— 164 — 
and upwards, with but few of the “Bremer” and “Hollænder” class”. As we have seen, 
this has also proved to be the case in the following years. 
Investigations of cod and haddock in the North Sea and southern Norwegian 
waters. 
Hitherto we have only considered the stock of cod in northern Norwegian waters, 
the material here being larger and more methodically collected than elsewhere. It may, 
however, be of interest to briefly mention some results already published, which exhibit 
the closest agreement with what has been set forth in the present work. 
I mentioned in the introduction, that the International Commission for the study 
of the cod fishery had instituted the collection, on a methodical basis, of measurements 
of the trawl-caught fish, as also of material for age determinations. The object of these 
investigations was to study the size and age of the cod, and especially the variations 
in both factors from year to year in different localities. The material was dealt with 
in the Norwegian fishery laboratory, Dr. K. Dauı, Dr. D. Damas, and Dr. B. HELianp- 
Hansen taking part in the work. The results are published in the Report of the 
Commission referred to above. 
Many of the samples collected exhibited great variation in the numbers of the dif- 
ferent age classes, and it was also apparent, in these samples, that the 1904 year class 
was distinguished by a relatively high numerical value. Most surprising to those engaged 
upon the work was the fact that this year class proved to be the richest in samples taken 
at places a great distance apart, as in the Skagerak and off the coast of Romsdal. This 
will be seen from the following table, showing the composition in point of age of the had- 
dock in samples taken at different places. The analyses have previously been published 
in Dr. Damas’ treatise. The localities at which the samples were taken are as follows: 
| 1. Off the coast of Norway, August— October 1906: fishing experiments 
by Dr. K. Daut. 
| Jutland Bank, July-August 1906; trawl catches, “Michael Sars”. 
Haugsholmen, August 1906, “Michael Sars”. 
Romsdal, samples collected in winter 1906—1907. 
Dogger Bank 1906. 
Between Flamborough Head and Dogger Bank, September 1906. 
Great Fisher Bank, 1th August 1906. 
Deep waters of the North Sea, 1906, “Michael Sars”. 
Age analyses of haddock, Skagerak, Romsdal, North Sea 1906. 
Sl: 1906 1905 1904 1903 1902 1901 1900 1899 1898 1897 1896 1895 1894 1893 
ARÈNES OA 439 8 LS 275 Or Ai OS .. Qi 
Skagerak 
Romsdal 
See Oe E> 2 
f 
\ 
North Sea | 
ge 
Bo... HOS OF 702 a0 02 DA, MA 
Joo 192 7B 08 OS DS co os oo VD A Pel NIUE 
4.. IBA aa IR! 86 109 GH ol io © @ DS Ol (02 
De od TOs) LIN Lt 
GE 2 ClO HS oc ae peste wes rt 
ces 90 B85 GG» 19 OÙ As .. so © Wh) 
8.. 
19) DA 2 MIO Woe ar We 
