Van Eeckhaute et aL Movements of Melanogrammus aeglefinus determined from a population model 



669 



NMFS Fall Survey 



•63 '65 '67 '69 '71 '73 '75 '77 '79 



oHBD ID DDBDninnini 



DlDll D 

 DDnnBlDBD 



DBinr 



il "83 '85 



IDI 



'87 '89 '91 '93 



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 00 5 

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8 

 9+ 



GBDBBD 



r DBD 

 DBnBnBD 

 DBBBDBE 

 DBBDBBB 



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nn 

 ni 



□ 



ID^ 



NMFS Spring Survey '69 '71 '73 



1  BD nni 



§4 DBU 

 o 5 DBDni 

 a. 6 DBDnD 

 ^ 7 DBOr" 



8 nnnni 



9+ nnnnBnn 



Dl 



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DDI 

 DBni 

 ZZDI 



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 n 

 □ 



n 



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IDI 

 IDI 



■X> 'X5 'X7 '89 '91 '93 



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 ID 



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ID 



ID 



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 D 

 D 

 DD 



DDBBBD 

 DDDBBD 

 DDBBBD 

 DD BBD 

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NMFS Spring Surve\ 



'X7 '89 



B 1.0-0.75 

 B 0.74-0.5 

 □ 0.49-0.25 

 n 0.24-0 



c 



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a. 



1965 



1970 



1975 



1980 



1985 



1990 



Figure 4 



Ratios of relative abundance for haddock on eastern Georges Bank aggregated into four categories 

 from the DFO and NMFS surveys and (below) population abundance and recruitment at age 1 in 

 5Zj,m as estimated by sequential population analysis by Gavaris and Van Eeckhaute (1995). 



^ 



noted from the analyses of ratios of relative abundance, 

 in recent times few haddock have been found on the 

 U.S. side during the fall. For comparison purposes the 

 1963-71 distribution determined by using NMFS fall 

 survey data are also shown. It is evident that the 1963- 

 71 distribution pattern is markedly different from the 

 1985-95 patterns. The wide spread abundance obsei-ved 



west of the ICJ line in the 1963-71 period is no longer 

 present in recent times and the aggregations on the 

 northeast peak that were apparent from 1985 to 1995 

 were not evident in the earlier period. 



Spring season As with the fall results, the multi- 

 plicative model accounted for about half of the total 



