GROWTH AND MATURITY OF SALMON IN THE OCEAN 
83 
Table 20. — Chinook salmon taken in beach seines on the lower Columbia River collected at Astoria, 
Oreg., September 12, 1919 
Tabulated according to length, type of nucleus, age, and sex 
Ocean nuclei 
Stream nuclei 
Centimeter 
length (mid- 
value of class) 
Third year 
Fourth year 
Fifth year 
Fourth 
year 
Fifth year 
Sixth year 
Male 
Female 
Total 
Male 
Female 
Total 
Male 
Female 
Total 
Female 
Male 
Female 
Total 
Male 
Female 
Total 
Total 
57 
X 
61'.... 
1 
1 
1 
63 
1 
1 
1 
65 
3 
3 
3 
69* 
4 
4 
1 
1 
5 
71 
1 
1 
2 
2 
73 
3 
3 
3 
75 
1 
1 
4 
4 
5 
77 
4 
4 
4 
79 
1 
1 
2 
3 
.... 
4 
6 
81 
1 
1 
1 
3 
4 
5 
83 
1 
1 
2 
1 
3 
4 
85. __ 
2 
2 
2 
4 
6 
2 
2 
1 
11 
87 
1 
1 
2 
1 
1 
1 
4 
89 
1 
1 
1 
91 
1 
1 
1 
2 
"'3' 
3 
3 
95 
3 
2 
5 
2 
2 
1 
1 
8 
97 
1 
1 
1 
99 
2 
2 
2 
101. 
1 
2 
3 
2 
2 
5 
103 
2 
2 
1 
1 
1 
1 
2 
5 
105___ 
5 
6 
1 
1 
7 
109* 
2 
2 
2 
Ill - 
1 
1 
1 
113 
1 
1 
1 
115 
1 
1 
1 
117 
1 
1 
1 
Total 
14 
7 
21 
35 
21 
56 
2 
4 
6 
3 
1 
3 
4 
4 
1 
5 
95 
Mean 
70.29 
78.80 
73. 10±1. 31 
(') 
0) 
(') 
112.00 
93.00 
99.30 
87.7 
103. 00 
92.30 
95.00 
105. 00 
103.00 
104. 60 
Standard de- 
8. 94± . 93 
• The two types (small and large) of 4-year fish with ocean nuclei have been separated, as was done in Table 19. (See p. 53.) 
The means and standard deviations are as follows: (1) Fish less than 90 cm. in length — males (20 specimens), mean, 78.50=t0.66, 
standard deviation, 4.42±0.47; females (10 specimens), mean, 81.40; total (30 specimens), mean, 79..")3±0.56, standard deviation, 
4.55±0.41. (2) Fish greater than 90 cm. in length— males (15 specimens), mean, 102.76; females (11 specimens), mean, 97.37; 
total (26 specimens), mean, 100.46±0.78, standard deviation, 5.94±0.55. 
