182 



THE ROYAL SOCIETY OF CANADA 



6-0 J.Ô r-ô 9-0 



Fig. 7. — Sockeye. 2nd year growth. 



/Û-0 



The Rivers inlet collection does not call for much comment in 

 this regard. Gilbert has come across specimens of other types besides 

 the one year stream type, but they have been so scarce that they have 

 not materially affected the results. The percentage of 5-year and 4- 

 year fish apparently vary from year to year, but only in 1913, which 

 must have been an unusual year, were the 4-year fish in the majority. 

 The percentages given above are therefore not unusual. 



The different types in the Fraser river collection are those that 

 have been found in other years. There is a higher percentage of those 

 of the sea type, but as the percentage is still low and the number is 

 small it does not represent a much greater number of individuals. 



The stream type that has spent over one year in fresh water 

 predominates largely but not so exclusively as in Rivers inlet, but in 

 this type the 4-year fish are much in the majority, not the 5-year fish as 

 in Rivers inlet. Of those that spent over two years in fresh water 

 almost all are 5-year fish. These, like the 4-year fish of the one year 

 stream type, have spent two winters and three summers in the sea. 

 Of the fish of the sea type the majority were in the fourth year, but a 

 greater variation is shown than in the other two types, as there were 



