GEORGES BANK HADDOCK— PART i: LANDINGS 



159 



Table 3. — Scrod haddock landed, by seasons and years 

 [In tbousands of pounds] 



Table 4. — Large haddock landed, by seasons and years 

 [In tbousands of pounds] 



Table 5. — Total haddock landed, by seasons and years 

 [In thousands of pounds] 



AVERAGE WEIGHTS OF HADDOCK 

 LANDED 



Average weights of fish landed, in each season, 

 year, subarea, and market category, were com- 

 puted by combining length samples of haddock 

 landed with seasonal length-weight relations. This 

 procedure is described in the following paragraphs. 



At the Boston Fish Pier, lengths of representa- 

 tive samples of the haddock landed were obtained 

 from 1931 through 1948. In general, 50 scrod 

 and 100 large haddock were measured from a 

 " trip" when a vessel had fished in only one subarea 

 of Georges Bank, and as many vessels were 

 sampled as time permitted. 



Each fish was measured from the tip of the 

 snout to the fork of the tail. Lengths were re- 

 corded by centimeter groups, that is, fish measur- 

 ing from 40.0 centimeters to and including 40.9 

 centimeters were recorded as 40 centimeters, 

 fish from 41.0 centimeters to and including 41.9 

 centimeters as 41 centimeters, and so on. No dis- 

 tinction as to sex was possible as most haddock, 

 when landed, are already dressed. 



The numbers of Georges Bank haddock that 

 were measured, by years, seasons, and market 

 categories are shown in table 6. In all, measure- 

 ments of 627,996 haddock from Georges Bank were 

 utilized in this analysis. 



Table 7 illustrates the general method used to 

 compute the average weight of haddock landed. 

 The steps of this method are as follows: (1) The 

 number of fish of each centimeter size group in the 

 total sample for the season was entered in column 

 II; (2) the length-weight relation was available by 

 seasons (table 8 and figure 7) and the average 

 weights for each centimeter size group were listed 

 in column III, the total weight of all fish measured 

 of each centimeter size group was computed in 

 column IV, and the total weight of all sizes in the 

 season's sample was entered at the bottom of 

 column IV; and finaUy (3) the total weight of the 

 sample was divided by the number of fish in the 

 sample to give the average weight of the fish in the 

 sample. We used this same general method for 

 each season, year, subarea, and market category. 



Summaries of average weights are given in 

 table 9 and figure 8; to save space, values for the 

 various subareas are not shown. 



