82 
BULLETIN OF THE BUKEAU OF FISHERIES 
Table 19. — Chinook salmon taken by seines on the lower Columbia River, collected at Astoria, Oreg., 
August 22, 1919 
Tabulated according to lengtti, type of nucleus, age and sex ' 
Ocean nuclei 
Stream nuclei 
Centimeter length 
(mid-value of 
class) 
year 
Third year 
Fourth year 
Fifth 
year 
Fourth year 
Fifth 
year 
Total 
Male 
Male 
Female 
Total 
Male 
Female 
Total 
Female 
Male 
Female 
Total 
Female 
49 
1 
1 
63*... 
\ 
1 
66*... 
1 
1 
1 
67. 
1 
1 
1 
69 . 
2 
2 
1 
1 
3 
71.. . 
1 
1 
1 
73 
2 
2 
1 
1 
3 
76 . 
1 
1 
4 
4 
1 
1 
6 
"77 
1 
1 
2 
4 
4 
6 
79 
1 
1 
2 
3 
5 
1 
1 
7 
81 
1 
1 
2 
4 
6 
7 
83 
1 
1 
2 
1 
1 
2 
4 
85 
1 
1 
1 
3 
4 
5 
87 
3 
3 
1 
1 
1 
2 
2 
7 
89 
1 
1 
1 
1 
1 
1 
4 
91 
3 
3 
2 
1 
3 
6 
93 
1 
1 
1 
95 
3 
3 
1 
4 
97 
2 
3 
5 
5 
99 
2 
2 
4 
4 
101 
3 
4 
7 
7 
103 
4 
4 
4 
105 
1 
1 
1 
107 
2 
2 
2 
109 
2 
2 
2 
Total. 
1 
13 
8 
21 
37 
25 
62 
3 
2 
3 
5 
1 
93 
Mean 
49.0 
77.30 
82.50 
79. 28±1.42 
(^) 
90.33 
77.00 
87.67 
83. 60 
89.00 
Standard de- 
viation 
9. 66±1. 00 
1 In addition to the specimens tabulated above there was 1 female 103 cm. long, in its sixth year, stream nucleus. 
2 The apparent bimodality of the distributions of the 4- year fish has been discussed on page 53. The various averages and 
standard deviations are as follows: (1) Fish less than 90 cm. in length — males (19 specimens), mean, 77.00d=0.77, standard devia- 
tion, 4.98±0.55; females (11 specimens), mean, 81.73; total (30 sepcimens), mean, 78.74±0.59, standard deviation, 4.78±0.43. 
(2) Fish greater than 90 cm. in length— males (18 specimens), mean, 101.44±0.81; standard deviation, 6.10±0.57; females (14 
specimens), mean, 97.30; total (32 specimens), mean, 99.62±0.57, standard deviation, 4.80±0.41. 
