Sökning: "willow warbler"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden willow warbler.
1. Hybrid zone dynamics, assortative mating, and migratory programmes in a willow warbler migratory divide
Sammanfattning : In this thesis I will compare and contrast the two willow warbler subspecies (Phylloscopus trochilus trochilus and P. t. acredula) with differing migratory phenotypes (or "migratype") in the context of their migratory divide and hybrid zone in central Sweden. Their migratory programs differ in the direction and distance traveled during migration. LÄS MER
2. Climate change effects on migratory birds and on the ecology and behaviour of the willow warbler (Phylloscopus trochilus)
Sammanfattning : Recent global climate change is influencing the behaviour and ecology of species worldwide. Birds are typical systems to study in this context, as they are often migratory and thus subjected to a variety of environmental effects. LÄS MER
3. Migratory behavior and its genetic basis in willow warblers Phylloscopus trochilus
Sammanfattning : Right before northern hemisphere’s summer shifts to autumn small insect-eatingbirds start lengthy journeys to tropical regions. It is well established that temporarylack food and annual changes in weather are the ultimate reasons for this behavior.On a proximal level however, the process is poorly understood. LÄS MER
4. Genomic analyses of migratory divides in the willow warbler
Sammanfattning : In many species of birds juveniles migrate independently of experienced adults and thus have to rely on innate information about migratory routes and wintering area. This information is encoded as a set of inherited migratory directions and a timing schedule that provides information on when and how far to migrate. LÄS MER
5. Analysis of genomic data as an approach to understanding migration in song birds
Sammanfattning : Many species of birds migrate every year thousands of kilometers, relying on sight, memory, magnetic sensors and instincts to find their way across continents. Many juvenile birds travel complicated migration routes without the guidance of more experienced adults. LÄS MER