44 
IL.—SIZE. 
By DOROTHY COWAN. 
In Table I. is given an analysis of the size of the herring samples 
examined during the past year. The size is, as in previous years, 
expressed to the nearest centimetre, 20-6 to 21-5 being taken as 
21 cm. 
It has not been considered necessary to give in Table II. all 
the samples in detail, as this would mean duplicating data already 
given in years past. An analysis of size for age is given for those 
that are thought to be the most important samples, and those 
from grounds not previously sampled. The latter include the 
samples from Great Yarmouth in June and October, Lerwick, 
June, 1922, Firth of Clyde, Irish Sea, north-west of Ireland, June, 
1921, and Galway Bay. As the Wick sample of 18th March was 
caught off the Butt of Lewis, and this is the first sample of spring 
spawners from these grounds, data for this sample are included. 
Data as to the origin of the samples will be found in the list 
given by Mr. Storrow (page 13). 
The most northerly samples were from Lerwick. The first 
of these was caught 2nd July from 25 miles south from Bressay. 
The majority of the fish were from 27 to 29 em. in length, and were 
fish principally at stages II. and III. This sample is interesting 
when compared with the second sample from the same port, caught 
24th August, 8 miles E.S.E. from Bressay. The August sample, 
as will be seen from Table I. of Mr. Storrow’s paper, was very similar 
in age composition to the July sample, but the size was larger. 
Large numbers of fish were under 28 and 29 em., but there was 27 
per cent. at 30 cm. A comparison of the samples is given below, 
and the difference in size will be seen to be most marked in fish 
with five and more winter rings. The August sample (II.) consisted 
of spawning fish and spents. 
