Van Eeckhaute et al.: Movements of Melanogrammus aegleftnus determined from a population model 



671 



Fall. Ages 1 ^ 



No. /tow 

  0.001 



• 25 



• 50 



• 100+ 







Spring, Ages 4+ 



No. /tow 



• 0.001 



• 25 



• 50 



• 100+ 







Figure 6 



Fall distributions of ages 1+ haddock and spring distributions of ages 4+ haddock on eastern 

 Georges Bank from the NMFS and DFO bottom-trawl surveys. The DFO data points are aggre- 

 gated due to the high density of sets. 



same depth range but, except for 1993, haddock were 

 much more abundant in 5Z2. 



The ratio of relative abundance trends from both 

 the NMFS spring survey and the DFO spring survey 

 indicated that haddock abundance is generally 

 greater on the Canadian side of the ICJ line, though 

 not as high as during the fall (Fig. 4). There was no 

 obvious pattern by age in the ratios of abundance. 

 The results of Friedman's test confirmed that there 

 was not a significant age effect in the DFO spring 

 survey but indicated that there were significant dif- 



ferences by age in the NMFS survey (Table 4). There 

 was a tendency for lower ratios as age increases but 

 the relationship was very weak (r-^=0.083 for ages 4- 

 9+). Similarities in ratios of relative abundance 

 among ages were examined with a correlation test 

 of arcsine-transformed NMFS survey ratios. This re- 

 vealed that age 1 did not correlate with any other 

 ages (r<0.5), ages 2 and 3 showed some correlation 

 with adjacent age classes, and ages 4-8 were highly 

 correlated (r>0.5; Fig. 7). The ratios were plotted as 

 three groups in Figure 8. For ages 4-8, there was 



