CAyADIAX FISH t: HIES KM'KDiriOS, 191 'rlo 



123 



twelve samples in all, of grown fish, all caught with the gill-net. In addition to these, 

 there is also a sample of quite young herring from the cruise of the steamer No. 33 in 

 the summer of 1915; this sample however, isolated as it is, will be of no importance 

 as regards the questions here dealt with. The samples are all from the west coast, 

 with the exception of one from White bay. 



Figs 32, 33 and 34, present, in graphical form, the results of the age determina- 

 tions, the material being here divided into three groups, according to season. 



/^ge groups 



10 11 12 15 14 15 tfe 17 18 19 20 21 27 21 



Spring 1914 



White Bay . pnmo May 

 156 mdivid 



Bay of Jslando, spring 

 ■72 indiv.d 



George Bay spring 

 53 'ndivid 



Georges Bay primo May 



S? Georges Bay orimo '^zy 

 156 ndivid 



Fig. 32. 



The Xewfoundland samples, like those from the ^Fagdalen island and Xorthum- 

 berland strait, include a considerable number of age-groups, the age of the specimens 

 varying from 4 to over 20 years. Only very few of these groups, however, are at all 

 numerously represented; in all the samples save one, the fish are found for the greater 

 part massed in a particular group, to wit, group 10 in the spring samples from 1914, 

 and group 11 in the later ones. Taking it for granted that summer growth in these 

 waters, as in those farther to the south in the Gulf, has not eonmienced by May, then 

 the age-group 10 will in the spring of 1914 answer to the year-class 1904, and similarly 

 presupposing that the new growth commences some time during the summer, then 

 age-group 11 in the autumn samples from 1914. and those from the spring of 1915 

 will be likewise equivalent to year-class 1904. All the samples, with the single excep- 

 tion named, thus bear witness to a state of things similar to that noted in the case 

 of the Norwegian stock, i. e., a single year-class taking up a dominant position, which 



6551— 12i 



