85 



herrings with five winter rings, and not one had made a first year 

 growth of less than 6 cm., and 80 per cent, had a first year growth 

 of 6 to 8 cm. As will be seen below, sample 5 differs from sample 4, 



12 13 14 Nos. 



— — — 62 



— — — 59 



— — — 73 



Sample A4 came form the northern part of the fishing ground 

 in the beginning of September, the 9th. It shows evidence of the 

 change mentioned for September, 1913, brought about by the 

 addition of fish with a comparatively small first year growth. The 

 particulars relating to the first year growth made by the fish of 

 this sample here follow : — 



Percentage at Centimetres. 



10 11 12 13 14 



24 2 — — — 42 



8 3 — — — 125 



3 — — — — 64 



1917.* — Sample Al came from 15 miles N.E. of Berwick, 

 7th July, and sample 2 came from 24 miles N.E. by N. of the 

 Tyne, 20th July. The difference between the first year grow^th 

 of the herrings with three and four winter rings in these samples 

 is comparable with the ditference found between the samples of 

 1916 in June and July when it was show^l that sample CI which 

 marked the southern limit of our fishing grounds bore evidence 

 of mixing of growth groups. Sample 2 of 1917 differs from sample 

 Al, having a greater range of growth for the majority of the fish, 

 and the herrings of four winter rings give indication of a mixing 

 of growth groups. 



The first year growth of herrings with three winter rings here 



The first year growth of herrings with four winter rings was 

 as follows : — 



* Report, New Serio?, VIT. page 8. 



