of the Salmon in Fresh Water. 



G7 



4. The weight of muscle in fish in the estuaries is greater than in fish 

 in the upper reaches, and this difference becomes more marked as the 

 season advances. 



TABLE VI. 



Showing Average Weight of Muscle per Fish of Standard Length in 

 Upper Waters: 



*Single fish. 



If the average of the three rivers be taken the figures are as follows: 



TABLE VII. 



Shouting Aven*age Weight of Muscle per Fish of Standard Length: 



Or, comparing the upper- water fish in October and November with the 

 upper-water fish earlier in the year, a loss of nearly 28 per cent, in 

 the weight of the muscle is found. 



(c) Ovaries. 



5. The weight of the ovaries per fish of standard length increases steadily 

 throughout the season both in the sea and in the river. These results 

 may be compared with those of Hoek and Miescher, and of the Scottish 

 Fishery Board (Fishery Reports 1895, Table p. 30). By these observers 

 the weight of the ovaries is given not as per fish of standard length, but as 

 percentage of the weight of the fish . Hoek's observations on salmon in the 

 Lower Rhine show an increase in the ovaries of from 0'5 per cent, in 

 March to 20 per cent, in November, while Miescher's investigations in 

 the Upper Rhine at Basel give an increase of from 0'75 per cent, in 

 March to 23 in November. 



The investigations at the mouth of the Tweed give an increase from 

 0-75 per cent, in March to 17 per cent, in November: 



[TABLE. 



