No. 



Factors 



O r— 



- + 



- + - 



- + + 

 + - - 

 + - + 

 + + - 

 + + + 



Hydroid, 

 mg/44 cm2 



Tenellia Vorticella , 

 indiv. indiv./cm^ 



2M '/OH em $ffo mo .'20 



Sff Wff 



/Off 200 JOO VOOs 



S /a !S 20 ff 



Balanus , 

 base diam. , 

 mm 



Fig. 7. 

 Balanus 



Change in abundance of hydroid, Tenellia , Vorticella and 



in various versions of a full factor experiment FFE-2-^. Number 



of individual infusoria (a) and colonies (b) counted for Vorticella. 



Fig. 8. Relation of specific growth 

 rate of Balanus to specific growth 

 rate of hydroid. 



a/ o.z 



C^f Hydroid 



0.^ 



per individual mollusk. The variations of this quantity were found to 

 be slight: In version 7, each mollusk corresponded to about 6.5 mg of 

 hydroid, in version 8--about 3 mg. However, the specific growth rate of 

 the hydroid in version 7 was only 15% less than the control, while in 

 version 8 it was almost 70% slower, and the relative intensity of 

 connections 8 and 5 differed by a factor of 16 (-0.61 and -10.02). 



196 



