5Ö 55 60 65 m 



Fig. 51. Curves of measurements (in cms.) from catclies of spawning cod during the spring months. 



from Malangsgrund 70° N. Lat. 



from Lofoten 68° N. Lat. 



from the Romsdal banl<, north of 62° N. Lat. 



from the neighbourhood of Shetland, about 60° N. Lat. 



from the north-central portion of the North Sea, about 57° N. Lat. 



^"^1 



22- 



20- 



'8- 

 /6- 



/a 



10- 



8 

 6- 





\ 





50 



eo 



80 



Fig. 53. Curves showing the numbers of the different year-groups found in a 

 catch of saithe off the coast of Romsdal, in July 1907. 



'<iS 



^VOGI^^- 



i^Vr^oo» 



v;\< 



^* 



-c^i. VI 





:^" 



