Sökning: "Hatching time"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden Hatching time.

  1. 1. Egg-laying and nesting behavior of common eider at Stora Karlsö

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Anna Olsson; [2023]
    Nyckelord :;

    Sammanfattning : The population of common eider (Somateria mollissima) has suffered a dramatic decline in several breeding locations since the 1990s. Predation is described as one of the main reasons, along with other suggested explanations such as food shortage, environmental pollutants, and thiamine shortage. LÄS MER

  3. 2. Can spawning site temperature regimes cause spawning time divergence in sympatric whitefish ecotypes? : Comparison of two hypotheses

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Joni Riihimaa; [2023]
    Nyckelord :Coregonus lavaretus; Hatching time; Spawning habitat; Spawning time; Temperature dependence;

    Sammanfattning : The spawning time differs between sympatric ecotypes of lake-dwelling whitefish (Coregonus lavaretus) and this temporal divergence can be linked to the type of spawning habitat used (i.e., streams, littoral or profundal). LÄS MER

  4. 3. Color halftoning methods for screen printing and special effect pigments : Reproducing iridescent colors

    Master-uppsats, Linköpings universitet/Institutionen för teknik och naturvetenskap

    Författare :Alfred Rundquist; [2023]
    Nyckelord :iridescence; color; halftoning; screen; printing; ink; special; effect; pigments; media technology; simulation; iriserande; färg; rastrering; metod; screentryck; silkscreentryck; raster; färgreproduktion; simulering;

    Sammanfattning : Iridescence is the property that makes colors vary by angle of observation. Technology has made it possible to print with ink that has this anisotropic property. The ink that is used contains microparticles and therefore only specific printing methods can be used, for example screen printing. LÄS MER

  5. 4. Common Guillemots Uria aalge Alter Trip Patterns During Breeding

    Kandidat-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Mica Bohacek; [2022]
    Nyckelord :Common Murre; Stora Karlsö; trip duration; trip frequency; central-place foragers; feeding rate; time-budget;

    Sammanfattning : Seabirds are facing immense pressures, primarily induced by competition with commercial fisheries; this is of considerable concern due to the critical role that they play in marine food webs and their invaluable function as bioindicators. In this thesis, I studied the temporal change in trip duration for the Common Guillemot Uria aalge, a circum-arctic seabird species. LÄS MER

  7. 5. Common Guillemots Uria aalge Alter Trip Patterns During Breeding

    Kandidat-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Mica Bohacek; [2022]
    Nyckelord :Common Murre; Stora Karlsö; trip duration; trip frequency; central-place foragers; feeding rate; time-budget;

    Sammanfattning : Seabirds are facing immense pressures, primarily induced by competition with commercial fisheries; this is of considerable concern due to the critical role that they play in marine food webs and their invaluable function as bioindicators. In this thesis, I studied the temporal change in trip duration for the Common Guillemot Uria aalge, a circum-arctic seabird species. LÄS MER