31 



of the same age in samples 2 to 10, being as follows : — 1 at 9 cm., 

 2 at 10 cm., 1 at 11 cm., 2 at 12 cm., 2 at 13 cm. and 1 at 14 cm. . 

 The first year growth made by herrings of three and four 

 winter rings in sample 11 was as follow^s : — 



Percextage at Centimetres. 



Of herrings with three winter rings having a greater first year 

 growth than 9 cm. there was 48 per cent., a higher percentage 

 than in any of the Northumberland Coast samples, which had an 

 average of 26 per cent., and a maximum of 38 per cent, of fish 

 making a growth of over 9 cm. in the first year. These fish also 

 give indication of a mixture of two growth groups. 



The first year growth of the herrings with four winter rings 

 is practically the same as that found in the Northumberland 

 samples in August. 



Two samples of Yorkshire Coast trawled herring, samples 12 



and 13, coming from ca. 70 miles E.S.E. of the Tyne, yielded a 



first year growth for herrings with two, three and four winter 



rings as follow^s : — 



Percentage at Centimetres. 

 Winter . . . - _ . ,. 



Rings. 



2 — — 



3 — - 



4 — — 



The herrings of two winter rings though present in small 

 number suggest a mixture of fish with different growths for the 

 first year. Those with three winter rings had 48 per cent, which 

 had made a first year growth of 8 and 9 cm., 10 per cent. w4th a 

 growth of less than 8 cm., and 41 per cent, with a growth greater 

 than 9 cm. They were different therefore from the Northun- 

 berland Coast herring in that more fish were present with a growth 

 of more than 9 cm. Herrings of four winter rings had made a 

 first year grow^th greater on the w^hole than those of either the 

 Northumberland Coast or the Yorkshire Coast drift net herrings, 

 and whilst containing fish of a similar growth to those obtained 



* 1 at 15 centimetres. 



