62 
BULLETIN OF THE BUREAU OF FISHERIES 
On the next cruise to Nantucket Shoals we fished from August 31 to September 
3, 1927, chiefly in the vicinity of Round Shoal and Rose and Crown buoys where 
1,468 cod were caught. Unquestionably the D cod were still present and fully as 
dominant as in May and June. The peak still remained at 21 inches at Round 
Shoal buoy (fig. 20, No. 2), indicating that the fish had not grown appreciably during 
the interim from late June to the end of August. 
It is hard to understand why the fish showed an increase of 1 inch in length 
from May to June and only about three-fourths inch from June to August — a period 
when we could have expected them to grow fully as fast as during the spring. Yet 
Figure 22. — No. 1 =length-frequency distribution of 180 cod caught 15 miles SE. by E. from Round Shoal buoy June 17, 
1927. No. 2=length-frequency distribution of 93 cod caught off Great Rip buoy May 4-7 (solid curve) and 643 caught 
June 16-25, 1927 (broken curve). No. S=length-frequency distribution of 1,016 cod caught at Great Rip buoy October 
15-17, 1927 
the frequency distributions as shown by Figure 20 show rather conclusively that we 
are dealing with the same stock of fish. 
During very limited fishing on the Chatham grounds 38 cod were caught on 
September 2 — too few to show graphically — but it is significant that 10 of these 
belonged to the 21 -inch class, indicating that the D cod were still the dominant school 
there as they were in May and June. 
The last cruise to Nantucket Shoals in 1927 was made in October, when fishing 
was done from the 14th to the 17th. Both Round Shoal and Great Rip were fished, 
but not the Chatham grounds. 
