Hunt et al,: Movement of Gadus morhua in the Gulf of Maine area 



857 



as well as onto Georges Bank. These results 

 correspond to those of historical studies, al- 

 though conclusions from the earlier studies 

 may be more limited in scope owing to the 

 smaller number of released fish and the lower 

 intensity of commercial fisheries at the time. 

 In his review of tagging results from the late 

 1890s to the 1960s in the Gulf of Maine, Wise 

 (1963) concluded that cod of the offshore ar- 

 eas of Browns and Georges Banks were closely 

 related to fish of the southwestern Nova Scotia 

 area. Wise and Jensen ( 1960 ) had earlier con- 

 cluded that the eastern Georges Bank cod 

 population mixed little with the more west- 

 ern or southern components and interacted 

 primarily with the southwestern Nova Scotia 

 area. Templeman (1962) in summarizing cod 

 tagging information for the northwest Atlan- 

 tic concluded that there were discrete spawn- 

 ing stocks on the eastern part of Georges Bank 

 and Browns Bank and mixing in both direc- 

 tions across the Fundian Channel as well as 

 to inshore areas. Results of tagging studies 

 completed in 1969 on Browns Bank and in 

 1972 from inshore areas of Nova Scotia were 

 reported by Halliday ( 1973) and he concluded 

 that there was a separation of inshore and off- 

 shore stocks. McKenzie (1956) and McCracken 

 (1956) tagged cod in the inshore area of south- 

 west Nova Scotia and observed limited inter- 

 change with the offshore banks and the Bay 

 of Fundy. They concluded that the resident 

 inshore cod stocks in the Bay of Fundy and 

 southwestern Nova Scotia were relatively sta- 

 tionary. They also explained the offshore re- 

 captures of cod tagged in the inshore area as 

 evidence that cod from more migratory stocks 

 could be present in inshore areas at certain 

 times of the year. 



Hunt and Buzeta (1989) provide details of 

 the basis for partitioning the northeast part 

 of Georges Bank (5Zj,m) as a separate Cana- 

 dian management unit distinct from the re- 

 mainder of the 5Zw-i-SA6 area. They concluded 

 that spatial distribution from tagging studies 

 and other biological characteristics were suf- 

 ficiently distinct to define the 5Zj.m area as a 

 management unit that could be expected to 

 benefit from management controls. However, 

 the 5Zj,m area is partitioned by the 1MB so 

 that commercial fisheries by Canada and the 

 United States are limited to their respective 

 sides. Gavaris et al. (1993) conducted an an- 

 alysis of cod movement in relation to the 1MB 

 using commercial catches and research sur- 



Recaptures (per mille) 

 from 1 984-85 releases 



-'^Kj^-''^ 



70 



-T^ — ' r 



69 68 



67 



— r 



66 



— r 



65 



64 



63 



Figure 10 



Di.stribution of adjusted cod tag recoveries from releases in the Georges 

 Bank (5Zj) area, aggregated by 10-min latitude and longitude squares: 

 (Al 1994 releases; (Bi 1984-85 releases 



