Methodology and Methodological Approaches to Polar Bear (Ursus Maritimus) Dens Surveys on Wrangel and Herald Islands
The Wrangel and Herald Islands are the most important areas of the denning of breeding females of the Alaska-Chukotka polar bear (Ursus maritimus) subpopulation. Currently to estimate the number of maternal dens incomparable survey methods are often used, which do not allow estimating and comparing actual number of dens, which necessitates standardization of these methods. This article proposes methodological and organizational approaches to solving this problem.