GEORGES BANK HADDOCK — PART i: LANDINGS 



165 



pared with the average of that season for all years. 

 Figures 13a, 13b, and 13c show such contrasts in 

 terms of deviations from seasonal means. 



LENGTH IN CENTIMETERS 



LENGTH IN INCHES 



FiouRE 12a. — Size compositions of total haddock landings 

 from Georges Bank, by seasons and years, 1931 to 1936. 



40 60 40 60 40 60 40 60 40 60 



LENGTH IN CENTIMETERS 



Figure 12b. — Size compositions of total haddock landings 

 from Georges Bank, by seasons and years, 1937 to 1942. 



Table 31 and figure 14 show the yearly size 

 compositions for total haddock. Table 32 shows 

 the four seasonal size compositions for the average 

 of all 18 years. These values are shown also in 

 figure 11. 



In figure 14, it can be seen that there was con- 

 siderable variation in the relative numbers of vari- 

 ous sizes in different years. To study these dif- 

 ferences more readily, we plotted (fig. 15) devia- 



4060 4060 4060 40 60 4060 



LENGTH IN CENTIMETERS 



LENGTH IN INCHES 



-lEte- 



FiGURE 12c. — Size compositions of total haddock landings 

 from Georges Bank, by seasons and years, 1943 to 1948. 



40 60 40 60 40 60 ' 40 60 I 40 60~ 



LENGTH IN CENTIMETERS 



»« ^o 'si^io 'jo " iJo ' ^0 sjo " ' »' Jo 



LENGTH IN INCHES 



Figure 13a. — Deviations from the average size composi- 

 tions, by seasons, 1931 to 1936. 



tions from the average year. Here, it can be seen 

 that a scarcity of small-sized fish characterized 

 some years such as 1931, 1940, 1944, 1945, and 

 1946. In other years, such as 1943 and 1948, a 

 scarcity of large-sized fish occurred. In still others, 

 an abundance of either small-sized or large-sized 

 haddock occurred, or a scarcity or an abundance of 

 both — the scarce years of 1933, 1934, and 1935, 

 and the abundant year of 1941 demonstrate this. 

 In other years, such as 1937, all sizes were taken 

 in approximately average numbers. 



The differences in size composition help to ex- 

 plain how different average weights (shown in 

 table 9) occurred. As one example, the years 1936 



