144 



Part III — Twenty-second Annual Report 



to its length is the turbot, and after it comes the brill ; at the opposite 

 extreme is the witch, which is the lightest of all : — - 



Cm. 



Turbot. 



3 

 « 



Lemon Dab. 



Plaice. 



Common 

 Dab. 



Flounder. 



Witch. 



; Long Rough 

 ! Dab. 



' Little Sole. 



Cod. 



Haddock. 



Whiting. 



Herring. 



Sprat. 



5 









1-1-7 



1 17 



"97 





*45 







1*04 









•67 



10 









9-6 



8*7 







5 '7 



10'8 



7 '93 



7 '8 



7'1 



5 "9 



67 



15 







32-3 



34 



281 



31-3 



14-1 



21-6 





30-7 



28-3 



23-8 



23-4 





20 







89 3 



77-1 



74-7 



78 



35-4 



58-5 





711 



65-7 



54-2 



55 1 





30 









2991 



296-4 



279 



170-4 







271-8 



243-3 



213-6 



219-5 





35 



922 



622 



561 



484-6 



470 



440 



283-5 







420 



381 



322 







40 





978 



788 



708 





683 



458 







614 



592 



513 







45 



2,000 



1,373 



1,076 



1,026 







677 







907 



828 









50 



2,706 



2,145 





1,429 













1,139 











60 



5,000 







2,468 













2,057 











70 



8,569 







3,908 













3,380 











80 





















5,000 











100 





















10,194 











Among the other flat-fishes the lemon sole comes after the brill, then 

 the plaice, common dab, flounder, and long rough dab, but several of 

 them are very close together. Among the round-fishes the cod is the 

 heaviest in proportion to its length, with the haddock next, and then the 

 whiting. The sprat is, in proportion to its length, heavier than the 

 herring, which shows much the same ratio as the long rough dab. It is 

 noteworthy that the extremes in regard to the length-weight ratio should 

 be exhibited among the flat-fishes. 



It will also be noticed that the variation in weight at a given size in 

 the same species increases very much as the fish grows in length, so that 

 at the larger sizes, of the cod or turbot for example, the variation in this 

 respect is most pronounced. For this reason the terminal parts of the 

 curves are less satisfactory than the lower parts, as may be seen in the 

 diagrams, and it would probably require a very extensive series of 

 observations on these larger forms to give the relation between the length 

 and the weight with high precision. Nevertheless, I think the curves 

 given will be found useful in dealing with many questions connected 

 with the fisheries. 



The number of the various species which have been measured and 

 weighed for the purpose of this research are as follows : — 



Cod, 



471 



Little sole, 



54 



Haddock, 

 Whiting, 



844 



Turbot, 



29 



507 



Brill, 



Flounder, - 



100 



Norway pout, - 



218 



48 



Plaice, - 



913 



Halibut, - 



38 



Lemon dab, 



165 



Herring, - 



482 



Common dab, - 

 Long rough dab, 



541 



Sprat, 



339 



335 



Gurnard, - 



63 



Witch, - 



426 



Armed bullhead, 



59 





Lumpenus, 



43 



— the total being 5675 fishes. 



