GROWTH RATE IN PACIFIC SALMON 



21 



All of these humpbacks were of the sea type in their second year. The sex per- 

 centage shows a wide divergence. Only those from the Fraser river were appf.)xi- 

 mately equal in numbers. At Deepwater bay the males were almost twice as numer- 

 ous as the females and off Pender island the females were nearly three times as 

 numerous as the males. The Deepwater bay fish were the first of the season but the 

 others were caught well in mid season. 



Sex Distribution. 



Length— FREQUENCY 

 Length 13 13-5 14 14-5 15 15-5 16 16-5 17 17-5 18 18-5 19 19-5 



Deepwater bay — Male 1 . 



Female, 



Fraser river — Male 



Female 



Pender island— Male 



Female 



1 



13 11 



Deepwater bay — Male 12 8 13 5 



Female 6 3 12 16 



Fraser river— Male 7 10 13 24 11 



Female \ 10 15 30 27 14 



Penber island— Male 9 16 25 23 22 



Female 21 54 108 88 65 



Deepwater bay, average length: male, 20-3; female, 19-9; total, 20-2. 

 Fraser river, average length, male, 21-9; female, 21-2; total, 21-5. 

 Pender island, average length: male, 21-6; female, 21-3; total, 21-4. 



Length 20 20-5 21 21-5 22 22-5 23 23-5 24 24-5 25 25? 



The average length of the male is greater in each iuptance than that of the 

 female. 



The average growth for each year is as follows : — 



Deepwater bay, Ist year, 11-7; 2nd year, 8-4. 

 Fraser river, 1st year, 12-2; 2nd year, 9-3. 

 Pender island, 1st year, 12-1; 2nd year, 9-3. 



Length — Weight Ratio. 



Length 13 16 16-5 17 17-5 18 18-5 19 



Deepwater buv— Male. 1-5 20 2-5 30 3-2 3-4 3-7 40 



Female 2-5 30 3-3 3-6 3-9 



Fraser river — Male 3-5 



Female ' 4-0 4-5 



Pender island — Male .• 3-5 



Female 4-3 



Length 22 22-5 23 



Deepwater bav — Male 6-5 6-9 7-6 



Female 6-1 6-5 6-7 



Fraser river— Male • 5-7 6-0 6-5 



Female 5-5 5-9 6-3 



Pender island— Male 5-8 6-2 6-4 



Female 5-8 6-2 6-4 



19-5 

 4-4 

 4-3 

 4-2 

 4-4 

 4-6 

 4-6 



23-5 



7-7 



6-8 

 6-7 



20 



4-6 



4-8 



4-4 



4-7 



4-9 



4-9 



20-5 

 5-3 

 4-9 

 4-9 

 4-9 

 5-0 

 5-0 



24 24-5 

 8-3 8-6 



7-3 7-8 

 7-5 8-0 



21 



5-6 



5-3 



51 



51 



5-3 



5-8 



21-5 

 5-9 

 5-7 

 5-3 

 5-3 

 5-5 

 5-6 



25 25-5 



8-5 8-7 

 8-0 



In comparing the humpbacks from the three localities it can be observed at once 

 that those from near Pender island correspond almost exactly with those from the 

 Fraser river, while those from Deepwater bay differ materially from these in total 

 length as well as in the growth in each year. In each case the range of length is 

 much greater in the males than in the females, most noticably so in the case of the 

 Deepwater bay fish, where the male range extends both below and above the female 



