746 



BIOLOGY OF THE SEAS OF THE U.S.S.R. 



of the Anadyr Bay in the lower Arctic sub-region of the Arctic region 

 (E. F. Gurjanova, 1935; A. P. Andriashev, 1939; L. Vinogradov, 1948) 

 (Figs. 366 and 367). 



N. Vinogradova (1949) characterizes Anadyr Bay and that part of the Bering 

 Sea adjacent to the Bering Strait with St Lawrence Island as its southern 

 boundary, as the low-Arctic region (the presence of ice in winter, near- 

 bottom temperature either below freezing point or just above). L. Vinogradov 

 (1948) includes the bathyal zone of the Bering, Okhotsk and Japan Seas in sub- 

 Arctic regions, and the northern part of the Sea of Okhotsk in the glacial 



Fig. 366. Zoogeographical regions of the Far Eastern Seas 

 (Vinogradov, 1948). 1 High Arctic; 2 Low Arctic; 3 Gla- 

 cial; 4 Sub-Arctic; 5 North-boreal; 6 South-boreal; 7 

 Sub-tropical regions. 



regions. A number of investigators recognize the peculiar biogeography of the 

 northern and northwestern parts of the Sea of Okhotsk, with their large 

 number of cold-water, Arctic and Arctic boreal species. Without including 

 these regions in the lower Arctic sub-region a number of investigators give 

 them special biogeographical names — co-arctic (K. Brodsky, 1952), glacial 

 (L. Vinogradov, 1948) and others. The Tartary Strait can to some extent be 

 included in those regions. This problem will be solved when a precise qualitative 

 method is laid down as the basis of the system of zonation, as has been done 

 for the southwestern part of the Barents Sea (Z. Filatova, 1938). 



T. Shchapova (1948) uses the geographical distribution of sea- weeds in her 

 division of the north-boreal Pacific sub-region into north-boreal (all the 

 northern part of the Bering Sea and of the Sea of Okhotsk) upper-temperate 

 boreal (southern part of the Bering Sea, Aleutian Islands, central and southern 

 parts of the Sea of Okhotsk and the northern part of the Sea of Japan) ; 



