GENERAL BIOLOGY 



761 



fish-stock. Fig. 555 represents an analysis of the age-composi- 

 tion of a catch of saithe ; it is of course not representative of 



HS 



50 



65 



6C 



5S 60 



Fig. 555. 

 Age distribution of the saithe [Gadus virens) from an examination by Damas of the scales of 654 

 fishes caught in Sondmor (Norway) in July 1907. The age-groups that were poorly repre- 

 sented have been left out. 



12 I 2 3 4-5 



7 8 9 10 



12 



3/^5 



the 

 the 



Fig. 556. 



° Percentage of fat in sprats caught off the Norwegian west coast in different months. 



K Average temperature of the surface of the sea, off Bergen, in each month of the year. 



(From Sund. ) 



saithe-stock, but might perhaps have been so in regard to 

 special shoal of saithe from which it was taken. 



