188 



THE ROYAL SOCIETY OF CANADA 



The measurements here are lower than Gilbert's, as the median 

 caudal fin rays are included in his measurements, but are not in these. 



Turning now to the Fraser river sockeye, since the great majority 

 were of the stream type that remained over one year in fresh water, 

 they may well be considered first as with them the comparison direct 

 may be made with the Rivers inlet fish. The first year growth ranges 

 from 2-3 to 3-4 inches and is the same average for the 4-year and the 

 5-year fish. The second year's growth varies from 6-2 inches to 10-6, 

 with an average of 8-6 for the 4-year fish and 8-3 for the 5-year fish, 

 or 8-5 for all. The range of the third year's growth extends from 5-6 

 to 9 • 8, with an average of 7 • 7 for the 4-year fish and 7 • 3 for the 5-year 

 or 7-6 for all. For the fourth year growth in the 5-year class the 

 variation runs from 2 • 8 to 5 • 7, with an average of 4 • 1, while the growth 

 for the portion of the fourth year of the 4-year fish is 3-1. The aver- 

 age growth of the 5-year fish in the last spring and summer is 1-4 

 inches. 



The length at the end of the second year ranges from 8-4 to 13-6; 

 at the end of the third year from 15-9 to 21-6, but mainly from 17-2 

 to 21-4; at the end of the fourth year of the 5-year fish from 21-0 to 

 24-9, with the average length 22-6, while the total length of the 4- 

 year fish was 22-3. The average total length of the 5-year fish was 



Fig. 10. — Sockeye. Length at 2 years. 



