Eider (Somateria mollissima) Science Article 2
Based on data compiled from the official Danish Bag Record and from the annual wing surveys of waterfowl, analyses of long-term trends in the bag of common eiders Somateria mollissimawere performed for the period 1958-2000, while more detailed analyses of factors affecting bag size were made for the period 1980-1999. The bag size increased from ca 100,000 in the late 1950s to ca 140,000 in the 1970s and 1980s. During the 1990s, the bag size decreased to ca 83,000 in parallel with a decrease in the number of eiders wintering in Danish waters and in parallel with a significant decrease in the number of eider hunters. Assessed from both national and regional developments in bag size, hunter numbers and numbers of eiders bagged per hunter during 1980-1999, there were no indications that bag size was related to the number of wintering eiders.
Christensen, T.K. 2005, Wildl. Biol. 11:2 (2005)