[fraser] 



PACIFIC SALMON 



173 



In thiis table the uncompleted year is not included in any case, as 

 the average could not be compared with the full year's growth in the 

 other year classes. They m.ay be given here to show the difference. 

 The average growth in the incomplete year of the 2nd year class was 

 7-1, of the 3rd year, 4-8, of the 4th year, 3-7 and of the 5th year 2-5. 

 At the same time they show that the great portion of the growth of 

 the year takes place before July, as was shown in a previous paper. 



The growth for any year of life differs but slightly in the different 

 year classes although the fourth year class is rather low throughout. 

 The average taken for a year of life applies to a different number in 

 each year, e.g., in the 1st year the average is taken for the whole 924, 

 for the 2nd year for only 664, the number of the 2nd year class not 

 being included, reductions taking place similarly in the other cases. 



Looking at the frequency curves, it will be seen that with the 

 exception of a few of abnormal growth, the range of growth of the 

 first year extends from 8-2 inches to 13-0. The second year growth 

 varies from 7-3 to 11-2, and the length at the end of the second year, 

 from 16-7 to 22-7. The growth in the third year ranges from 5-3 to 



é-Û 70 ^0 Ç.Û 



Fig. 3. — Spring — sea type. 3rd year growth. 



