352 BULLETIN OF THE BUREAU OF FISHERIES 



Table 29. — Frequency distribution of Saginaw Bay herring according to length and age group — Con. 



• Tobico and Nayanquing samples combined. 

 " Gravelly Point herring 



' Au Gres herring 



* 1, 2, and 3 combined. 



In Table 29 the fish captured in each of the years 1921, 1922, 1923, and 1924 

 have been divided into age groups with those of each age group arranged according 

 to length. The average length of each age group, the total number of individuals 

 in each, and the percentage of that total in the whole number is shown for each year 

 at the bottom of the table. At the right is shown for each year the number of fish 

 of each size. The data on the total number of individuals of each age group in each 



