er 
dreds of thousands of fishermen engaged in the industry. One of the earliest points noted 
— an experience which must have cost innumerable fruitless experiments, with enormous 
effort and expense, — is the fact that the drift nets working the different parts of the 
North Sea only take herring at certain definite times of the year. The herring fishery 
is everywhere restricted to a short season, which varies for the different banks of the 
North Sea; it is, however, sufficiently regular to permit of a rough determination as 
to where the fish are to be found in the different months of the year. 
fa Gk a Ebo 
6 7 8 2 _. (©) tt 12 
90 
80 
œ 
© 
50} 
40 
Percentage. 
30 
Sa Ue} 8S) eX) By) Be Rey 
Ce Qi EN Gyo ls 
13016 unselected Trawled Herring caught in 71 hauls SEPTEMBER 19 
a 25 26 27 28 29 30 31 32 
r € 
serres 2672 drift cought Herring from markets JUIN - NOVEMBER SIR 
Fig. 30. Herring from East Coast of England 1912; percentage of fish below each cm. size. 
Seasonal variation of the fishery. 
H.M.Kyre*) has performed the extremely valuable task of carefully collecting in- 
formation as to the fishing grounds and quantity of fish caught for each month in the 
year, expressing his results in a series of monthly charts for the year 1903. These give 
the best description of the course of the herring fishery in the North Sea. According 
to Kyre’s information, the fishing is, during the first three months of the year, carried 
*) Bulletin Statistique des Péches Maritimes, Vol. J, Copenhagen, 1906. 
