46 BULLETIN OF THE BUREAU OF FISHERIES 
Table 10. — Composition of collections of fish taken outside the river as regards age groups 
Date 
Percentage with — 
Total percent- 
age with — 
Ocean nuclei in — 
Stream nuclei in- 
Ocean 
nuclei 
Stream 
nuclei 
Second 
year 
Third 
year 
Fourth 
year 
Fifth 
year 
Sixth 
year 
Second 
year 
Third 
year 
Fourth 
year 
Fifth 
year 
Sbth 
year 
May 8 to 10 
13.2 
56.2 
42.4 
43.3 
47.5 
25.0 
22.4 
9. 1 
31.4 
16.4 
15.8 
24.5 
46.7 
7.8 
26.8 
20.0 
3.3 
8.3 
29.8 
27.3 
23.3 
50.0 
69.5 
19.6 
0.4 
13.6 
19.1 
1.5 
11.5 
1. 1 
5.8 
0.7 
77.6 
82.7 
86.7 
75.9 
75.0 
70.2 
63.8 
79.9 
88.9 
91.6 
67.7 
76.7 
22.4 
17.3 
13.3 
24.1 
25.0 
29.8 
38.2 
20.1 
ILl 
8.4 
32.3 
23.3 
May 18 
May 24 _ 
23.3 
24.2 
41.7 
14. 9 
27.3 
14. 1 
3.0 
2.1 
4.9 
23.3 
13.3 
18.3 
25.0 
17.9 
18.1 
7.0 
7.1 
1.0 
1.9 
10.0 
June 4 
.8 
0.8 
3.3 
; 1-7 
June 10 - 
June 21 
3.0 
10.4 
18.1 
10.1 
3.0 
7.4 
2.9 
10.0 
1.5 
June 25 
July 2 
11.1 
18.5 
4.2 
18.6 
3.0 
1.0 
July 28 
1.0 
Aug. 13 
Aug. 13 to 17 
26.5 
3.3 
1.0 
Sept. 18 and 19 
6.7 
Average 
16.00 
31.80 
23.80 
5. 85 
.64 
.07 
11.55 
6.52 
3. 66 
.14 
78.0 
22.0 
O 20 eo 0O /OO '^O /fO /60 
Fig. 13. — Percentages of fish with stream and ocean nuclei taken outside 
One of the most notable differences between the collections of fish taken in 
the ocean and those of fish taken in the river is the fact just mentioned, that in 
the former there is no such decided and consistent change in the percentage of fish 
with ocean and with stream nuclei as has been described for the collections of fish 
taken inside. The percentage of fish with ocean nuclei taken outside varies from. 
63.8 to 91.6, averaging 78 per cent, and of fish with stream nuclei from 8.4 to 36.2, 
averaging 22 per cent. These figures are somewhat different from those given by 
Fraser (1920) for the chinook salmon taken during 1915 and 1916 in the Straits of 
Georgia, near Vancouver Island, British Columbia. Fraser found 34.6 per cent of 
