GROWTH AND MATURITY OF SALMON IN THE OCEAN 81 
Table 17. — Chinooks taken in wheels in the Columbia River near Warrendale, Oreg., July 16, 1919 
Females tabulated according to size of eggs, type of nucleus, and age 
Ocean nuclei 
Stream nuclei 
Logarithm of diameter of eggs (mid-value of class) 
Third 
year 
Fourth year 
Fifth year 
Fourth 
year 
Fifth 
year 
Sixth 
year 
Total 
0.55 — - 
1 
1 
2 
.57 
4 
1 
5 
.59- - - 
1 
2 
1 
4 
.61 -- 
1 
2 
1 
4 
.63 - 
2 
4 
6 
.65 
2 
2 
4 
.67 
4 
2 
1 
1 
1 
9 
.69 
1 
3 
2 
1 
7 
.71 - 
1 
4 
5 
Total — — 
2 
19 
18 
4 
2 
1 
46 
0.60 
0. 6247±0. 0072 
0. 6555±0. 0074 
0.66 
0.68 
0.67 
Standard deviation 
. 0466± . 0051 
.0466± .0052 
Table 18. — Chinooks taken by troll off the mouth of the Columbia River, July 28, 1919, collected 
at Ilwaco, Wash. Females only 
Tabulated according to size of eggs, type of nucleus, and age i 
Logarithm of diameter of eggs 
(mid- value of class) 
Ocean nuclei 
Stream nuclei 
Total 
Second 
year 
Third year 
Fourth year 
Fifth year 
Third 
year 
Fourth year 
1. 81 - 
1 
1 
1 
1 
1 
1 
1 
2 
2 
1 
3 
2 
2 
4 
2 
1 
1 
1 
.95* _ 
.97 
0. 03* __ 
1 
1 
2 
1 
2 
.05 .-- 
1 
.07 _ 
.09 ..^ -. 
.11 
1 
2 
2 
4 
2 
1 
.13- 
.15 
.17 
.19.... 
.21 
.25* 
1 
.51** 
1 
.53 
.55 
2 
3 
6 
6 
11 
6 
4 
4 
2 
4 
7 
9 
15 
11 
4 
6 
2 
4 
2 
2 
2 
. 57_ 
1 
. 69 
1 
3 
3 
3 
.61 
,63_ _ 
1 
1 
.65__ _ 
1 
.67._ 
.69 
2 
1 
2 
1 
1 
1 
.71 
1 
. 73 
2 
1 
1 
1 
. 75 
.77.... 
.79 
.81 
.83 
1 
1 
Total 
3 
1.91 
16 
Immature- 0. 1531 
Mature--. .6167 
49 
0. 6406±0. 0059 
18 
0. 6733±0. 0094 
7 
0. 0756 
3 
Immature- 0. 25 
Mature... .68 
96 
Mean 
Standard deviation 
. 0618± . 0042 
. 0594± . 0067 
1 Two specimens, one a 5-year fish with the stream type of nucleus and one a 6-year fish with the ocean tyjw of nucleus, are 
omitted from the table. The logarithm of the diameter of the eggs in the case of the 5-year fish was 0.61, and for the 6- year fish 
0.69. 
