Sökning: "predatory birds"
Hittade 5 avhandlingar innehållade orden predatory birds.
1. Eggshell thickness and levels of DDT, PCB and mercury in eggs of osprey [Pandion haliaetus (L.)] and marsh harrier [Circus aeruginosus (L.)] in relation to their breeding success and population status in Sweden
Sammanfattning : .... LÄS MER
2. 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
3. Behavioural differences and genetic relationships between four captive populations of red junglefowl (Gallus gallus) : possible implications for conservation
Sammanfattning : Conservation of species is to a large extent carried out by zoos where animals are kept in small populations under protected conditions. The ultimate goal of such ex situ conservation programs is to eventually reintroduce the animals into natural habitats to provide support for the survival of the species. LÄS MER
4. Seasonal partial migration of cyprinids - Causes and consequences
Sammanfattning : Partial migration is a common phenomenon in animals but has mostly been studied in birds. However, partial migration of cyprinid fish from lakes into streams during winter is a wide-spread phenomenon. LÄS MER
5. Baltic shore-lands facing climate change
Sammanfattning : This thesis provides new insight concerning drivers behind differences in arthropod diversity and abundance in Baltic shore ecosystems and how the arthropod communities might be affected when the conditions in the Baltic Sea are altered due to climate change. The focus has been on climate related changes that are unique for coastal ecosystems, especially sea level rise and changes in the inflow of marine nutrients. LÄS MER