were higher than in the north (34.9 and 6.6 g/m', respectively) 

 (Fig. 16). Total number and biomass of mesozooplankton in 

 the southern Chukchi Sea were small (Figs. 17,18) 

 and equaled 696,000 ind/m- and averaged 14.8 g/m-. 



Fig. 16. Levelsof total biomass (wet weight) of mesozooplankton in Chirikov 

 basin. 



Structure of Mesozooplankton Communities 



On the basis of data on mesozooplankton community 

 species composition, distribution of groups, and individual 

 species, as well as on overall quantitative indices of condition 

 of the mesozooplankton in epipelagic zones of the Bering Sea, 

 several regions were defined to describe the heterogeneous 

 characterofenvironmental conditions (Figs. 19,20). Analyzing 

 the structure of the mesozooplankton community inhabiting 



169 



