Sökning: "plumage colour"

Hittade 5 uppsatser innehållade orden plumage colour.

  1. 1. Species composition and age ratio of rock ptarmigan (Lagopus muta) and willow grouse (Lagopus lagopus) shot or snared in the county of Västerbotten : possible implementations for grouse winter management

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Alisa Brandt; [2016]
    Nyckelord :willow grouse; rock ptarmigan; lagopus; hunt; winter; management; age; species identification;

    Sammanfattning : Hunting has a long tradition in Sweden and is also nowadays well established in society, provides considerable income through hunting tourism and functions as an important wildlife management and conservation tool. The most popular game species in the Swedish mountains are willow grouse (Lagopus lagopus) and rock ptarmigan (Lagopus muta). LÄS MER

  3. 2. Effects of the adaptive background in the spectral sensitivity of budgerigars (Melopsittacus undulatus)

    Master-uppsats, Lunds universitet/Examensarbeten i biologi

    Författare :Johanna Chávez; [2012]
    Nyckelord :Biology and Life Sciences;

    Sammanfattning : ABSTRACT The objective of this project was to study if the adaptive background affects the spectral sensitivity of budgerigars (Melopsittacus undulatus) tested in bright light. Two budgerigars were trained, by associative learning with food rewards, in dual choice tests to discriminate monochromatic light stimuli of nine different wavelengths from an adaptive background with ultraviolet light (UV) content. LÄS MER

  4. 3. The genetic basis of a domestication trait in the chicken: mapping quantitative trait loci for plumage colour

    Master-uppsats, Biologi; Tekniska högskolan

    Författare :Md. Nazmul Huq; [2012]
    Nyckelord :qtl; quantitative trait loci; genome scan; qtl analysis; plumage colour; domestication trait; chicken; pigmentation trait;

    Sammanfattning : Domestication is the process by which animals become adapted to the environment provided by humans. The process of domestication has let to a number of correlated behavioural, morphological and physiological changes among many domesticated animal species. An example is the changes of plumage colour in the chicken. LÄS MER

  5. 4. Eigen-birds : Exploring avian morphospace with image analytictools

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för teknikvetenskaper

    Författare :Mikael Thuné; [2012]
    Nyckelord :image analysis; eigen-birds; eigen; principal component analysis; pca; birds; avian; warping; biharmonic splines; affine transformation;

    Sammanfattning : The plumage colour and patterns of birds have interested biologists for a long time.Why are some bird species all black while others have a multitude of colours? Does ithave anything to do with sexual selection, predator avoidance or social signalling?Many questions such as these have been asked and as many hypotheses about thefunctional role of the plumage have been formed. LÄS MER

  7. 5. Linkage mapping of phenotypic markers and marker identification in MHC in a cross between red junglefowl and Obese strain chicken

    L3-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Malin Lindåse; [2007]
    Nyckelord :chicken; feather colour; mapping; MHC; molecular marker;

    Sammanfattning : Målet med detta projekt var att i en korsning mellan röd djungelhöna och Obese strain höna kartlägga, med kopplingsanalys, de fenotypiska markörerna fjäderdräktsfärg, fjädermönster och benfärg samt att identifiera en informativ markör i major histocompatibility complex (MHC). Den röda djungelhönan anses vara anfadern till dagens domesticerade höna och Obese strain hönan utvecklar spontan autoimmun tyroidit och är modelldjur för den humana sjukdomen Hashimotos tyroidit. LÄS MER