of the, Fishery Board for Scotland. 

 Average Weight {grammes) of Herrings. 



53 



* One specimen. 



The herrings got in Upper Loch Fyne in December are rather less in 

 weight than those got there in November ; but there is not much material 

 upon which to found. 



In some cases of fishes of the same length, the heavier herring sometimes 

 had a larger reproductive organ ; in other cases it had a smaller organ. 

 Milroy gives the weights of a number of herrings from Loch Fyne during 

 the period May to December. The weights of the reproductive organs are 

 also shown. The paper was mainly concerned with the chemical composi- 

 tion of the herrings in different seasons. Milroy says : — " In the summer 

 fish from Loch Fyne, when the ovaries are in an immature condition the 

 fat percentage was usually about that which is given as the average for 

 the herring. The fat percentage of the herring muscles therefore continues 

 rising during the three months probably of August, September, and 

 October. It begins to fall slightly in November, markedly in December, 

 most markedly during spawning, and continues at a low level until the 

 fish begins to feed again." [The fish probably begins to feed immediately 

 after spawning]. " The fat percentage of the ovaries is highest in Loch 

 Fyne herrings between the months of July and September." 



The weight of a number of herrings measuring from 2 to 32 cm. in 

 length is given by Fulton in his paper, " Op the Rate of Growth of 

 Fishes." 



