Sökning: "Ducks"
Visar resultat 1 - 5 av 20 avhandlingar innehållade ordet Ducks.
1. Mallard ducks : mate choice and breeding success
Sammanfattning : .... LÄS MER
2. Influenza A virus in wild birds
Sammanfattning : Influenza virus is a RNA virus that exists as different types and subtypes. Influenza A virus strains are known to cause disease in several bird and mammalian species. Wild birds are believed to constitute the natural reservoir for influenza A virus. LÄS MER
3. Dissertatio botanico-oeconomica de esca avium domesticarum, quam consens. exper. facult. medicæ. in Regia academia Upsaliensi, præside ... D:no Doct. Carolo v Linné ... in audit. Carol maj. d. [26] Nov. 1774 ... defendet auctor et respondens Petrus Holmberger alumnus regius, Ostro-Gothus
Sammanfattning : .... LÄS MER
4. Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos
Sammanfattning : Measuring and assessing vital rates such as births and deaths are prerequisites for understanding population dynamics. Vital rates may be affected by the density of individuals, even though the importance of density dependence on population dynamics has been debated for a long time. LÄS MER
5. The influence of food abundance patterns and predation on breeding ducks with a special emphasis on the interactions between ducklings and fish
Sammanfattning : Ducks breeding in Fennoscandia represent a large part of the total population in Europe, and variations in reproductive success can affect continental population trajectories. It is therefore essential to understand processes affecting breeding success. LÄS MER