When the catch per tow is expresseti m terms of weight rather than numbers we 

 find chat a conoiderable portion of the haddock stock occurred in deep water, at least 

 during the times of these surveys . 



To convert numbers of haddock to pounds the factors in table 6 were used. 



Table 6. -- Age-weight relationship of haddock in summer 



Age of fish 12 3 4 5 6 7 



Mean weight 0.30 0.93 1.71 2.60 3.43 4.12 4.56 5.71 



6.48 



9+ 



7.64 



These factors are average weights of each age during summer months . For the 

 purpose of sradying the differential age distribution with depth the fish were divided 

 into two groups according to age . The 4 -year -olds and younger fish were placed in 

 the first group while those more than 4-years old were placed in the second group . 

 The abundance of these two age groups at the different depths is presented in table 7. 



Table 7 . - -Depth distribution of young and old fish in summer 



21 



