SEA-FISHERIES LABORATORY. 



119 



the months January to April, and then begins to increase 

 towards a maximum — about 24" 5 cms. — in July. This 



March 



Februa 



January 



Fig. 13. Percentages of plaice at and above each centimetre of length 

 caught in Barrow Channel during January- April, 1909. 

 The construction is explained in the text. 



increase in modal length is due simply to the growth of 

 the fish which have migrated into the Channel, and 



