Search for dissertations about: "Phylloscopus trochilus"

Showing result 1 - 5 of 6 swedish dissertations containing the words Phylloscopus trochilus.

2. 1. Migratory behavior and its genetic basis in willow warblers Phylloscopus trochilus

   Author : Kristaps Sokolovskis; MEMEG; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; bird migration; behavioral genetics; light level geolocator; Phylloscopus trochilus; willow warbler;

   Abstract : 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. READ MORE

4. 2. Hybrid zone dynamics, assortative mating, and migratory programmes in a willow warbler migratory divide

   Author : Keith W. Larson; Susanne Åkesson; Staffan Bensch; Martin Schaefer; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; migratory divide; phenotype; willow warbler; hybrid zone; tension zone; Phylloscopus trochilus; migratype; assortative mating; migration; biology; biologi; evolutionär genetik; evolutionary genetics; migratory divide; phenotype; willow warbler; hybrid zone; tension zone; Phylloscopus trochilus; migratype; assortative mating; migration;

   Abstract : 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. READ MORE

5. 3. Climate change effects on migratory birds and on the ecology and behaviour of the willow warbler (Phylloscopus trochilus)

   Author : Johanna Hedlund; Sven Jakobsson; Thord Fransson; Cecilia Kullberg; Sara Cousins; Martin Schaefer; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; climate change; bird migration; ecology; phenology; bird; avian; willow warbler; chaffinch; land use change; landscape ecology; historical ecology; etologi; Ethology;

   Abstract : 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. READ MORE

6. 4. Analysis of genomic data as an approach to understanding migration in song birds

   Author : John Boss; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : 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. READ MORE

7. 5. Genomic analyses of migratory divides in the willow warbler

   Author : Max Lundberg; MEMEG; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : 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. READ MORE