36 
BULLETIN OF THE BUREAU OF FISHERIES 
The segregation of recaptures given in Tables 18 and 19 indicate that a fair 
proportion of the cod living on Nantucket Shoals emigrated to the Chatham-South 
Channel region during the spring and summer of the years 1923, 1924, and 1925, and 
that relatively few went there during the three years which followed. The contrast 
in the magnitude of this emigration during each of the 3-year periods is brought out 
in Table 20, which consolidates the Chatham and the South Channel recaptures. 
Table 20. — The number of tagged Nantucket Shoals cod reported from the Chatham South Channel 
region during each year from 1923 to 1928 
The United States Bureau of Fisheries has collected statistics 10 of the catch of 
cod taken each month on the Chatham grounds and South Channel so that there is 
opportunity to make a direct comparison between the total number of fish taken and 
the number of tagged fish recaptured. These records are listed in Tables 21 and 22. 
Table 21.- — The reported number of Nantucket Shoals tagged cod taken on the Chatham grounds, from 
1923 to 1928 by fishing vessels operating out of Boston, Gloucester, and Portland, together with the 
catch of cod for each month 
Number of cod taken by the New England fleet and, in parentheses, the catch of 
Nantucket Shoals tagged cod 
Month 
1923 
1924 
1925 
1926 
1927 
1928 
January 
(») 
3, 188 
4, 077 
1,855 
3, 558 
40 
February 
» 624 
3, 752 
2,522 
7, 052 
1,042 
3, 799 
March 
« 3, 565 
2,336 (1) 
9, 149 
1, 643 
1,856 
1,054 
April 
11, 532 
3,606 
2, 069 
6, 956 
1, 037 
6, 498 
May 
26, 347 
4, 073 
2, 169 
6,243 (1) 
1,619 
2, 347 
June 
6, 707 (3) 
159 (2) 
2, 810 (2) 
1, 148 
0 (1) 
1, 045 
July 
158 (2) 
2 , 249 
1, 763 
164 (1) 
130 (1) 
0 (5) 
1,008 (10) 
7,317 (23) 
' 780 (1) 
September 
0 (1) 
161 
'969 (4) 
1, 115 
13 
2, 534 
0 (1) 
1, 170 (1) 
564 
106 
7 
2, 127 
707 (1) 
1, 365 
294 
228 
December __ 
293 
1, 834 
1, 774 (1) 
377 
300 
171 
Total 
51,353 (12) 
21,287 (14) 
36,376 (31) 
30, 403 (2) 
10, 490 " (2) 
17,846 (1) 
“ The first cod of this investigation were marked in April, 1923, so that statistics prior to then can have no relation to the tag 
returns. 
10 The original statistics give the catch of cod in pounds, and the number of fish is estimated here on a basis of 1 fish for each 
10 pounds of catch. 
