46 
BULLETIN OF THE BUREAU OF FISHERIES 
we tagged 168 cod and on July 14, 226 cod. Returning there on September 14, 1925, 
the Halcyon recaptured 9 of the cod tagged on July 14, but none of those tagged on the 
13th. Although fishing was done off Petit Manan most of the day on September 14, 
8 of the recaptured tagged fish were taken within the space of 22 minutes and the 
ninth was taken about an hour later, as follows: 1, 1.10, 1.15, 1.17, 1.17, 1.20, 1.21, 
1.22, and 2.15 p. m. 
The tag-number sequence of recaptures points to the localization of the cod per- 
haps even better than do the time sequences, for if cod of nearly consecutive tag 
numbers are recaptured months later, on the same date and in the same place, we can 
be reasonably certain that such fish belonged to a school which held together during 
the interim. 
Table 26. — Records of Nantucket Shoals cod of nearly consecutive tag numbers which were recaptured 
on the same or nearly the same day in the same locality where they were tagged 
Tagged at Round 
Shoal buoy 
Recaptured at or 
near Round 
Shoal buoy 
Tag numbers 
Tagged at Round 
Shoal buoy 
Recaptured at or 
near Round 
Shoal buoy 
Tag numbers 
Tune 24, 1923 
June 28, 1923 
Do 
Do 
Do 
Aug. 17, 1923 
Aug. 18, 1923 
Oct. 15, 1923 
Oct. 6, 1923. 
Oct. 3, 1923 
Oct. 4, 1923 
Oct. 15, 1923 
Oct. 24, 1923 
Sept. 3, 1923 
Sept. 17, 1923.... 
July 13-16, 1924.. 
10708, 10768. 
231, 309, 336. 
277, 303. 
248, 231, 283, 375. 
232, 272. 
558, 627. 
916, 917, 919. 
486, 491. 
May 4, 1927 
May 6, 1927 
Do. 
Do.. 
Do 
June 18, 1927 
Sept. 3, 1927 
June 17-27, 1927- 
Sept. 1-3, 1927... 
Oct. 8, 1927 
Nov. 16-19, 1927. 
Sept. 1-2, 1927... 
47472, 47499. 
47778, 47977, 48053, 48075, 
48087, 48090. 
47738, 47856, 48022, 48155, 
48328. 
47801, 47803, 47809. 
47776 , 47944 , 48020, 48025, 
49103, 49141, 49247. 
Most of the recaptures given in Table 26 were taken by the tagging vessels, but 
in a few cases commercial fishermen made the catch. Examples were selected only 
from the tagging years 1923 and 1927, because we had opportunity to tag and re- 
capture more cod on Nantucket Shoals those years than any of the others. However, 
each of the years from 1923 to 1928 produced virtually the same result as regards the 
close association of the individuals making up various small schools of cod. 
Those cod retaken (by the Halcyon) in October, 1923, as a result of the tagging 
done the preceding June, show how stationary the fish must have been on Nantucket 
Shoals that summer. The May, 1927, cod recaptured November 16-19, 1927, are 
particularly interesting, for they are the latest group of fall recaptures to be taken 
on the shoals. It is possible these fish did not migrate over the winter; but that 
part of the May, 1927, cod had already gone westward, is shown by the recapture on 
November 16 to 21, 1927, of 4 cod of this same school (Nos. 47545, 47715, 47854, and 
48324) off northern New Jersey. It will be noted that the recapture dates of these 
latter fish coincide with those of the fish retaken on the shoals just mentioned, and it 
is also noteworthy that, as all of them were tagged on May 6, 1927, the body of fish to 
which they belonged must have held together rather well, in spite of the fact that they 
had traveled westward about 200 miles. Other examples of this could be cited. 
Another interesting point bearing on the localization of Nantucket cod during 
the summer is furnished by the records of cod which were recaptured more than 
once. Such records were made possible because all of the 120 cod retaken and again 
released on the shoals by the tagging vessels were liable to be recaught a second time. 
Those fish which fell in this category are listed in Table 27. 
