178 THE ROYAL SOCIETY OF CANADA 



In the fish of the sea type, the first year growth of the 2-year 

 class is higher than in the preceding year and in consequence, since 

 there was quite a large number of these, the whole average is slightly 

 higher, although the growth in the other year classes is slightly lower. 

 The growth in all the other year classes is lower in the 1916 fish. The 

 higher averages in 1915 were at least partly due to the fish from Bark- 

 ley sound and other outside points as the fish from the open sea, or 

 the approaches from the open sea, are larger than those in the strait 

 of Georgia. An illustration of this will be given later. 



The range of length at the end of the first year is much the same 

 in each year and so with the second year, but as the age increases the 

 higher range for the 1915 fish is noticeable as well as the greater range, 

 the lower part of the range being made up of those from the same 

 locality and the higher part from the outside points. In the fish of 

 the stream type, much the same thing holds true. There is similarity 

 of growth in the first and second year growth of the different year 

 classes in the two cases, but in the third and fourth years the averages 

 as well as the range are higher in the 1915 fish. 



There is nothing in the present collection to indicate that the four- 

 year fish that spawn are any larger than those belonging to the same 

 year class that remain in the sea for another year, although that 

 seemed to be indicated by the results obtained in the preceding year. 



Besides the 1412 spring salmon from the strait of Georgia, a small 

 number was obtained from other sources, and as they agree in showing 

 a more rapid growth than the average of those from the strait of 

 Georgia they may be considered together as the number from any one 

 locality was not great enough to make it worth while considering 

 separately. Of the 20 thus obtained, 7 were from Campbell river, 2 

 from Rivers inlet and 11 from Claxton on the Skeena river. 11 of 

 these were of the sea type and 9 of the stream type. Of the sea type, 

 7 were in the 5th year, 3 in the 4th and 1 in the 3rd. Of the stream 

 type, 7 were in the 5th year and 2 in the 3rd. The average length of 

 the sea type 5-year fish was 38-6 inches, of the 4-year fish, 29-2 and 

 the 3-year fish, 25*5. Of the stream type, the 5-year average was 

 35*9 and the 3-year, 20 '8. In the sea type fish the average growth 

 was: first year, 11-0; second year, 10-2; third year, 7*8, fourth year, 

 5*9 and fifth year, when caught, 2-3. In the stream type: first year, 

 3 • 5 ; second year, 11-7; third year, 9 • 4 ; fourth year, 7 • 9 and the por- 

 tion of the fifth year, 3-5. In comparing these figures with those 

 from the strait of Georgia it is easy to see that it would not take very 

 many of them to make a noticeably higher average for each year's 

 growth. 



