AS AN INDEX OF AGE. 



85 



Summarised Table 

 Showing Average surface size of Scales in the Poor Cod at various stages. 



Note. — The detailed table shows more clearly how 

 variable in size fishes of the same age may be. 



GADUS MINUTUS, THE POOR COD. 



Table from Cunninghams ^' Rate of Growth of some Sea Fishes" {Journal of 

 Marine Biological Association, 1891-2). 



The Whiting (Gadus merlangusj. 



According to Fulton, " the spawning season of the whiting extends 

 from the beginning of March to the end of June or beginning of July, 

 with its maximum about the end of April, and at the temperature of 

 the water at that time the eggs will take about ten or twelve days 

 to hatch." 



"The bulk of the larval whitings may thus be regarded as beginning 



