!{I0 



SO 





•i/\ 



ka. 





J 



ISJo/o 



■.b '■:• 



5 



Fig. 20. Importance of various food sources in the formation of the diet 

 of some common species of mesoplankton in the area of the equatorial 

 divergence in the Pacific Ocean: R - daily ration (% of body weight); b - 

 bacterioplankton; P - phytoplankton; Ci - ciliates; a - animal food 

 (mixture of small calanoids); 1 - Clausocalanus sp.; 2 - Paracalanus 

 parvus ; 3 - Undinula darwini ; 4 - Eucalanus attenuatus ; 5 - Acartia clausi ; 

 (Petipa et al . , 1975). 



Biomrss of bacteria, mg/m^ 

 /^"S 27i; SS<? 



-"■f OJ f.2 /.5 /,s 



Total number of bacteria (lO^/m.?.) 



Fig. 21. Variation of intensity of nutrition (R, %) of some mass species 

 of marine invertebrates with bacterioplankton as a function of its 

 concentration: 1 - the sponge Toxadocea ; 2 - the veligers Vermetidae; 3 • 

 the polychaete Megalomma ; 4 - the coral Pocillopora ; 5 - the oyster 

 Crassostrea ; 6 - the copepoda Eucalanus. 



280 



