Table 14. -- Age group distribution by bottom type in summer 



Year 



Bottom type 0-2 



Age group 



3-4 



5-9+ 



3-9+ 



Numbers per tow 



This grouping shows that the catch per tow and weight per tow of unmarketable 

 haddock and scrod was greatest over sand. The catch per tow and weight per tow of 

 all marketable haddock (3-9+ years) was greatest over sand except in 1948. The 

 catch per tow and weight per tow of older haddock (5-9+ years) was with one excep- 

 tion slightly greater over mud than over sand bottoms . Although older haddock 

 occurred in greater numbers over mud than over sand, the separation is not as 

 marked as that corresponding to depth . 



In order to determine whether depth or bottom type was the controlling factor 

 in the distribution of older haddock, an analysis of variance was made on the abund- 

 ance data shown in table 15. 



36 



