29 



LATER STAG KS OF GADOIDS 



ingly see (fig. 59) that the seasonal curve for Haddock is identical with that for the total 

 catch for all demersal fish. The double maximum in the case of Haddock is a wellknown 

 feature, and is reproduced also in our Scotch statistics. I have drawn out in full for the 

 whole period of five years, month for month, the curves both for the total demersal catch 



I 1906 I 1907 1908 I 1909 I 1910 



J. F. M.A.MyJJy.A.S.O N D. J. M. My. Jy. S. N. | J. M. My. ,|y. S. N. I J. M. My. Jy. S. N. J. M. My. Jy. S. N. 



Fig. 6 1. Total North Sea Catch (in thousands of cwts.) of Haddock landed at English East Coast ports by 



Steam Trawlers, 1906 — 10. 



I 1906 I 1907 I 1908 I 1909 | 1910 



J.F. M.A.MyJJy.A.S.O.N. D.J. M. My. Jy. S. N. | J. M. My. Jy. S. N. [ J. M. My. Jy. S, N. | J. M. My. Jy. S. N. 



Fig. 62. Percentage Proportion of the Seceral Trade Categories of Haddock landed from the North Sea by 

 Steam Trawlers at ports on the East Coast of England, 1906 — 10. 



and for the catch of Haddock (fig. 60 and 61). In the former especially the spring maxi- 

 mum comes out particularly clear. In the case of the Haddock, irregularities are more 

 conspicuous, but a high spring maximum in certain years makes up for a diminished one 

 in others. It will be seen that a spring maximum in the case of several other fishes 

 contributes with Haddock to produce such a maximum in the monthly records of the 

 total catch. 



