64 BULLETIN OF THE BUREAU OF FISHERIES 
Table 13. — Number oj specimens and average length of salmon of each age group taken at Monterey 
June 16, 1915 
June 19 to 21, 
1918 
June 16, 1915 
June 19 to 21, 
1918 
Num- 
ber 
Average 
1 ength , 
centi- 
meters 
Num- 
ber 
Average 
length, 
centi- 
meters 
Num- 
ber 
Average 
length, 
centi- 
meters 
Num- 
ber 
Average 
length, 
centi- 
meters 
Ocean nuclei: 
Second year 
30 
28 
25 
14 
53. 27 
76. 07 
87. 72 
96. 60 
2 
51 
6 
47.00 
72. 64 
91. 30 
Stream nuclei : 
Third year 
1 
6 
2 
59.00 
81.33 
93.00 
1 
3 
57.00 
80.30 
Third year 
Fourth year 
Tourth year 
Fifth year _ 
Fifth year 
A comparison shows that these figures are, in the main, in fair agreement with 
the data from the Colxunbia River. A slight tendency is apparent, especially 
among the fish of the younger age groups, for the fish taken at Monterey to run larger 
than did the Columbia River fish in 1919, but many more data than are at present 
available will be necessary before this can be asserted with any certainty. 
PERCENTAGES OF THE VARIOUS AGE GROUPS 
The collection made in 1915 can not be considered as showing the proper per- 
centages of fish of the various age groups. It was taken at a time when the fish 
were so segregated at the cannery that a random sampling was impossible. Individ- 
uals were sorted into three lots, according to size. One contained fish less than 5 
pounds in weight, which was, at the time, the legal limit below which the fish could 
not be sold. Many fish of this size were taken by the fishermen and were brought 
to the canneries, only to be discarded. The second group contained fish between 
5 and 15 pounds in weight, and the third group those above 15 pounds. In collect- 
ing these data it was necessary to handle the various sizes separately, and it was, 
therefore, impossible to get a fair sample of the take as a whole. The collection 
made in 1918 contains practically all of the females that were brought to one of the 
large canneries and to several of the smaller fish dealers during the period of three 
days in which the collection was made. It therefore represents a fair random sample 
of the take at that time. The percentages of fish of the different age groups are 
given in Table 14. The table also gives the percentages of fish of the different age 
groups as found by Mr. McGregor of the California Fish and Game Commission. 
His collection contained over 200 specimens taken between June 4 and June 22, 
1921. 
Table 14. — Percentages of fish of different age groups in Monterey Bay 
Date 
Age group 
Ocean nuclei 
Stream nuclei 
Second 
year 
Third 
year 
Fourth 
year 
Fifth 
year 
Sixth 
year 
Third 
year 
Fourth 
year 
Fifth 
year 
June 19 to 21, 1918 
3. 2 
1.9 
8L0 
70.8 
9.5 
13.6 
1. 6 
1.9 
4. 7 
3.3 
June 4 to 22, 1921 _ _. 
6. 6 
0. 5 
1.4 
