TABLE 4 



and ih) structure of total biomass. 



2. In numbers and biomass of mesozooplankton. this 

 region can be characterized as medium-productive, with the 

 western section more productive than the east. The station 

 poorest in mesozooplankton was near Caroline Atoll. The 

 average numbers of mesozooplankton were maximum in the 

 0-50-m layer and decreased w ith depth. On the other hand, the 

 average biomass increased with depth owing to the increase in 

 the fraction of large-sized forms 



3. The structure o\' the mesozooplankton community as a 

 whole was characterized by the dominance of the fraction of 

 numbers and biomass of Calanoida and Cyclopoida. In the 

 majority of cases, half of the total consisted of Calanoida. In 

 the western portion of the section, the relative content of other 

 groups (Chaetognatha. Euphausiacea) increased, while the 

 fraction of Calanoida decreased. 



