcriptomics of Behaviour and Plumage Colouration

    Author : Jesper Fogelholm; Dominic Wright; Göran Andersson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Genomics; Transcriptomics; Behaviour; Colour; Gene Expresssion; Domestication.;

    Abstract : The aim throughout this thesis has been to investigate the underlying genetics of behaviours and feather colour and plumage patterns by using chickens as a model organism. Chickens are extremely important as a food source, both in terms of egg, as well as meat production. READ MORE

  5. 3. Mapping Genes Affecting Phenotypic Traits in Chicken

    Author : Susanne Kerje; Leif Andersson; Martien Groenen; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; chicken; Quantitative Trait Loci; growth; egg production; epistasis; plumage colour; Extended black; MC1R; Dominant white; PMEL17; Genetik; Clinical genetics; Klinisk genetik;

    Abstract : The purpose of gene mapping is to understand the underlying genetics of simple and complex traits like plumage colour and growth. This thesis is based on a cross between the wild ancestor of the modern chicken, the red junglefowl, and a White Leghorn line selected for high egg mass. READ MORE

  6. 4. Bird Vision: Spatial acuity and colour discrimination in bright and dim light

    Author : Olle Lind; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal vision; Visual ecology; Colour vision; Spatial acuity; Spatial contrast sensitivity; Dim light; Visual modelling; Behavioural experiments; Birds; Psittaciformes;

    Abstract : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. READ MORE

  7. 5. Accessing Genetic Variation by Microarray Technology

    Author : Katarina Lindroos; Edwin Southern; Uppsala universitet; []
    Keywords : Medical sciences; microarrays; SNPs; minisequencing; four-colour detection; allele frequency; population study; evolutionary biology; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; Molekylär medicin; Molecular Medicine;

    Abstract : Microarray technology is a promising approach for the simultaneous analysis of multiple single nucleotide polymorphisms (SNPs), which are the most abundant form of genetic variation. In this thesis enzyme-assisted microarray-based methods were developed to improve the accuracy and genotype discrimination power of the current methods for SNP genotyping. READ MORE