Contents: Introduction. The influence of ice conditions on the formation of reproductive ecotypes and spatial structure of seal populations. Multiyear changes of the numbers of associated with ice forms of seals. Morphological and ecological description of seal populations. Feeding of seals and their role in ecosystems. Role of seals in the formation of under-ice biocenoses. Conclusion. References. Indexes.
Includes many line drawings and 10 black & white photographs.
