284 



BULLETIN OF THE BUREAU OF FISHERIES 



Table 8 



Station 



Western line 



Station 



Eastern line 



Percentage 

 in cleavage 

 stages 



Number 

 of eggs 



Percentage 

 in cleavage 



stages 



Number 

 of eggs 



28 



100 

 100 

 100 

 100 



490 

 88 

 154 

 142 



27 



oooo 

 oooo 



18 

 39 

 2 

 6 



26 _ - 



25 



24 



23.. 



22 



21 







The general movement of the set is shown further by the distribution of incuba- 

 tion stages. As the table indicates, all of the eggs taken on trip 10 were in cleavage 

 stages. Figure 16 gives the combined results of the three trips to the Ipswich grounds. 

 It will be seen that in Ipswich Bay the cod eggs drift out at even earlier stages than 

 in Massachusetts Bay, for of 1,767 taken north of Cape Ann, only 1 contained a late 

 embryo. This appeared at station 22, the most southerly station on the inner line. 



Whither these eggs drift is a question. Appearing during the increased spring 

 set, virtually all of them pass south across the entrance of Massachusetts Bay, 

 and those that do enter probably do not penetrate far but soon are carried out again 



Table 9. — Record of recoveries of 11 bottles set adrift on April 7, 1926, in Ipswich Bay 



Released 



Recovered 



Bottle 

 No. 



Sta- 

 tion 



Time, 

 a. m. 



Latitude 

 (north) 



Longitude 

 (west) 



Locality 



Date 



Interval, 



days 



95 



23 

 23 

 21 

 29 



3.20 

 3. 20 

 4 30 



6. 10 



42 49 30 

 42 49 30 

 42 46 00 

 42 38 00 



O f If 



70 40 00 

 70 40 00 

 70 40 00 

 70 33 00 



\i mile west of Race Point, Cape Cod.. 



Apr. 21 

 Apr. 24 

 July 21 

 Apr. 29 



14 

 17 



105 

 22 



96 



mile southeast of Race Point. 



97 



2 miles off Cutler, Me 



99 



2 miles north of Brant Rock Coast Clunrd Station, 

 Mass. 



DRIFT-BOTTLE RECORDS 



Eleven bottles were placed in Ipswich Bay on April 7, 1925, and of these, four 

 have been recovered (Table 9). One entered Massachusetts Bay and was found 

 near the Brant Rock Coast Guard Station. Two moved south across the entrance 

 and stranded near Cape Race, and one drifted around the gulf to Cutler, Me., near 

 the western entrance of the Bay of Fundy. The movements of these bottles reflect 

 the~nature of„the currents at this time. In passing Cape Ann, two were carried in 

 the main set directly across the entrance of Massachusetts Bay to the tip of Cape 

 Cod. Another, passing outside of Cape Cod, followed the counterclockwise set 

 around the Gulf of Maine, probably traveling along the eastern part of Georges 

 Bank. The route taken by bottle No. 99 indicates that a branch of the current, 

 passing Cape Ann, turns west and follows the shore line into Massachusetts Bay. 

 Any statement regarding the migrations of eggs from Ipswich Bay in the spring must, 

 therefore, be merely speculative. However, it is possible that, like the winter and 

 early spring eggs from Plymouth, some of which, after leaving Massachusetts Bay, 

 appear to go east and others west, many of the Ipswich eggs may deflect to the east 

 after passing south of the Cape and, if the movement happens to be seaward (bottle 

 No. 120), supply Georges Bank as well as Nantucket Shoals. 



