HADDOCK FROM GEORGES AXD BROWNS BANKS 



181 



Table 3. — Age composition of 4^2 Browns Bank haddock, by scale analysis 

 [In parentheses is the percentage that each age contributed to the total for each size] 



Length in 3-centimeter 

 groups ' 



15 cen 

 18 cen 

 21 cen 

 Z'l cijn 

 27 cen 

 30 ci'ii 

 33 cen 

 36 cen 

 39 ecu 

 42 cen 

 45 cen 

 48 cen 

 51 cen 

 54 cen 

 57 cen 

 fiOccn 

 63 cen 



timeters.. 

 timctcrs., 

 timeters,. 

 timeters.. 

 timeters. - 

 timeters.. 

 timeters.. 

 timeters., 

 timeters.. 

 timeters.. 

 timeters., 

 timeters.. 

 timeters.. 

 timeters.. 

 timeters., 

 timeters.. 

 timeters.. 



All sizes.. 



Number and percent in age group — 



13 (100.0) 

 62 (89.9) 

 13 (16.0) 



7 (10. 1) 

 68 (S4.0) 

 50 (96.2) 

 11 (31.4) 



2 (3.8) 



24 (68.6) 



49 (100.0) 



32 (97.0) 



12 (63.2) 



1 (3.0) 

 7 (36.8) 



19 (90.5) 



20 (87.0) 

 10 (40.0) 



4 (17.4) 



2 (9.5) 



3 (13.0) 



15 (60.0) 



16 (69.6) 

 5 (83.3) 

 1 (12.6) 



42 



2 (8.7) 

 (0.0) 

 5 (62.5) 



1 (4.3) 



1 (16.7) 



2 (25.0) 

 1 (50.0) 



1 (50.0) 

 1 (100.0) 



9 and over 



2 (100.0) 



ToUl 

 number, 

 all ages 



13 



69 



81 



52 



35 



49 



33 



19 



21 



23 



25 



23 



6 



8 



2 



1 



2 



462 



1 See text footnote 1 . 



centimetei-s caught on Georges Bank, 378 (92.1 

 percent) were estimated to be 2-year-olds and 32 

 (7.9 percent) to be 3-year-oIds. 



The total numbers of haddock caught of each 

 size and age, shown in tables 4 and 5, were trans- 

 formed into percentages and plotted in figure 4. 

 In effect, this amounted to converting the per- 

 centage size compositions shown in figure 2 into 

 percentage age compositions. From figure 4, it 

 can be seen that, as already suspected from figure 

 2, the modes are composed largely- of fish of 

 different ages. 



It can be seen from figure 3 and also from table 

 6 that for each age the fish caught on Georges 

 Bank were considerably larger than those caught 

 on Browns Bank. One-year-olds from Georges 

 averaged 22.7 centimeters as compared with only 

 17.9 centimeters from Browns; 2-year-olds from 

 Georges were 36.6 centimeters as compared with 

 22.4 from Browns; 3-year-olds were 43.2 centime- 

 ters as compared with 30.6; 4-year-olds were 49.4 

 centimeters as compared with 41.1 centimeters. 

 Also shown in table 6 are the ranges of the means, 

 expressed as the mean + 2 times its standard 



T.\BLE 4. — Estimated age distribution of haddock catch from 

 Georges Bank 



Table 5. — Estimated age distribution of haddock catch from 

 Browns Bank 



' See text footnote 1. 



' See text footnote 1. 



