46 



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



The general picture of the quantitative distribution of zooplankton in the 

 Arctic basin is similar to that of benthos. According to V. Jashnov's work 

 (1940) high indices of plankton biomass are obtained only within the boun- 

 daries of the Barents Sea, while for the other Seas of the northern coasts of 

 Siberia the indices are much lower (Fig. 7). 



Fig. 7. Distribution of maxima of mean biomass of zooplankton of seas adjacent 

 to eastern sector of the Arctic basin in mg/m 3 (Jashnov, 1940). 



The qualitative and quantitative changes of plankton in the central part of 

 the Arctic basin are given in Tables 16 to 20. 



Table 16. Maximum values of mean plankton biomass for various areas of the Arctic 



basin (V. Jashnov), mg/m 3 



