12 3 4 5 6 7 



9 10 12 3 



Age in years 



5 6 7 8 9 10 



Fig. 8. — The growth of C. ^ded, C. lavaretus and C.jj/tfec/jwninUddjaur-Storavanand Vojmsjon. 



Length mm 115 I20 125 130 135 140 145 150 155 I60 165 170 

 IOO%r-I 



% Ealing 

 Bosmina 



/o Eating 

 Eurycercus 

 Aselius 



Dytiscid larvae and 

 Chironomid larvae 



Age in years 





l007o 



Fig. 9. — C. lavaretus changing from Bosmina to other food when reaching a size of 

 140-155 mm, July 1954. 



