Jc. Salvig et al., SURVEYS OF HUMAN ACTIVITIES AND THEIR EFFECTS ON NUMBERS AND DISTRIBUTIONS OF WATERFOWL IN THE DANISH WADDEN SEA, Ophelia, 1994, pp. 333-337
The Danish Wadden Sea provides an important area for human activities,
both recreational and exploitational. An overview of the different hu
man activities and their impact on numbers and distributions of waterf
owl are given based upon eleven years of aerial surveys during the per
iod from 1980 to 1991.