PKOGEESS IN BIOLOGICAL INQUIRIES 5 



and east of Cape Cod. Consequently the Nantucket Shoals fish can 

 be treated as a separate unit. 



The outstanding results of the fish tagging up to December, 1925, 

 were as follows: 



1. Nantucket Shoals: Cod tagged here in 1923, 1924, and 1925 have 

 migrated each fall to the shore waters of Rhode Island, Long Island, 

 and New Jersey. A few have been recaptured in South Channel, 

 and only stragglers were taken north of Cape Cod or on Georges 

 Bank. The majority were caught on Nantucket Shoals where they 

 were tagged. 



2. Stellwagen Bank, Massachusetts Bay: From a small number of 

 cod tagged on this bank, two recaptures were made off Cape Ann 

 and two off Rockaway, N. Y. There is therefore an indication of a 

 migration both north and south of Stellwagen. 



3. Portland to Boothbay Harbor, Me.: Most of the recaptures 

 made of these fish have been extremely local, but a few tagged cod 

 migrated offshore to Jeffreys Ledge and Platts Bank. The excep- 

 tional recaptures were made, one each, at Dennis (southern Massa- 

 chusetts), Stellwagen Bank, and Grand Manan, New Brunswick. 



4. Platts Bank: There were recaptured 18.3 per cent of the 218 

 cod tagged here in 1924, and 13.1 per cent of the 604 tagged in 

 1925. All recaptures were local except three, one at Harps- 

 well, Me., and two near Chatham, Mass. Therefore, no migration 

 from this bank was noted, but the local intensity of the fishing with 

 respect to the stock of cod evidently was great. 



5. Mount Desert: Thousands of cod were tagged here in 1924 

 and 1925. Nearly all recaptures were made locally, but enough 

 records were received to show that a small migration to the Bay of 

 Fundy occurred. A single cod tagged here was recaptured on Nan- 

 tucket Shoals, but this is the only record from below Cape Elizabeth, 

 Me. Local fishing evidently was very intensive, for up to the 1st of 

 December 31.8 per cent of 308 cod tagged in April, 1925, and 17.7 

 per cent of 1,303 cod tagged in May had been recaptured. 



Information concerning the migrations of pollock is not sufficient 

 to permit of definite conclusions. The 72 returns of fish tagged from 

 1923 to 1925 show that 60 were recaptured locally, in many cases a 

 year or more after tagging, and 12 made long migrations. From 

 Nantucket Shoals 4 tagged pollock were recaptured in South Chan- 

 nel, 1 on Georges Bank off Massachusetts, 1 on Cashes Bank, and 1 

 off Petit Manan, Me., and 3 in the lower Bay of Fundy, Canada. 

 One Platts Bank pollock was taken at Burnt Island, Me., and one 

 Jeffreys ledge fish was recaptured off Sable Island, Canada. 



Of 87 haddock records, several were incomplete, 20 fish made long 

 migrations, and the remainder were taken locally. From Nantucket 

 Shoals 8 were recaptured in South Channel, 1 on Georges, 3 on Stell- 

 wagen Bank, and 1 on Platts. From Boothbay Harbor, Me., 1 had- 

 dock migrated to Platts, and from Mount Desert 2 were taken in 

 New Brunswick, 3 on Platts Bank, and 1 in South Channel adjacent 

 to Nantucket Shoals. 



This work was efficiently conducted by W. C. Schroeder under 

 the general direction of Dr. H. B. Bigelow of the Museum of Com- 

 parative Zoology, Harvard University. It is planned to continue 

 the investigation during 1926, when offshore fishing banks, as well 

 as the usual shore grounds, will be fished. 



