1 . The weigh: of scrod and haddock and the effort in terms of days fished by 

 subarea were obtained for the periods of concern from the catch records of the commer- 

 cial fleet. 



2 . From the average weight of scrod and haddock during these periods these 

 weights were converted to numbers of scrod and haddock. 



3 These numbers of scrod and haddock were then allocated to their respective 

 age groups from age readings of scale samples obtained from the landings of a random 

 selection of boats. 



4. The catch per day of each age was computed as percentages of the total 

 catch in order to facilitate comparison with the data for census cruises. 



Table 16 . - - Age group distribution of haddock over bottom during the 

 spring 



Type of bottom 



Sand 

 Mud 



Sand 

 Mud 



1-2 



87.39 

 13.85 



88.32 

 6.93 



3-4 



32.18 

 



Age group 



5-9+ 



3-9+ 



Number per tow 

 6781 

 

 t^eight per tow 

 30.26 62.44 







Total 



150.76 

 6.93 



Because the commercial fleet tended to concentrate in certain areas it was further 

 necessary to weight the census data according to the effort expended by the commercial 

 fleet and to exclude data outside the area fished by the fleet. This effort in terms of 

 days fished and percentage of the total days fished by subarea is given in table 17. 



Table 17- - Effort of the commercial fleet in terms of days fished per 



month and percentage 



41 



