See 
If we consider the average sizes of the year 
classes, we find very high figures, the great 
majority being over 30cm. They are thus large 
herring, which also agrees with the supposition 
that they belong to the Norwegian race. 
The composition with regard to age here 
shows that a single year class (1904) is very 
strongly represented, amounting to over 40 %. 
Here also we find great similarity with the 
large herring and spring herring in 1911. 
Samples 3—6 consisted chiefly of summer 
or autumn spawning fish, 3 and 6 contained 
a proportion of spring spawning individuals, 
while 5 included some young fat herring. 
Examination of the average size of the 
year classes shows (with the exception of the 
mixed sample No. 3) much lower figures than 
in Nos. 1 and 2; the composition is here 
entirely different. The 1904 year class is much 
less strongly represented; the year classes 1906 
and 1905, on the other hand, play a far more 
important part, 1906 in particular amounting 
in Nos. 4—6 to 30 % or more. 
All these samples were taken within the 
area where HEINCKE’S autumn spawning ocean 
fish occur, in the waters about the Shetlands, 
the Dogger Bank, the Jutland Bank, and 
Bohuslan. 
Finally, we have in No. 7 a sample of 
much smaller fish, 22—26.5 cm., from the Eng- 
lish coast. These are a mixture of spring 
spawning fish (coast herring) and young fat 
herring. The composition shows great predo- 
minance of the 1908 year class, (which in May 
1911 shows three winter rings); the 1907 year- 
class, however, is also strongly represented. 
If we compare all the samples together, it is 
immediately noticeable that they contain three 
different types, distinguished by peculiarities in 
the average size of the year classes, season of 
spawning, and composition in point of age. 
Figs. 36 and 37 show examples of the com- 
position, as to size and age, of each of these 
types, samples 2, 4 and 7 having been selected 
as representative. 
1909 08 07 06 05 04 03 02 01 1900 99 
1909 08 07 06 05 04 03 02 01 1900 99 
Fig. 37. Composition in point of age 
of same samples as in Fig. 36. 
9 
