^y//////////////////////////////////^^^^^ 



Fig. 6. Schematic diagram of a cell of the pelagic ecosystem of the Sea 

 of Japan: jQ--solar radiation; n--nutrient concentration; p-- 

 phytoplankton; b--bacterioplankton; d--detritus; f^--boreal herbivorous 



f3--interzonal 



epiplankton; f2--warm-water herbivorous epiplankton; 

 herbivorous zooplankton; Sp-carnivores of the boreal complex; so-- 

 carnivores of the warm-water complex; qi--fish; q2--squid; 6 — water 

 temperature; W--transport by currents; Y--catching of fish and squid, 



w'„, w"^--seasonal vertical 



oj^--active migrations of fish and squid; 

 migrations of interzonal plankton. 



2' 



into three groups of organisms: microplankton, mesoplankton I 

 (herbivores) and mesoplankton II (carnivores and omnivores). The 

 composition of the microplankton included phytoplankton (p) and 

 bacterioplankton (b). Mesoplankton I included boreal epiplankton f^, 

 warm-water epiplankton ^2. ^nd interzonal plankton f3. The seasonal 

 vertical migrations of interzonal herbivores were considered, and a 

 special element was distinguished--the wintering stock (f '3)--interzonal 

 zooplankton which spends the winter at depths greater than 200 m. It 

 was assumed that the wintering stock is not moved by the surface system 

 of currents. Two elements were distinguished among the mesoplanktonic 

 carnivores and omnivores: species of the boreal comples (sj^) and 

 species- of the warm-water complex (S2)- 



In contrast to the planktonic elements, passively transported from 

 cell to cell by currents, the elements of the nekton (fish--qi and 

 squidS'-qp) can move actively. For lack of a better hypothesis, it was 

 assumed that the fish and squids search out the maximum of food in the 

 cell in which they are located in neighboring cells. The rate of 



335 



