[fraser] 



PACIFIC SALMON 



189 



24-0. In this case the 4-year fish were somewhat larger throughout 

 than the 5-year fish of the previous year when measured at the same 

 period of growth. 



The average length of the males in both 4 and 5-year classes is 

 in excess of that of the females. 



Fraser River Sockeye, 1 Year Stream 



Before going on with the other types of Fraser river sockeye, it 

 will be well to compare the growth of the 1-year stream type with the 

 Rivers inlet sockeye, since all of these examined were of this type. 

 It must be remembered that this comparison applies only to the sam- 

 ple specimens of this species caught in 1916. Some of the points may 

 apply quite definitely in other years, but it must not be taken for 

 granted that they do so without further analysis of data necessary 

 for making comparison in the year in question. 



The difference is marked even in the first year. The average 

 length of the Rivers inlet fish at the beginning of rapid growth in the 

 second spring was but 2 • 5 inches, while that of the Fraser river fish 

 was 2-9, i.e., the Fraser river fish average 16 per cent greater length 

 than the Rivers inlet fish. The difference in size of the scale cor- 



