114 
BULLETIN OF THE BUREAU OF FISHERIES 
Table 44.- — Frequency distribution of the calculated lengths at the end of each year of life, as determined 
from the scales of cod caught on Nantucket Shoals during the summer of 1923 
Length in inches 
Complete years of growth 
Length in inches 
Complete years of growth 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
3 
5 
25 
20 
103 
11 
1 
4... 
34 
26 
4 
72 
17 
5. 
104 
27 
2 
49 
26 
6 
131 
28 
21 
22 
3 
7 
147 
29 
9 
11 
3 
1 
8... 
74 
1 
30 
4 
13 
7 
9 
40 
2 
31 
8 
3 
1 
10. . 
30 
8 
32 
2 
8 
1 
11 
7 
30 
33 
8 
3 
12 
1 
39 
34 
3 
2 
1 
13.. . 
70 
35 
2 
1 
14. 
76 
1 
36 
3 
1 
15.. 
94 
4 
37 
2 
16. 
85 
18 
38 
1 
2 
17. 
80 
28 
1 
39 
1 
18. 
49 
48 
1 
40 
1 
19. 
23 
57 
1 
41 
1 
20 
10 
82 
5 
21. 
5 
94 
17 
1 
Total . . 
573 
573 
557 
450 
113 
36 
13 
6 
4 
1 
22 
no 
29 
23. 
51 
58 
Average length... 
6.7 
15. 1 
20.8 
24.8 
27.7 
31.1 
33.6 
36. 1 
38.7 
41.0 
24 
38 
80 
2 
These calculated sizes for each year of life may be subject to a small correction 
because body and scale growth are not in exact proportion. But that they are approxi- 
mately correct is indicated by their close agreement with the ages with respect to a 
known size, of the samples of fish listed in the table and graph which follow: 
Table 45 .—-Age of cod as determined from the scales 
Length in 
inches 
Summer-caught cod, by age and size 
South Channel, June, 1929 
Nantucket Shoals, May to Septem- 
ber, 1923 
3H 
4H 
hYi 
6H 
7H 
2 H 
3H 
4H 
5h 
6H 
m 
m 
2H 
3H 
4M 
7H 
1 
1 
2 
2 
1 
1 
2 
1 
3 
17 
1 
5 
1 
2 
32 
2 
8 
2 
70 
1 
2 
10 
8 
69 
7 
3 
14 
17 
56 
21 
1 
2 
9 
37 
21 
22 
1 
6 
41 
5 
1 
8 
26 
2 
i 
4 
40 
7 
1 
26 
12 
3 
30 
9 
4 
18 
16 
1 
4. 
16 
9 
3 
15 
24 
4 
2 
10 
4 
2 
13 
29 
4 
1 
1 
1 
1 
5 
1 
1 
22 
1 
1 
2 
2 
9 
7 
1 
1 
1 
2 
4 
10 
6 
1 
2 
2 
2 
7 
2 
1 
2 
2 
3 
2 
1 
1 
1 
1 
Total. .. 
6 
9 
15 
3 
2 
3 
55 
203 
43 
26 
6 
1 
4 
274 
150 
126 
30 
9 
v. length.. 
21.0 
25.6 
28.6 
33.0 
33.0 
20.3 
24.4 
27.4 
29.8 
32.5 
36.3 
16.0 
20.5 
23.8 
27.4 
30.8 
33.3 
36.4 
Nantucket Shoals, July, 1924 
12 , 
14. 
15 . 
10 . 
17. 
18. 
19. 
20 . 
21 . 
22 . 
23. 
24. 
25. 
26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
34. 
35. 
36. 
37. 
38. 
40. 
41 . 
