The effect of predator control and climate on common eider populations in Svalbard

Both down harvesting and climate can affect the populations of the common eider. Down harvesting is managed with so-called predator control. This means protecting the eiders while incubating the eggs, against the egg predators. With two time series covering 30 years, we investigate this topic. tha data comes from Kongsfjorden (bird reserve) and Eholmen in Bellsund (where down is harvested and managed with predator control. Specifically, the project investigates how predator control and climatic factors affect population trends and dynamics of common eider.
The project will provide new insight in the factors affecting common eider population dynamic, both in colonies with down harvesting and in bird reserves. Thus, it is relevant for developing managment strategies in Svalbard.