Sökning: "Phylloscopus"
Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet Phylloscopus.
1. Species Limits and Systematics in Some Passerine Birds
Sammanfattning : I use morphological, vocal, molecular, behavioural, ecological and distributional data to re-evaluate the systematics of three passerine bird groups, the Mirafraassamica complex (bush-larks), the genus Seicercus ("spectacled-warblers"; with emphasis on the the S. burkii complex) and the genus Motacilla (wagtails). LÄS MER
2. 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
3. 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
4. Cooperation and conflict during reproduction in polyterritorial wood warblers (Phylloscopus sibilatrix)
Sammanfattning : In this thesis, the reproductive strategies of male and female wood warblers are studied. Males which arrived early to the breeding grounds had higher reproductive success than later males. This was due to early males more often mating polygynously than late males. LÄS MER
5. Polyterritorial behaviour and polygyny in the wood warbler (Phylloscopus sibilatrix - Bechst.)
Sammanfattning : .... LÄS MER