172 



THE ROYAL SOCIETY OF CANADA 



All the fish from which these scales were taken were caught in 

 the strait of Georgia, not far from Nanaimo or in the lower portion of 

 the Fraser river, and probably many of them had never been farther 

 away from the mouths of the rivers down which they migrated than 

 the confines of the strait. Of the 1412 examined, 924 or 65.4% were 

 of the sea type and 488 or 34.6% of the stream type. 



Of the 924 sea run fish, 11 (1-2%) were in the 5th year, 257 

 (27 • 8%) in the 4th year, 396 (42 • 9%^) in the 3rd year and 260 (28 • 1%) 

 in the 2nd year. The average length of the 5-year-olds was 34-3 

 inches, of the 4-year-olds, 29-0, of the 3-year-olds, 24-7, and the 2- 

 year-olds, 18-3. Since these were collected at various times from 

 July 8 to October 19, the earlier fish at least would not have nearly 

 completed the growth for the year. The figures may be put in tabular 

 form thus: 



Sea Type 



In calculating the growth for each year, the same method was 

 used as in former calculations, 1 • 5 inches being taken as the average 

 length of the fry when the first ring around the nucleus is formed. 

 From these calculations the following averages were obtained : 



/ Table of Growth 



Sea Type 



