From census data for similar periods charts were constructed showing the 

 distribution of i- 2, 3-4, 5-9-»-, and 3-9-1— year -old fish representing unmarketable 

 haddock, scrod haddock, large haddock, and all marketable haddock . The following 

 four units of abundance were used: 



Number of fish 

 Designation per half hour tow 



Very heavy 

 Heavy 

 Medium 

 Light 



These charts showing the area fished by the commercial fleet and the location 

 of the different age groups of haddock as determined by census tows during July and 

 August of 1949 and 1950 are presented in figure 17. _' 



In July and August 1949, the maximum effort of the commercial fleet was ex- 

 pended in subarea J (see figure 11) with limited fishing taking place in subareas M 

 and G. The distribution of the various age groups as determined from census tows 

 showed that large concentrations of unmarketable haddock (1-2 years) were located 

 in subareas J and M, but were also found in subareas N, O, and H which were outside 

 the area fished by the commercial fleet. The maximum concentration of scrod haddock 

 (3 -4 years) was found in subareas M and J, but limited numbers were also caught by 

 the Albatross HI in deeper water in the western side of the channel (subarea G) and 

 in the North East Rip (subareas H and J) . 5-9-t— year-old haddock were found in very 

 limited concentrations in subareas J and M with the majority of these large haddock 

 being located in the deep water of subareas G and H. The greatest concentration of 

 all marketable haddock (3-9-)- years) occurred in subareas J and M and extended con- 

 siderably south of the location of maximum fleet effort. Relatively large concentra- 

 tions of 3-9-1- year haddock were also found in deep water in subareas G, H, and J. 



It is seen then that in the summer of 1949 the commercial fleet concentrated on 

 1-4 -year -old haddock and did not sample large areas, especially m deeper water, 

 where the majority of older haddock and considerable quantities of scrod were found. 

 This fact is substantiated by the age composition of the commercial catch during 

 July and August, 1949. 



6/ It must be kept in mind that a marked difference exists between the two 

 sampling techniques involved. The commercial data is representative of the effort 

 per unit area for a two month period while the census data is only representative of 

 the age -group concentration during the short period required to sample a specific 

 area . Because there is bound to be some movement of these concentrations over a 

 two month period, the correlation between fishing effort and location is at best an 

 approximation . 



46 



