Abstract:
The results of a study on changes in numbers and ways of living of sea birds are given. The study was carried out from aboard fishing trawlers in the Atlantic, in the region of Labrador and Newfoundland and that of north-western Africa, and in the North Sea. The study showed relationships of the changes in the numbers of birds with the geographical position, the presence of other trawlers in the fishery and the changes of weather. It was found that the sea bird species under study anticipate unfavourable weather conditions by migrating to other sea areas.