CLARK and BROWN: CHANGES IN BIOMASS OF FINFISHES AND SQUIDS 



46 613 



X 



\ 



LINEAR 



. RETRANSFORMED 



1963 64 



73 1974 



V^ 



FIGURE 1 1 .—(Top) Trends in catchability coefficients 

 calculated by year using untransformed and re- 

 transformed survey data, and (bottom) distributions 

 of stratified mean catch per tow in numbers expressed 

 as relative percentages of the total number of survey 

 tows by year for Georges Bank haddock. 



NUMBERS /TOW 



17 



